求大佬指点下为什么一直提示axisx，axisy not declared么？

Question

#include<iostream>
#include<Cmath>
using namespace std;

class CPoint
{
public:
    CPoint(double xx=0,double yy=0);
    double Distance1(CPoint p) const;
    double Distance0() const;
    void SymmetricAxis(char style) const;
    void input();
    void output();
private:
    double x,y;
};
CPoint::CPoint(double xx,double yy):x(xx),y(yy){}
double CPoint::Distance1(CPoint p) const
{
    return sqrt((p.x-x)*(p.x-x)+(p.y-y)*(p.y-y));
}
double CPoint::Distance0() const
{
    return sqrt(x*x+y*y);
}
void CPoint::SymmetricAxis(char style) const
{
    double a,b;
    switch(style)
    {
    case axisx:
    {
        a=x,b=-y;
    }
    break;
    case axisy:
    {
        a=-x,b=y;
    }
    break;
    case point:
    {
        a=-x,b=-y;
    }
    break;
    }
    cout<<"("<<a<<","<<b<<")"<<endl;
}
void CPoint::input()
{
    char c;
    cout<<"请输入坐标(形式:x,y):";
    cin>>x>>c>>y;
    if(c!=',')
    {
        cout<<"输入错误"<<endl;
    }
}
void CPoint::output()
{
    cout<<"输入的坐标为:"<<"("<<x<<","<<y<<")"<<endl;
}
int main()
{
    CPoint CP;
    CP.input();
    CPoint cp(1,1);
    CP.output();
    cout<<"该点到p点的距离为:"<<CP.Distance1(cp)<<endl;
    cout<<"该点到原点的距离为:"<<CP.Distance0()<<endl;
    cout<<"style的类型（symmetricX按x轴对称,symmetricY按y轴对称,symmetricO按原点轴对称）"<<endl;
    cout<<"该点关于x轴对称的点为:"<<CP.SymmetricAxis(axisx)<<endl;
    cout<<"该点关于y轴对称的点为:"<<CP.SymmetricAxis(axisy)<<endl;
    cout<<"该点关于o点对称的点为:"<<CP.SymmetricAxis(point)<<endl;
    return 0;
}
 

Answer 1

你代码中axisx，axisy，point都没有定义。

可以把他们定义成宏或者全局变量

#define axisx  'x';

#define axisy  'y';

#define point  '.'