Random number generator in c

random.c

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>

int main(int argc, const char * argv[]) {
    srandom(getpid());
    for (int i = 0; i < 16; i++) {
        long int r = random();
        printf("%ld\n", r);
    }
}