Two Points Revisited

Two Points Revisited

向量旋转90度

#include <iostream>
#include <stdio.h>
#include <stdlib.h>
using namespace std;

struct Point{  
    int x, y;  
};

void Swap(Point& t1, Point& t2) {
    int temp = t1.x;
    t1.x = t2.x;
    t2.x = temp;
    temp = t1.y;
    t1.y = t2.y;
    t2.y = temp;
}

int main(){  
    int s, tt, cases = 0;  
    Point a1, b1, a2, b2;  
    scanf("%d", &tt);  
    while(tt--){
        cases++;
        scanf("%d %d %d %d", &a1.x, &a1.y, &a2.x, &a2.y);  
        if (a1.x > a2.x) swap(a1,a2);  
        int dy = abs(a1.y-a2.y);
        int dx = abs(a1.x-a2.x);
        b1.x = 0;
        b2.x = dy;
        if(a1.y < a2.y) {
            b1.y = dx;
            b2.y = 0;
        } else {
            b1.y = 0;
            b2.y = dx;
        }
        printf("Case %d: %d %d %d %d\n", cases, b1.x, b1.y, b2.x, b2.y);
    }
}