Syntax
#include <stdlib.h> void srand(unsigned int seed);Description
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
****************************************************************************/
}
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