open a buncha files

gistfile1.c

#include <stdio.h>

int main() {
    FILE *f[512];
    char name[512];
    int n;
    for (n=0; n<512; n++) {
        sprintf(name, "file%d", n);
        f[n] = fopen(name, "w");
        fprintf(f[n], "Hello, %d\n", n);
    }

    return 0;
}