Question

Whats wrong with my code shown below? please somebody throw some light. Thanks for your time !

    #include<iostream.h>
      using namespace std;

     struct mydata{
        int mx;
        mydata(int x = 0){}
        mydata operator+(const mydata& rhs){

                mydata temp(rhs);
                return temp;
        }
        operator int() const{ return mx; }
        operator double() const{ return mx; }
};


int main(){
        mydata d;
        mydata r = d + 5; // L1
        5 + d; // L2
        d + d; // L3
}

Answer 1

The problem (stated the comment) is that compiler doesn’t know which + you want to execute:

(double)d + 5

or

(int)d + 5

In order to resolve this ambiguoity, you should point the type conversion, or replace one of these operators by a named function:

    operator int() const{ return mx; }
    operator double() const{ return mx; }

If you want instead use d + mydata(5) you should write so, because the above variants are more likely to be applied