直角坐标系转化为极坐标系 请问一下代码哪里出错了

Question

1.定义Point类：

定义设置函数Set，设置坐标x，y

定义分别取x，y轴坐标分量的函数xOffset与yOffset

定义点的极坐标函数angle与极坐标半径函数radius，分别实现极坐标和极坐标半径转换

2.主函数实现：

定义Point类对象p

键盘输入并设置对象p的坐标x=1，y=2

输出对象p的极坐标和极坐标半径

输出对象p的的直角坐标分量

#include<bits/stdc++.h>
using namespace std;
class point{
    int x,y;
public:
void set(double a,double b){
    x=a;
    y=b;
} 
void xoffset(double a){
cout<<"x offset="<<a<<",";}
void yoffset(double b){
cout<<"y offset="<<b;
}
void angle(double a,double b){
    double c=atan2(b,a);
    cout<<"angle="<<c<<",";
}
void radius(double a,double b){
    double c=sqrt(a*a+b*b);
    cout<<"radius="<<c<<","; 
}
};
int main(){
    double c,d;
    cin>>c>>d;
    point p;
    p.set(c,d);
    p.angle(c,d);
    p.radius(c,d);
    p.xoffset(c);
    p.yoffset(d);
}

Answer 1

#include <iostream>
#include <cmath>

using namespace std;

class Point
{
    double _x = 0.0;
    double _y = 0.0;

public:
    void Set(double x, double y)
    {
        _x = x;
        _y = y;
    }

    double xOffset() const
    {
        return _x;
    }

    double yOffset() const
    {
        return _y;
    }

    double angle() const
    {
        double theta;
        if (abs(_x) > abs(_y))
            theta = atan(_y / _x);
        else
            theta = M_PI / 2.0 - abs(atan(_x / _y));
        if (_x < 0.0 && _y > 0.0)
            theta = M_PI - theta;
        else if (_x < 0.0 && _y < 0.0)
            theta += M_PI;
        else if (_x > 0.0 && _y < 0.0)
            theta = 2.0 * M_PI - theta;
        return theta;
    }

    double radius() const
    {
        return sqrt(_x * _x + _y * _y);
    }
};

int main()
{
    double x, y;
    cin >> x >> y;
    Point p;
    p.Set(x, y);
    cout << "angle=" << p.angle() << ", radius=" << p.radius() << endl;
    cout << "xOffset=" << p.xOffset() << ", yOffset=" << p.yOffset() << endl;
    return 0;
}