Syntax

#include <stdlib.h>
int rand(void);

rand generates a pseudo-random integer in the range 0 to RAND_MAX (macro defined in <stdlib.h>). Use srand before calling rand to set a starting point for the random number generator. If you do not call srand first, the default seed is 1.

rand returns a pseudo-random number.

This example prints the first 10 random numbers generated.

#include <stdlib.h>
#include <stdio.h>

int main(void)
{
   int x;

   for (x = 1; x <= 10; x++)
      printf("iteration %d, rand=%d\n", x, rand());
   return 0;

   /****************************************************************************
      The output should be:

      iteration 1, rand=16838
      iteration 2, rand=5758
      iteration 3, rand=10113
      iteration 4, rand=17515
      iteration 5, rand=31051
      iteration 6, rand=5627
      iteration 7, rand=23010
      iteration 8, rand=7419
      iteration 9, rand=16212
      iteration 10, rand=4086
   ****************************************************************************/
}

• srand

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