Format
#include <stdlib.h>
int rand(void);
General Description
The rand() function generates a pseudo-random integer in the range
0 to
RAND_MAX. Use the srand() function before calling
rand() to set a seed for the random number generator. If you do not
make a call to srand(), the default seed is 1.
Note: Use
of this function requires that an environment has been set up by using
the __cinit() function. When the function is called, GPR 12 must contain
the environment token created by the __cinit() call.
Returned Value
The rand() function returns the calculated value.