CPP (11th chapter)

1.

operator>> (Std::istream &is, Complex_c &t) {    std::cout<<" ";     is >>t.x;    Std::cout<<"";     is >>t.y;     return  is ;}

If the parameter const Complex_c & T, there will be infinite dead loops, and, well, your fish will be fine. The const can't change the value of the class. and want to change, fish

2.

Complex_c::complex_c (double n,double  m) {    x= n;    Y= m;} Complex_c complex_c::operator+ (const complex_c &t)const{     return complex_c (x+ t.x, y+ t.y);} Complex_c complex_c::operator+ (const complex_c &t)const{     return (x+ t.x, y+ t.y);}

No constructor name returns the rightmost result y+ t.y with the comma operator, and then calls the constructor Complex_c (y+ t.y,double m) m to the default value when defined

CPP (chapter 11th)