fizzbuzz.c

#include <stdio.h>
int main(void) {
    int i;
    for (i = 1; i <= 100; i++) {
        if (i % 3 == 0 && i % 5 == 0) {
            printf("FizzBuzz\n");
        } else if (i % 3 == 0) {
            printf("Fizz\n");
        } else if (i % 5 == 0) {
            printf("Buzz\n");
        } else {
            printf("%d\n", i);
        }
    }
    return 0;
}

Rakefile

# coding: utf-8

CC = "gcc"

desc "clang fizzbuzz"

task :default => "fizzbuzz"

file "fizzbuzz" => "fizzbuzz.o" do
  sh "#{CC} -o fizzbuzz fizzbuzz.o"
end

file "fizzbuzz.o" => "fizzbuzz.c" do
  sh "#{CC} -c fizzbuzz.c"
end