Refreshing my memory of C I/O against FB's take on FizzBuzz

hiphop.c

// Solution to https://www.facebook.com/careers/puzzles.php?puzzle_id=7

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

int main(int argc, char *argv[]) {
	int x, y;
	
	if (argc == 1) {
		printf("Filename argument required\n");
		exit(1);
	}
	
	freopen(argv[1], "r", stdin);
	scanf("%d", &x);
		
	for(y = 1; y <=x; y++) {
		if (y % 3 == 0 && y % 5 == 0) { printf("Hop\n"); }
		else if (y % 3 == 0) { printf("Hoppity\n"); }
		else if(y % 5 == 0) { printf("Hophop\n"); }
	}
}

this should have been done using HipHop.

Why's that?

Just because of what it prints. Hop, Hoppity, Hophop. If it was done using HipHop, it'd be Hip Hoppity HopHop, which sounds funny as hell.