Syntax

#include <stdlib.h>
void srand(unsigned int seed);

srand sets the starting point for producing a series of pseudo-random integers. If srand is not called, the rand seed is set as if srand(1) were called at program start. Any other value for seed sets the generator to a different starting point.

The rand function generates the pseudo-random numbers.

There is no return value.

This example first calls srand with a value other than 1 to initiate the random value sequence. Then the program computes five random values for the array of integers called ranvals.

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

int main(void)
{
   int i,ranvals[5];

   srand(17);
   for (i = 0; i < 5; i++) {
      ranvals[i] = rand();
      printf("Iteration %d ranvals [%d] = %d\n", i+1, i, ranvals[i]);
   }
   return 0;

   /****************************************************************************
      The output should be similar to:

      Iteration 1 ranvals [0] = 24107
      Iteration 2 ranvals [1] = 16552
      Iteration 3 ranvals [2] = 12125
      Iteration 4 ranvals [3] = 9427
      Iteration 5 ranvals [4] = 13152
   ****************************************************************************/
}

• rand

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