求指教下面程序的错误在哪

Question

#include "stdafx.h"
#include
#include

class complex
{
private:
double x,y,m,a,b,b2;

public:
complex(double xx=0,double yy=0){x=xx;y=yy;};
void Set1(double m){m=16*x*x+16*y*y;};
void Set2(double b2){b2=(-4*x+sqrt(m))/8;};
void Set3(double a){a=y/(2*sqrt(b2));};
void Set4(double b){b=sqrt(b2);};
void Show(){cout<<a<<"+"<<b<<"i";};

};

//int main(int argc, char* argv[])
int main()
{ complex z1(3,4);
z1.Show();

return 0;

}

Answer 1

个人感觉，你虽然构造了一个complex对象，但是后面的函数都没有调用，所以结果是未知的