题解 | #重载运算符#

#include <iostream>
#include <cmath>
#define PI 3.1415926535
using namespace std;

class Angle{
    public:
        int degree;

        Angle operator-(Angle &angle){
            Angle newangel;
            newangel.degree=this->degree-angle.degree;
            return newangel;
        }

        void printSinValue(){
            printf("%.2f\n",sin(degree*PI/180));
        }
};

int main() {
    int xnum,angle1,angle2;
    cin>>xnum;
    while (xnum>0) { // 注意 while 处理多个 case
        cin>>angle1>>angle2;
        Angle newangel1;
        Angle newangel2;
        Angle diffAngle3;
        newangel1.degree=angle1;
        newangel2.degree=angle2;
        diffAngle3=newangel1-newangel2;
        diffAngle3.printSinValue();
        xnum--;
    }
}
// 64 位输出请用 printf("%lld")