code

[molatelo]

wat does this code do?
#include <stdlib.h>
#include <stdio.h>

int main( void )
{
int j, s[100];

int srand(unsigned int s);

j = 1 + (rand() % 100);
printf( " %d\n", j );
return 0;
}

[Banfa]

It declares the function srand (which is unnecessary because it is declared in stdlib.h) then it calls rand without having seeded the random number generator and performs some minor maths on the result finally printing the result which will be the same every time because the random number generator was not seeded.

[Sandro Bosio]

It declares the function srand (which is unnecessary because it is declared in stdlib.h)

Indeed the declaration of srand in stdlib.h is void srand(unsigned) , and not int srand(unsigned) , so this code does not compile to me.

then it [...] performs some minor maths on the result

which is obviously to obtain a random number between 1 and 100, which as noticed will not be so random after all.

Sandro