Question

How to overload prefix ++ operator in C++

Answer 1

#include <iostream>

class Example {
public: 
    int a;

    Example() {} 
  
    Example(int a) { 
        this->a = a;
    }
  
    Example& operator++() { // ++ prefix
        ++a; 
        
        return *this; 
    }
};
  
int main() {
    Example obj(7);

    ++obj;
  
    std::cout << obj.a;
}




/*
run:

8

*/

 

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