ProgrammingExamples - User contributions [en]

CPP/Classes/Conversion Function

2010-07-21T17:29:32Z

FirstPerson: Created page with '<source lang = "cpp"> #include <iostream> #include <climits> #include <sstream> #include <string> using namespace std; template<typename R, typename T> R to(const T& in){ stri…'

<source lang = "cpp">
#include <iostream>
#include <climits>
#include <sstream>
#include <string>

using namespace std;

template<typename R, typename T>
R to(const T& in){
stringstream ss;
ss << in;
R r = R();
ss >> r;
return r;
}

class Int{
private:
int var;
public:
Int(int i = 0): var(i){};

int value(){ return var; }
void value(int i){ var = i; }

//conversion operator
operator string(){ return to<string>(var); }
};

int main(){
Int num = 10;
string strNum = num; //use the conversion operator
cout << num.value() << endl;
cout << strNum + ".456" << endl;
}
</source>

CPP

2010-07-21T17:23:08Z

FirstPerson: /* Classes */

= C++ =
A statically typed, free-form, multi-paradigm, compiled, general-purpose programming language. It is regarded as a "middle-level" language, as it comprises a combination of both high-level and low-level language features. It was developed by Bjarne Stroustrup starting in 1979 at Bell Labs as an enhancement to the C programming language and originally named C with Classes. It was renamed C++ in 1983. (http://en.wikipedia.org/wiki/C++)
----
=== Programming Examples ===
* [[CPP/AlphebetizeString|Alphabetize a vector of strings]]
* [[CPP/ZeroPad|Pad a number with zeros]]
* [[CPP/BinaryIO|Binary input and output]]
* [[CPP/ExecuteLinuxCommand|Execute a linux command]]
* [[CPP/Casting|Casting]]
* [[CPP/KeyboardInput|Keyboard input]]
* [[CPP/CommandLineArguments|Command line arguments]]
* [[CPP/DeepCopy|Deep copy]]
* [[CPP/DefaultArguments|Default arguments]]
* [[CPP/Enum|Enum]]
* [[CPP/Exceptions|Exceptions]]
* [[CPP/Infinity|Infinity]]
* [[CPP/Logging|Logging]]
* [[CPP/Namespaces|Namespaces]]
* [[CPP/NAN|NAN (not a number)]]
* [[CPP/OverloadOperator|Overload operator]]
* [[CPP/ParallelSort|Parallel sort]]
* [[CPP/RandomNumbers|Random numbers]]
* [[CPP/StringStream|StringStream]]
* [[CPP/Struct|Struct]]
* [[CPP/Switch|Switch]]
* [[CPP/Typedef|Typedef]]

=== I/O ===
* [[CPP/IO/Setw|Column width (setw)]]
* [[CPP/IO/FileInput|File input]]
* [[CPP/IO/FileOutput|File output]]
* [[CPP/IO/ReadingLines|Reading lines from a text file]]

=== Strings ===
* [[CPP/Strings/Compare|Compare strings]]
* [[CPP/Strings/Concatenate|Concatenate]]
* [[CPP/Strings/CountCharacters|Count characters]]
* [[CPP/Strings/Split|Split]]
* [[CPP/Strings/Case_Conversion|Case conversion]]
* [[CPP/Strings/SingleCharacterTag|Find the contents of a single character tag]]

=== Classes ===
* [[CPP/Classes/ClassTemplate|Class template]]
* [[CPP/Classes/ConstructorInheritance|Constructor inheritance]]
* [[CPP/Classes/InitializationList|Initialization list]]
* [[CPP/Classes/DerivedClass|Derived class]]
* [[CPP/Classes/DownCasting|Down casting]]
* [[CPP/Classes/FriendClass|Friend class]]
* [[CPP/Classes/NestedClasses|Nested classes]]
* [[CPP/Classes/PureVirtualFunction|Pure virtual function]]
* [[CPP/Classes/Singleton|Singleton]]
* [[CPP/Classes/Conversion Function|Conversion Function]]

=== Loops ===
* [[CPP/Loops/DoWhile|Do while]]
* [[CPP/Loops/While|While]]
* [[CPP/Loops/For|For]]

=== STL Data Structures ===
*[[CPP/STL/String|String]]
*[[CPP/STL/Vector|Vector]]
*[[CPP/STL/List|List]]
*[[CPP/STL/Set|Set]]
*[[CPP/STL/MultiSet|MultiSet]]
*[[CPP/STL/Map|Map]]
*[[CPP/STL/MultiMap|MultiMap]]
*[[CPP/STL/Pair|Pair]]
*[[CPP/STL/PriorityQueue|Priority queue]]
*[[CPP/STL/Queue|Queue]]
*[[CPP/STL/Tuple|Tuple]]

=== STL Algorithms ===
* [[CPP/STL/RandomShuffle|Random shuffle]]
* [[CPP/STL/Sort|Sort a vector]]
* [[CPP/STL/SetDifference|Find the different elements in two containers (set_difference)]]
* [[CPP/STL/RandomData|Random data (std::generate)]]
* [[CPP/STL/ForEach|ForEach]]

=== Debugging ===
* [[CPP/Debugging/Assert|Assert]]
* [[CPP/Debugging/LineNumbers|LineNumbers]]

=== C++ TR1 ===
*[[CPP/TR1/Regex_Tokenising|Tokenising with RegEx]]

=== C++0x ===
*[[CPP/C++0x/Hash|Hash]]

=== Math ===
*[[CPP/Math/Exponential|Exponential function]]
*[[CPP/Math/MinMax|Min and Max]]
*[[CPP/Math/Trig|Trig functions]]

=== C-Style Programming Techniques ===
* [[CPP/Array|Array]]
* [[CPP/2DArray|2D Array]]
* [[CPP/CharacterArray|Character array]]
* [[CPP/Macros|Macros]]
* [[CPP/FunctionPointer|Function pointer]]
* [[CPP/VariableNumberOfArguments|Variable number of function arguments]]

=== Boost ===
* [[CPP/Boost/Histogram|Create a histogram (accumulator)]]
* [[CPP/Boost/Numeric/Matrix|Matrix]]
* [[CPP/Boost/ProgramOptions/Simple|Simple command line argument parsing (ProgramOptions)]]
* [[CPP/Boost/ProgramOptions/MultipleArguments|Multiple command line argument parsing (ProgramOptions)]]
* [[CPP/Boost/ProgressBar|ProgressBar]]
* [[CPP/Boost/Threads|Threads]] - I'm not sure if this is correct?
* [[CPP/Boost/Timer|Timer]]

=== Utility ===
* [[CPP/Template Print|Generic Print]]
* [[CPP/DataType Converter | Generic DataType Converter]]

CPP/Array

2010-07-16T03:37:05Z

FirstPerson: /* Array.cpp */

==Array.cpp==
<source lang="cpp">
#include <iostream>
#include <ctime>

using namespace std;

int main()
{
srand(time(0)); //seed random number generator
const int maxSize = 10;
int rawArray[maxSize] = {0}; // 0 0 0 0 0 0 0 0 0 0

// generate 10 random numbers
for(int i = 0; i < maxSize; ++i) rawArray[i] = rand();

for(int j = 0; j < maxSize; ++j) cout << rawArray[j] << " ";

return 0;

}

</source>

CPP/Struct

2010-07-13T00:09:06Z

FirstPerson: /* Struct.cpp */

==Struct.cpp==
<source lang="cpp">
#include <iostream>
#include <string>

using namespace std;

/*
Use the keyword struct to declare a struct
Syntax: struct structVariableName { content };

Struct and classes are very similar in C++, the ONLY difference
is that struct by default is set to public while class is set
to private by default.

Below shows an example of one of many usuage of struct. Examples are
kept simple as possible.
*/
struct IntStringPair
{
private:
int m_first;
string m_second;
public:
IntStringPair(const int intVal = 0, const string& strVal = "")
: m_first(intVal), m_second(strVal)
{
}
int& first(){ return m_first; }
string& second(){ return m_second; }
};

int main (){
IntStringPair card = IntStringPair(10,"clubs");
cout << card.first() << " of " << card.second() << endl;
card.first() = 3;
card.second() = "hearts";
cout << card.first() << " of " << card.second() << endl;
return 0;
}

</source>

CPP/DefaultArguments

2010-07-08T22:39:16Z

FirstPerson: /* DefaultArguments.cpp */

==DefaultArguments.cpp==
<source lang="cpp">
#include <iostream>

using namespace std;

template<typename T>
void printNTimes(const T& arg, int n = 1){
for(int i = 0; i != n; ++i){
cout << arg << endl;
}
}

int main(int argc, char *argv[])
{
printNTimes("hello",5); //explicitly tell how many times to print
printNTimes("goodbye"); //use default argument of 1
return 0;
}

</source>

CPP/DefaultArguments

2010-07-08T22:38:39Z

FirstPerson: /* DefaultArguments.cpp */

CPP/DataType Converter

2010-07-08T03:16:37Z

FirstPerson: Created page with '<source lang = "cpp"> #include <iostream> #include <sstream> #include <string> using std::string; using std::cout; using std::endl; using std::stringstream; struct ConversionEr…'

<source lang = "cpp">
#include <iostream>
#include <sstream>
#include <string>

using std::string;
using std::cout;
using std::endl;
using std::stringstream;

struct ConversionError: std::exception{
ConversionError(const std::string& from,
const std::string& to
)
: exception( ("Failed to Convert From [" + from + "] to [" + to + "]").c_str() ){}
};

template< typename ReturnType, typename InputType>
ReturnType convertTo(const InputType& input){
std::stringstream strm;
strm << input;
ReturnType val = ReturnType();
if( (strm >> val).fail() ){
throw ConversionError( typeid(InputType).name(), typeid(ReturnType).name());
}
return val;
}

//for illustration purposes
struct Coord{
int x,y;
Coord(): x(), y(){}
};
std::istream& operator <<(std::istream& i, const Coord& c){
//for illustration purposes only, will cause the stream to fail when extracted
return i;
}

int main(){
//regular conversion
float f = convertTo<float>( string("123") + ".456" );
string s = convertTo<string>(f) + "789";

cout << f << endl;
cout << s << endl;

//Conversion Fail
Coord c;
try{
int i = convertTo<int>(c);
cout << i << endl;
}
catch(const ConversionError& e){ cout << e.what() << endl;}
return 0;
}
</source>

CPP

2010-07-08T02:53:52Z

FirstPerson: /* Utility */

= C++ =
A statically typed, free-form, multi-paradigm, compiled, general-purpose programming language. It is regarded as a "middle-level" language, as it comprises a combination of both high-level and low-level language features. It was developed by Bjarne Stroustrup starting in 1979 at Bell Labs as an enhancement to the C programming language and originally named C with Classes. It was renamed C++ in 1983. (http://en.wikipedia.org/wiki/C++)
----
=== Programming Examples ===
* [[CPP/AlphebetizeString|Alphabetize a vector of strings]]
* [[CPP/ZeroPad|Pad a number with zeros]]
* [[CPP/BinaryIO|Binary input and output]]
* [[CPP/ExecuteLinuxCommand|Execute a linux command]]
* [[CPP/Casting|Casting]]
* [[CPP/KeyboardInput|Keyboard input]]
* [[CPP/CommandLineArguments|Command line arguments]]
* [[CPP/DeepCopy|Deep copy]]
* [[CPP/DefaultArguments|Default arguments]]
* [[CPP/Enum|Enum]]
* [[CPP/Exceptions|Exceptions]]
* [[CPP/Infinity|Infinity]]
* [[CPP/Logging|Logging]]
* [[CPP/Namespaces|Namespaces]]
* [[CPP/NAN|NAN (not a number)]]
* [[CPP/OverloadOperator|Overload operator]]
* [[CPP/ParallelSort|Parallel sort]]
* [[CPP/RandomNumbers|Random numbers]]
* [[CPP/StringStream|StringStream]]
* [[CPP/Struct|Struct]]
* [[CPP/Switch|Switch]]
* [[CPP/Typedef|Typedef]]

=== I/O ===
* [[CPP/IO/Setw|Column width (setw)]]
* [[CPP/IO/FileInput|File input]]
* [[CPP/IO/FileOutput|File output]]
* [[CPP/IO/ReadingLines|Reading lines from a text file]]

=== Strings ===
* [[CPP/Strings/Compare|Compare strings]]
* [[CPP/Strings/Concatenate|Concatenate]]
* [[CPP/Strings/CountCharacters|Count characters]]
* [[CPP/Strings/Split|Split]]
* [[CPP/Strings/Case_Conversion|Case conversion]]
* [[CPP/Strings/SingleCharacterTag|Find the contents of a single character tag]]

=== Classes ===
* [[CPP/Classes/ClassTemplate|Class template]]
* [[CPP/Classes/ConstructorInheritance|Constructor inheritance]]
* [[CPP/Classes/InitializationList|Initialization list]]
* [[CPP/Classes/DerivedClass|Derived class]]
* [[CPP/Classes/DownCasting|Down casting]]
* [[CPP/Classes/FriendClass|Friend class]]
* [[CPP/Classes/NestedClasses|Nested classes]]
* [[CPP/Classes/PureVirtualFunction|Pure virtual function]]
* [[CPP/Classes/Singleton|Singleton]]

=== Loops ===
* [[CPP/Loops/DoWhile|Do while]]
* [[CPP/Loops/While|While]]
* [[CPP/Loops/For|For]]

=== STL Data Structures ===
*[[CPP/STL/String|String]]
*[[CPP/STL/Vector|Vector]]
*[[CPP/STL/List|List]]
*[[CPP/STL/Set|Set]]
*[[CPP/STL/MultiSet|MultiSet]]
*[[CPP/STL/Map|Map]]
*[[CPP/STL/MultiMap|MultiMap]]
*[[CPP/STL/Pair|Pair]]
*[[CPP/STL/PriorityQueue|Priority queue]]
*[[CPP/STL/Queue|Queue]]
*[[CPP/STL/Tuple|Tuple]]

=== STL Algorithms ===
* [[CPP/STL/RandomShuffle|Random shuffle]]
* [[CPP/STL/Sort|Sort a vector]]
* [[CPP/STL/SetDifference|Find the different elements in two containers (set_difference)]]
* [[CPP/STL/RandomData|Random data (std::generate)]]
* [[CPP/STL/ForEach|ForEach]]

=== Debugging ===
* [[CPP/Debugging/Assert|Assert]]
* [[CPP/Debugging/LineNumbers|LineNumbers]]

=== C++ TR1 ===
*[[CPP/TR1/Regex_Tokenising|Tokenising with RegEx]]

=== C++0x ===
*[[CPP/C++0x/Hash|Hash]]

=== Math ===
*[[CPP/Math/Exponential|Exponential function]]
*[[CPP/Math/MinMax|Min and Max]]
*[[CPP/Math/Trig|Trig functions]]

=== C-Style Programming Techniques ===
* [[CPP/Array|Array]]
* [[CPP/2DArray|2D Array]]
* [[CPP/CharacterArray|Character array]]
* [[CPP/Macros|Macros]]
* [[CPP/FunctionPointer|Function pointer]]
* [[CPP/VariableNumberOfArguments|Variable number of function arguments]]

=== Boost ===
* [[CPP/Boost/Histogram|Create a histogram (accumulator)]]
* [[CPP/Boost/Numeric/Matrix|Matrix]]
* [[CPP/Boost/ProgramOptions/Simple|Simple command line argument parsing (ProgramOptions)]]
* [[CPP/Boost/ProgramOptions/MultipleArguments|Multiple command line argument parsing (ProgramOptions)]]
* [[CPP/Boost/ProgressBar|ProgressBar]]
* [[CPP/Boost/Threads|Threads]] - I'm not sure if this is correct?
* [[CPP/Boost/Timer|Timer]]

=== Utility ===
* [[CPP/Template Print|Generic Print]]
* [[CPP/DataType Converter | Generic DataType Converter]]

CPP/STL/ForEach

2010-07-07T03:37:11Z

FirstPerson: Created page with '<source lang = "cpp"> #include <iostream> #include <algorithm> #include <vector> using namespace std; void showSquaredValue(const int n){ cout << n << "*" << n << " = " …'

<source lang = "cpp">

#include <iostream>
#include <algorithm>
#include <vector>

using namespace std;

void showSquaredValue(const int n){
cout << n << "*" << n << " = " << n*n << endl;
};

class RepeatSequence{
int begin, end;
int offset;
public:
RepeatSequence(int first, int last): begin(first),end(last - 1), offset(begin - 1){}
RepeatSequence(): begin(),end(), offset(){}
int operator()(){
return offset = offset >= end ? begin: offset + 1;
}
};

int main(){
vector<int> num;
const int MAX = 10;

std::generate_n(std::back_insert_iterator<vector<int>>( num ),
MAX,
RepeatSequence(0,5)
);

//for each values in the vector num, show its squared value
std::for_each(num.begin(),num.end(),showSquaredValue);

return 0;
}</source>

CPP

2010-07-07T03:36:04Z

FirstPerson: /* STL Algorithms */

= C++ =
A statically typed, free-form, multi-paradigm, compiled, general-purpose programming language. It is regarded as a "middle-level" language, as it comprises a combination of both high-level and low-level language features. It was developed by Bjarne Stroustrup starting in 1979 at Bell Labs as an enhancement to the C programming language and originally named C with Classes. It was renamed C++ in 1983. (http://en.wikipedia.org/wiki/C++)
----
=== Programming Examples ===
* [[CPP/AlphebetizeString|Alphabetize a vector of strings]]
* [[CPP/ZeroPad|Pad a number with zeros]]
* [[CPP/BinaryIO|Binary input and output]]
* [[CPP/ExecuteLinuxCommand|Execute a linux command]]
* [[CPP/Casting|Casting]]
* [[CPP/KeyboardInput|Keyboard input]]
* [[CPP/CommandLineArguments|Command line arguments]]
* [[CPP/DeepCopy|Deep copy]]
* [[CPP/DefaultArguments|Default arguments]]
* [[CPP/Enum|Enum]]
* [[CPP/Exceptions|Exceptions]]
* [[CPP/Infinity|Infinity]]
* [[CPP/Logging|Logging]]
* [[CPP/Namespaces|Namespaces]]
* [[CPP/NAN|NAN (not a number)]]
* [[CPP/OverloadOperator|Overload operator]]
* [[CPP/ParallelSort|Parallel sort]]
* [[CPP/RandomNumbers|Random numbers]]
* [[CPP/StringStream|StringStream]]
* [[CPP/Struct|Struct]]
* [[CPP/Switch|Switch]]
* [[CPP/Typedef|Typedef]]

=== I/O ===
* [[CPP/IO/Setw|Column width (setw)]]
* [[CPP/IO/FileInput|File input]]
* [[CPP/IO/FileOutput|File output]]
* [[CPP/IO/ReadingLines|Reading lines from a text file]]

=== Strings ===
* [[CPP/Strings/Compare|Compare strings]]
* [[CPP/Strings/Concatenate|Concatenate]]
* [[CPP/Strings/CountCharacters|Count characters]]
* [[CPP/Strings/Split|Split]]
* [[CPP/Strings/Case_Conversion|Case conversion]]
* [[CPP/Strings/SingleCharacterTag|Find the contents of a single character tag]]

=== Classes ===
* [[CPP/Classes/ClassTemplate|Class template]]
* [[CPP/Classes/ConstructorInheritance|Constructor inheritance]]
* [[CPP/Classes/InitializationList|Initialization list]]
* [[CPP/Classes/DerivedClass|Derived class]]
* [[CPP/Classes/DownCasting|Down casting]]
* [[CPP/Classes/FriendClass|Friend class]]
* [[CPP/Classes/NestedClasses|Nested classes]]
* [[CPP/Classes/PureVirtualFunction|Pure virtual function]]
* [[CPP/Classes/Singleton|Singleton]]

=== Loops ===
* [[CPP/Loops/DoWhile|Do while]]
* [[CPP/Loops/While|While]]
* [[CPP/Loops/For|For]]

=== STL Data Structures ===
*[[CPP/STL/String|String]]
*[[CPP/STL/Vector|Vector]]
*[[CPP/STL/List|List]]
*[[CPP/STL/Set|Set]]
*[[CPP/STL/MultiSet|MultiSet]]
*[[CPP/STL/Map|Map]]
*[[CPP/STL/MultiMap|MultiMap]]
*[[CPP/STL/Pair|Pair]]
*[[CPP/STL/PriorityQueue|Priority queue]]
*[[CPP/STL/Queue|Queue]]
*[[CPP/STL/Tuple|Tuple]]

=== STL Algorithms ===
* [[CPP/STL/RandomShuffle|Random shuffle]]
* [[CPP/STL/Sort|Sort a vector]]
* [[CPP/STL/SetDifference|Find the different elements in two containers (set_difference)]]
* [[CPP/STL/RandomData|Random data (std::generate)]]
* [[CPP/STL/ForEach|ForEach]]

=== Debugging ===
* [[CPP/Debugging/Assert|Assert]]
* [[CPP/Debugging/LineNumbers|LineNumbers]]

=== C++ TR1 ===
*[[CPP/TR1/Regex_Tokenising|Tokenising with RegEx]]

=== C++0x ===
*[[CPP/C++0x/Hash|Hash]]

=== Math ===
*[[CPP/Math/Exponential|Exponential function]]
*[[CPP/Math/MinMax|Min and Max]]
*[[CPP/Math/Trig|Trig functions]]

=== C-Style Programming Techniques ===
* [[CPP/Array|Array]]
* [[CPP/2DArray|2D Array]]
* [[CPP/CharacterArray|Character array]]
* [[CPP/Macros|Macros]]
* [[CPP/FunctionPointer|Function pointer]]
* [[CPP/VariableNumberOfArguments|Variable number of function arguments]]

=== Boost ===
* [[CPP/Boost/Histogram|Create a histogram (accumulator)]]
* [[CPP/Boost/Numeric/Matrix|Matrix]]
* [[CPP/Boost/ProgramOptions/Simple|Simple command line argument parsing (ProgramOptions)]]
* [[CPP/Boost/ProgramOptions/MultipleArguments|Multiple command line argument parsing (ProgramOptions)]]
* [[CPP/Boost/ProgressBar|ProgressBar]]
* [[CPP/Boost/Threads|Threads]] - I'm not sure if this is correct?
* [[CPP/Boost/Timer|Timer]]

=== Utility ===
* [[CPP/Template Print|Generic Print]]

CPP

2010-07-07T03:12:27Z

FirstPerson: /* STL Algorithms */

= C++ =
A statically typed, free-form, multi-paradigm, compiled, general-purpose programming language. It is regarded as a "middle-level" language, as it comprises a combination of both high-level and low-level language features. It was developed by Bjarne Stroustrup starting in 1979 at Bell Labs as an enhancement to the C programming language and originally named C with Classes. It was renamed C++ in 1983. (http://en.wikipedia.org/wiki/C++)
----
=== Programming Examples ===
* [[CPP/AlphebetizeString|Alphabetize a vector of strings]]
* [[CPP/ZeroPad|Pad a number with zeros]]
* [[CPP/BinaryIO|Binary input and output]]
* [[CPP/ExecuteLinuxCommand|Execute a linux command]]
* [[CPP/Casting|Casting]]
* [[CPP/KeyboardInput|Keyboard input]]
* [[CPP/CommandLineArguments|Command line arguments]]
* [[CPP/DeepCopy|Deep copy]]
* [[CPP/DefaultArguments|Default arguments]]
* [[CPP/Enum|Enum]]
* [[CPP/Exceptions|Exceptions]]
* [[CPP/Infinity|Infinity]]
* [[CPP/Logging|Logging]]
* [[CPP/Namespaces|Namespaces]]
* [[CPP/NAN|NAN (not a number)]]
* [[CPP/OverloadOperator|Overload operator]]
* [[CPP/ParallelSort|Parallel sort]]
* [[CPP/RandomNumbers|Random numbers]]
* [[CPP/StringStream|StringStream]]
* [[CPP/Struct|Struct]]
* [[CPP/Switch|Switch]]
* [[CPP/Typedef|Typedef]]

=== I/O ===
* [[CPP/IO/Setw|Column width (setw)]]
* [[CPP/IO/FileInput|File input]]
* [[CPP/IO/FileOutput|File output]]
* [[CPP/IO/ReadingLines|Reading lines from a text file]]

=== Strings ===
* [[CPP/Strings/Compare|Compare strings]]
* [[CPP/Strings/Concatenate|Concatenate]]
* [[CPP/Strings/CountCharacters|Count characters]]
* [[CPP/Strings/Split|Split]]
* [[CPP/Strings/Case_Conversion|Case conversion]]
* [[CPP/Strings/SingleCharacterTag|Find the contents of a single character tag]]

=== Classes ===
* [[CPP/Classes/ClassTemplate|Class template]]
* [[CPP/Classes/ConstructorInheritance|Constructor inheritance]]
* [[CPP/Classes/InitializationList|Initialization list]]
* [[CPP/Classes/DerivedClass|Derived class]]
* [[CPP/Classes/DownCasting|Down casting]]
* [[CPP/Classes/FriendClass|Friend class]]
* [[CPP/Classes/NestedClasses|Nested classes]]
* [[CPP/Classes/PureVirtualFunction|Pure virtual function]]
* [[CPP/Classes/Singleton|Singleton]]

=== Loops ===
* [[CPP/Loops/DoWhile|Do while]]
* [[CPP/Loops/While|While]]
* [[CPP/Loops/For|For]]

=== STL Data Structures ===
*[[CPP/STL/String|String]]
*[[CPP/STL/Vector|Vector]]
*[[CPP/STL/List|List]]
*[[CPP/STL/Set|Set]]
*[[CPP/STL/MultiSet|MultiSet]]
*[[CPP/STL/Map|Map]]
*[[CPP/STL/MultiMap|MultiMap]]
*[[CPP/STL/Pair|Pair]]
*[[CPP/STL/PriorityQueue|Priority queue]]
*[[CPP/STL/Queue|Queue]]
*[[CPP/STL/Tuple|Tuple]]

=== STL Algorithms ===
* [[CPP/STL/RandomShuffle|Random shuffle]]
* [[CPP/STL/Sort|Sort a vector]]
* [[CPP/STL/SetDifference|Find the different elements in two containers (set_difference)]]
* [[CPP/STL/RandomData|Random data (std::generate)]]
* [[CPP/STL/ForEacg|For Each]]

=== Debugging ===
* [[CPP/Debugging/Assert|Assert]]
* [[CPP/Debugging/LineNumbers|LineNumbers]]

=== C++ TR1 ===
*[[CPP/TR1/Regex_Tokenising|Tokenising with RegEx]]

=== C++0x ===
*[[CPP/C++0x/Hash|Hash]]

=== Math ===
*[[CPP/Math/Exponential|Exponential function]]
*[[CPP/Math/MinMax|Min and Max]]
*[[CPP/Math/Trig|Trig functions]]

=== C-Style Programming Techniques ===
* [[CPP/Array|Array]]
* [[CPP/2DArray|2D Array]]
* [[CPP/CharacterArray|Character array]]
* [[CPP/Macros|Macros]]
* [[CPP/FunctionPointer|Function pointer]]
* [[CPP/VariableNumberOfArguments|Variable number of function arguments]]

=== Boost ===
* [[CPP/Boost/Histogram|Create a histogram (accumulator)]]
* [[CPP/Boost/Numeric/Matrix|Matrix]]
* [[CPP/Boost/ProgramOptions/Simple|Simple command line argument parsing (ProgramOptions)]]
* [[CPP/Boost/ProgramOptions/MultipleArguments|Multiple command line argument parsing (ProgramOptions)]]
* [[CPP/Boost/ProgressBar|ProgressBar]]
* [[CPP/Boost/Threads|Threads]] - I'm not sure if this is correct?
* [[CPP/Boost/Timer|Timer]]

=== Utility ===
* [[CPP/Template Print|Generic Print]]

CPP/Template Print

2010-07-05T21:58:15Z

FirstPerson: Created page with '<source lang = "cpp"> #include <iostream> #include <string> namespace Print { using std::cout; using std::endl; using std::string; template<typename T> void print(const T…'

<source lang = "cpp">

#include <iostream>
#include <string>

namespace Print
{
using std::cout;
using std::endl;
using std::string;

template<typename T>
void print(const T& arg){
cout << arg;
}
void print(){
cout << endl;
}

template<>
void print(const bool& b){
cout << (b ? "TRUE" : "FALSE" );
}

template< typename T>
void println(const T& arg){
cout << arg << endl;
}

void println(){
cout << endl;
}
template<>
void println(const bool& b){
cout << (b ? "TRUE" : "FALSE") << endl;
}

template< typename FrwdItr >
void print(FrwdItr begin, FrwdItr end, const string& sep){
while(begin != end){
cout << *begin++ << sep;
}
}
};

int main(){

using namespace Print;

println(true);
println(false);
string A[4] = {"this","is","a","string"};
print(A,A+4," ");
print();

return 0;
}

</source>

CPP

2010-07-05T21:40:04Z

FirstPerson: /* C++ */

= C++ =
A statically typed, free-form, multi-paradigm, compiled, general-purpose programming language. It is regarded as a "middle-level" language, as it comprises a combination of both high-level and low-level language features. It was developed by Bjarne Stroustrup starting in 1979 at Bell Labs as an enhancement to the C programming language and originally named C with Classes. It was renamed C++ in 1983. (http://en.wikipedia.org/wiki/C++)
----
=== Programming Examples ===
* [[CPP/AlphebetizeString|Alphabetize a vector of strings]]
* [[CPP/ZeroPad|Pad a number with zeros]]
* [[CPP/BinaryIO|Binary input and output]]
* [[CPP/ExecuteLinuxCommand|Execute a linux command]]
* [[CPP/Casting|Casting]]
* [[CPP/KeyboardInput|Keyboard input]]
* [[CPP/CommandLineArguments|Command line arguments]]
* [[CPP/DeepCopy|Deep copy]]
* [[CPP/DefaultArguments|Default arguments]]
* [[CPP/Enum|Enum]]
* [[CPP/Exceptions|Exceptions]]
* [[CPP/Infinity|Infinity]]
* [[CPP/Logging|Logging]]
* [[CPP/Namespaces|Namespaces]]
* [[CPP/NAN|NAN (not a number)]]
* [[CPP/OverloadOperator|Overload operator]]
* [[CPP/ParallelSort|Parallel sort]]
* [[CPP/RandomNumbers|Random numbers]]
* [[CPP/StringStream|StringStream]]
* [[CPP/Struct|Struct]]
* [[CPP/Switch|Switch]]
* [[CPP/Typedef|Typedef]]

=== I/O ===
* [[CPP/IO/Setw|Column width (setw)]]
* [[CPP/IO/FileInput|File input]]
* [[CPP/IO/FileOutput|File output]]
* [[CPP/IO/ReadingLines|Reading lines from a text file]]

=== Strings ===
* [[CPP/Strings/Compare|Compare strings]]
* [[CPP/Strings/Concatenate|Concatenate]]
* [[CPP/Strings/CountCharacters|Count characters]]
* [[CPP/Strings/Split|Split]]
* [[CPP/Strings/Case_Conversion|Case conversion]]
* [[CPP/Strings/SingleCharacterTag|Find the contents of a single character tag]]

=== Classes ===
* [[CPP/Classes/ClassTemplate|Class template]]
* [[CPP/Classes/ConstructorInheritance|Constructor inheritance]]
* [[CPP/Classes/InitializationList|Initialization list]]
* [[CPP/Classes/DerivedClass|Derived class]]
* [[CPP/Classes/DownCasting|Down casting]]
* [[CPP/Classes/FriendClass|Friend class]]
* [[CPP/Classes/NestedClasses|Nested classes]]
* [[CPP/Classes/PureVirtualFunction|Pure virtual function]]
* [[CPP/Classes/Singleton|Singleton]]

=== Loops ===
* [[CPP/Loops/DoWhile|Do while]]
* [[CPP/Loops/While|While]]
* [[CPP/Loops/For|For]]

=== STL Data Structures ===
*[[CPP/STL/String|String]]
*[[CPP/STL/Vector|Vector]]
*[[CPP/STL/List|List]]
*[[CPP/STL/Set|Set]]
*[[CPP/STL/MultiSet|MultiSet]]
*[[CPP/STL/Map|Map]]
*[[CPP/STL/MultiMap|MultiMap]]
*[[CPP/STL/Pair|Pair]]
*[[CPP/STL/PriorityQueue|Priority queue]]
*[[CPP/STL/Queue|Queue]]
*[[CPP/STL/Tuple|Tuple]]

=== STL Algorithms ===
* [[CPP/STL/RandomShuffle|Random shuffle]]
* [[CPP/STL/Sort|Sort a vector]]
* [[CPP/STL/SetDifference|Find the different elements in two containers (set_difference)]]
* [[CPP/STL/RandomData|Random data (std::generate)]]

=== Debugging ===
* [[CPP/Debugging/Assert|Assert]]
* [[CPP/Debugging/LineNumbers|LineNumbers]]

=== C++ TR1 ===
*[[CPP/TR1/Regex_Tokenising|Tokenising with RegEx]]

=== C++0x ===
*[[CPP/C++0x/Hash|Hash]]

=== Math ===
*[[CPP/Math/Exponential|Exponential function]]
*[[CPP/Math/MinMax|Min and Max]]
*[[CPP/Math/Trig|Trig functions]]

=== C-Style Programming Techniques ===
* [[CPP/Array|Array]]
* [[CPP/2DArray|2D Array]]
* [[CPP/CharacterArray|Character array]]
* [[CPP/Macros|Macros]]
* [[CPP/FunctionPointer|Function pointer]]
* [[CPP/VariableNumberOfArguments|Variable number of function arguments]]

=== Boost ===
* [[CPP/Boost/Histogram|Create a histogram (accumulator)]]
* [[CPP/Boost/Numeric/Matrix|Matrix]]
* [[CPP/Boost/ProgramOptions/Simple|Simple command line argument parsing (ProgramOptions)]]
* [[CPP/Boost/ProgramOptions/MultipleArguments|Multiple command line argument parsing (ProgramOptions)]]
* [[CPP/Boost/ProgressBar|ProgressBar]]
* [[CPP/Boost/Threads|Threads]] - I'm not sure if this is correct?
* [[CPP/Boost/Timer|Timer]]

=== Utility ===
* [[CPP/Template Print|Generic Print]]

CPP/Debugging/Assert

2010-06-30T11:58:26Z

FirstPerson: /* Assert.cpp */

==Assert.cpp==

<source lang="cpp">
#include <iostream>
#include <cassert>
#include <string>
#include <cmath>

using namespace std;

float Sqrt(float n){
assert(n >= 0);
return sqrt(n);
}
int main(){

Sqrt(16); //pass
Sqrt(-16); //fail

return 0;
}

</source>

CPP/Loops/For

2010-06-30T02:55:38Z

FirstPerson: Created page with '<source lang = "cpp"> #include <iostream> using namespace std; int main(){ for(int i = 1; i <= 100; i++ ){ if(i % 2 == 0) cout << i << " is even\n"; else cout << i << …'

<source lang = "cpp">
#include <iostream>
using namespace std;

int main(){

for(int i = 1; i <= 100; i++ ){
if(i % 2 == 0) cout << i << " is even\n";
else cout << i << " is odd\n";
}

return 0;
}
</source>

CPP/Loops/While

2010-06-30T02:54:00Z

FirstPerson: Created page with '<source lang = "cpp"> #include <iostream> using namespace std; int main(){ const int END = 0; int input = -1; while(input != END){ cin >> input; cout << input * 2 << …'

<source lang = "cpp">
#include <iostream>
using namespace std;

int main(){

const int END = 0;
int input = -1;

while(input != END){
cin >> input;
cout << input * 2 << endl;
}

return 0;
}
</source>

CPP/Classes/InitializationList

2010-06-29T05:06:39Z

FirstPerson: /* InitializationList.cpp */

==InitializationList.cpp==
<source lang="cpp">
#include <iostream>

class IntFloatChar{
private:
int i;
float f;
char c;
public:
IntFloatChar()
: i(), f(), c() //initializer list, set i,f,c to its default value by calling its default ctor
{}
IntFloatChar(int I, float F, char C)
: i(I), f(F), c(C) // initializer list, set value to the passed arguments
{}

int& intValue(){ return i; }
float& floatValue(){ return f;}
char& charValue(){ reutrn c; }
};

int main(int argc, char* argv[]){
//uses initializer list to initialize data
IntFloatChar crazyDataType = IntFloatChar(1,'a',0.1f);
IntFloatChar whatIsThis = IntFloatChar();

return 0;
}

</source>

CPP/Debugging/Assert

2010-06-29T05:00:28Z

FirstPerson: /* Assert.cpp */

==Assert.cpp==

<source lang="cpp">
#include <iostream>
#include <cassert>
#include <string>

using namespace std;

void didPass(const string& password){
assert(password == "drama");
}
int main(){

didPass("drama");

cout << "Test 1 passed\n";

assert("DRunk");

return 0;
}

</source>

CPP/STL/SetDifference

2010-06-29T04:56:40Z

FirstPerson: /* SetDifference.cpp */

==SetDifference.cpp==
<source lang="cpp">
#include <iostream>
#include <list>
#include <algorithm>
#include <string>
#include <iterator>

//prints a any collection that supports begin and end iterator
template<class Coll>
void print(const Coll c){
using std::cout;
using std::endl;

typename Coll::const_iterator itr = c.begin();
cout << "{ ";
while(itr != c.end())
{
cout << *itr++ << " ";
}
cout << "}";
}

int main()
{
using namespace std;
string s1 = "abce";
string s2 = "abde";
list<char> a = list<char>(s1.begin(),s1.end());
list<char> b = list<char>(s2.begin(),s2.end());
list<char> res;

//need to sort before call to set_difference
b.size(); a.sort();

std::set_difference(a.begin(),a.end(),b.begin(),b.end(),std::back_insert_iterator<list<char> >(res));

print(a);
cout << " - ";
print(b);
cout << " = ";
print(res);
cout << endl;

return 0;
}
</source>

CPP/STL/RandomData

2010-06-29T04:48:31Z

FirstPerson: /* Generate.cpp */

==Generate.cpp==
<source lang="cpp">
#include <iostream>
#include <vector>
#include <algorithm>

struct RandFloat{
float operator()() { return rand()/(float)RAND_MAX; }
};

int main (int argc, char *argv[])
{
//create some random data
std::vector<float> data(10,0.0f);
//from data.begin to end, generate random floats for each index
std::generate(data.begin(), data.end(), RandFloat());

for(unsigned int i = 0; i < data.size(); i++){
std::cout << data[i] << std::endl;
}

return 0;
}

</source>

CPP/Classes/PureVirtualFunction

2010-06-29T04:38:09Z

FirstPerson: /* PureVirtualFunction.cpp */

==PureVirtualFunction.cpp==
<source lang="cpp">
#include <iostream>
#include <limits>

class Point3{

public:
Point(const double xin, const double yin, const double zin) : x(xin), y(yin), z(zin) {}
Point() x(),y(),z(){};
private:
double x,y,z;
virtual void print(){ cout << "(" << x << "," << y << "," << z << ")" << endl; }
};

class Coordinate: Point3
{
void point(){
cout << "Coordinate (" << x << "," << y << "," << z << ")" << endl;
}
};

int main(){
Point3 p1 = new Point3(1,2,3);
Coordinate c1 = new Coordinate();

//polymorphism
Point3 *p = &c1;
p.print(); //output "Coordinate (0,0,0)"

p = &p1;
p.print(); //output "(1,2,3)"

return 0;
}
</source>

==Virtual Functions & Abstract Classes==
<source lang="cpp">
#include <iostream>

class Vehicle
{
public:
/*
* Here we declare a Pure Virtual Function
* This class has now become an abstract class &
* it's instances cannot be created. Only pointers.
*
*/
virtual void SeeMeGo()=0;
};

/* Some Derived Classes */
class Car : public Vehicle
{
public:
void SeeMeGo()
{
std:cout<<"I'm running at 50mph.\n";
}
};

class Bike : public Vehicle
{
public:
void SeeMeGo()
{
std:cout<<"I'm whooshing at 80mph.\n";
}
};

class Truck : public Vehicle
{
public:
void SeeMeGo()
{
std:cout<<"I'm crawling at 20mph.\n";
}
};

int main(int argc, char *argv[])
{
//Create a Pointer to Abstract Class Vehicle
Vehicle *myVehicle;

//Create Some Objects
Car myCar;
Bike myBike;
Truck myTruck;

//Call Functions
myVehicle = &myCar;
myVehicle->SeeMeGo();

myVehicle = &myBike;
myVehicle->SeeMeGo();

myVehicle = &myTruck;
myVehicle->SeeMeGo();

return 1;
}
</source>

CPP/Strings/Concatenate

2010-06-29T04:32:47Z

FirstPerson: /* Concatenate.cpp */

==Concatenate.cpp==
<source lang="cpp">
#include <iostream>
#include <string>
#include <sstream>

using namespace std;

int main()
{
string firstName = "jello";
string middleName = "K.";
string lastName = "mello";

//concat strings together using the operator +
string fullName = firstName + " " + middleName + " " + lastName;

cout << fullName << endl;
return 0;
}

</source>

CPP/Namespaces

2010-06-29T04:27:09Z

FirstPerson: /* Namespaces.cpp */

==Namespaces.cpp==
<source lang="cpp">
#include <iostream>
using namespace std;

namespace Math{
bool isOdd(const int n){ return (n & 1) == 1; }
bool isEven(const int n){ return !isOdd(n); }
static const float PI = 3.1415f;
static const float DEGTORAD = PI/180.0f;
}

int main(){
//use the scope operator, :: , to access a function or variable;
for(int i = 1; i != 10; ++i){
if( Math::isOdd(i) ){
cout << i << " is odd " << endl;
}
}

//use the using declaration
{
using Math::isEven; //isEven is only in scope after this semicolon
if( isEven(1010112) ) cout << "\nIts even...\n";
} //and is invalid after this closing brackets

{
//use everthing from the Math namespace
using namespace Math;
cout << PI << endl;
}

return 0;

}

</source>

CPP/Struct

2010-06-29T04:15:00Z

FirstPerson: /* Struct.cpp */

CPP/FunctionPointer

2010-06-25T23:33:45Z

FirstPerson:

<source lang = "cpp">
#include <iostream>
using namespace std;

int add(int a, int b) { return a + b; }
int subtract(int a, int b) { return a - b; }
int multiply(int a, int b) { return a * b; }
int divide(int a, int b) { return a / b ; }

//to make syntax easier, use typedef for a function pointer
//AritmaticFunctionPointer is a pointer function that takes a function with a int return value with 2 int parameter
typedef int (*ArithmaticFunctionPointer)(int,int);

int ApplyFunction(const ArithmaticFunctionPointer func, int a, int b){
return (*func)(a,b);
}

int main(){
const int ADD = 1;
const int SUB = 2;
const int MULT = 3;
const int DIV = 4;
int a = 0;
int b = 0;

cout <<"Enter 2 number : " ;
cin >> a >> b;

cout << "Choose :\n[1]ADD\n[2]SUBTRACT\n[3]MULTIPLY\n[4]DIVIDE\n<input> : ";
int opt = 0;
cin >> opt;

switch(opt){
case ADD: cout << ApplyFunction(add,a,b) << endl; break;
case SUB: cout << ApplyFunction(subtract,a,b)<< endl;; break;
case MULT: cout << ApplyFunction(multiply,a,b)<< endl;; break;
case DIV: cout << ApplyFunction(divide,a,b)<< endl;; break;
default: cout << "Invalid Options...exiting...\n"; break;
}

return 0;
}
</source>