C语言问题

#include <stdio.h>
 
union number {
    int i;
    float f;
} n1, n2, n3, n4;
 
int main(int argc, char* argv[]) {
    n1.i = n2.i = 0xffff0000;
    n3.i = n4.i = 0x0000ffff;
    if(n1.f == n2.f) printf("USTC");        
    if(n3.f == n4.f) printf("SSE");
    return 0;
}