第三题测试没问题，但一提交错误，有没有大佬能救救

#include <bits/stdc++.h>

using namespace std;

class coordinate {
    public:
    int x;
    int y;
    long int z;
    coordinate(int a, int b, int c):x(a),y(b),z(c) {};//构析
    coordinate() {};
    void m_gcd() {
        while (gcd(gcd(x,y), z) != 1) {
            x=x/gcd(gcd(x,y), z);
            y=y/gcd(gcd(x,y), z);
            z=z/gcd(gcd(x,y), z);
        };//化简用函数
    }
};

int main() {
    int n;
    long int h;
    cin >> n >>h;
    coordinate point[n];
    for (int i = 0; i < n; i++) {
        cin >> point[i].x >> point[i].y >> point[i].z;
    };//录入数据
    for (int i = 0; i < n; i++) {
        coordinate temp(point[i].x,point[i].y,2*h-point[i].z);//这是在水面上对应的点
        temp.m_gcd();//进行化简
        point[i]=temp;//方便输出，现在的point【i】实际上是指向的方向
    };
    for (int i = 0; i < n; i++) {
        cout << point[i].x << " " << point[i].y << " " << point[i].z <<" "<< endl;
    };
    return 0;
}