Use the 'this' pointer. : this « Class « C++ Tutorial

1. C++ Tutorial
2. Class
3. this

#include <iostream> 
using namespace std; 
 
class MyClass { 
  int i; 
public: 
  void setI(int val) { 
    this->i = val; 
  }  
  int getI() { 
    return this->i; 
  }  
} ; 
 
int main() 
{ 
  MyClass o; 
 
  o.setI(100); 
  cout << o.getI(); 
 
  return 0; 
}

100