C++ Programming/Code/Standard C Library/Functions/rand

#include <cstdlib>
int rand( void );

The function rand() returns a pseudo-random integer between zero and RAND_MAX. An example:

srand( time(NULL) );
for( i = 0; i < 10; i++ )
  printf( "Random number #%d: %d\n", i, rand() );

The rand() function must be seeded before its first call with the srand() function - otherwise it will consistently return the same numbers when the program is restarted.

Related topics

srand