int main(void){
char *s[4] = { " 　","Fizz","Buzz","FizzBuzz"};
int i, j;
for (i=1;1<=100;i++){
j=(i%5==0)<<1+(i%3==0);
if(j==0)
sprintf(s[0],"%d",i);
puts(s[j]);
}
}

Segmentation fault