Daviddoria at 15:06, 30 July 2012

2012-07-30T15:06:46Z

Daviddoria at 15:04, 30 July 2012

2012-07-30T15:04:47Z

Daviddoria: Created page with '==RandomNumbers.cpp== #include #include //drand48() #include #include using namespace std; void RandomInts(); void Ran…'

2010-06-23T13:04:27Z

Created page with '==RandomNumbers.cpp== <source lang="cpp"> #include <iostream> #include <cstdlib> //drand48() #include <cstdio> #include <ctime> using namespace std; void RandomInts(); void Ran…'

New page

==RandomNumbers.cpp==
<source lang="cpp">
#include <iostream>
#include <cstdlib> //drand48()
#include <cstdio>
#include <ctime>

using namespace std;

void RandomInts();
void RandomDoubles();
void RandomFloats();

int RandomInt(const int MAX);
double RandomDouble();
float RandomFloat();

int main()
{
unsigned int t = time(NULL);
cout << t << endl;
srand(t);

//RandomFloats();
RandomDoubles();
//RandomInts();

return 0;
}

void RandomInts()
{
//srand((unsigned)time(0)); //if you dont do this, they are the same every time

int random_integer;
int n = 10;
int MAX = 5;

for(int index = 0; index < n; index++)
{
random_integer = RandomInt(MAX);
cout << random_integer << endl;
}
}

void RandomDoubles()
{
//srand48((unsigned)time(0)); //if you dont do this, they are the same every time

int n = 10;
//produce n random doubles between 0 and 1

for(int i = 0; i < n; i++)
{
double r = RandomDouble();
cout << r << endl;
}
}

void RandomFloats()
{
//srand48((unsigned)time(0)); //if you dont do this, they are the same every time

int n = 10;
//produce n random doubles between 0 and 1

for(int i = 0; i < n; i++)
{
float r = RandomFloat();
cout << r << endl;
}
}

double RandomDouble()
{
//produce a random double between 0 and 1
return drand48();
}

float RandomFloat()
{
//produce a random float between 0 and 1
return drand48();
}

int RandomInt(const int MAX)
{
//produce an int from 0 to MAX-1
return rand() % MAX;
}
</source>

@@ Line 21: / Line 21: @@
    cout << t << endl;
    srand(t);
-   sdrand(t);
+   srand48(t);
    //RandomFloats();

CPP/RandomNumbers - Revision history

Daviddoria at 15:06, 30 July 2012

Daviddoria at 15:04, 30 July 2012

Daviddoria: Created page with '==RandomNumbers.cpp== #include #include //drand48() #include #include using namespace std; void RandomInts(); void Ran…'