error: no matching function for call to ‘ope::ope()

Question

 #include <iostream>
        using namespace std;
        class ope
        {
            private: int real, imag;
            public:
            ope(int r, int i){
                    real=r;
                    imag=i;
         }
        ope operator + (ope const &obj) //operator overloading
            {   ope temp;
                temp.imag = imag + obj.imag;
                temp.real = real + obj.real;
                return temp;
            }
            void show()
            {
                cout << "Result : " << real << " + i"  << imag << endl;//print complex numbers
            }
        };
        int main()
        {
            ope f1(2,5) , f2(7,6);
            ope f3 = f1+f2;
            f3.show();
        return 0;
        }

我是编程新手，我尝试使用运算符重载但出现此错误有人可以帮助我吗？在此代码中，我尝试使用运算符重载来打印复数。

Answer 1

行

ope temp;

需要一个无参构造函数（a.k.a默认构造函数），但是ope只有一个需要两个参数的构造函数。你不妨在这里使用参数化构造函数：

ope operator + (ope const &obj) //operator overloading
{   
    ope temp(real + obj.real, imag + obj.imag);

    return temp;
}

... 或定义默认构造函数

class ope {
// ...
public:
  ope(): real(0), imag(0) {}
// ...

error: no matching function for call to ‘ope::ope()

error: no matching function for call to ‘ope::ope()

c++

oop

operator-overloading