class Complex //Definitiong of class complex { public: Complex(double r=0,double i=0) { cout<<"Constructor"<<endl; mRel = r; mImag = i;} //constructor Complex(Complex& c) { mRel = c.mRel; mImag = c.mImag; cout<<"Copy constructor"<<endl; } friend Complex operator +(Complex c1,Complex c2); friend Complex operator -(Complex c1,Complex c2); void Display(); //Output complex //~Complex(){ cout <<"Destructor"<<endl;} //********************** private: double mRel,mImag; }; void Complex::Display() { cout<<"("<<mRel<<" "<<mImag<<")"<<endl; } Complex operator +(Complex c1,Complex c2) { return Complex(c1.mRel + c2.mRel,c1.mImag + c2.mImag); } Complex operator -(Complex c1,Complex c2) { return Complex(c1.mRel - c2.mRel, c1.mImag - c2.mImag); } void main() { Complex c1(5,4),c2(2,10),c3; cout<<"c1="; c1.Display(); cout<<"c2="; c2.Display(); c3 = c1 - c2; cout<<"c3=c1-c2="; c3.Display(); c3 = c1 + c2; cout<<"c3=c1+c2="; c3.Display(); }

问题在附件里，请大家看看，很奇怪的！！！（附件说明：结果一是就这样运行的结果，结果二是把程序中有星号的注释行里，被注释掉的析构函数开，即加了个析构函数！）