Question

I have made the following code:-

class A{
     bool bFlag[2];
public:
  A(){
      for(int  i = 0; i < 2; i++)
          bFlag[i] = false;
  }

  bool operator[](int r){ //i know how to assign value to R.H.S using operator[]
      if( r >= 0 || r < 2 ){
          bFlag[r] = true;
          return bFlag[r];
   }
   return false;        
  }   
};

int main(){
    A obj;
    bool x;
    x = obj[0]; //this i know
    //obj[1] = x; //how to do this is my doubt?
    return 0;
}

I dont know to set value to L.H.S using operator[].
Please guide me to how to set x value to obj[1]

Answer 1

Als is right, but here is an example:

class A{
private:
    int val[10];
public:
    A(){}
    int& operator[](int i) {
        return val[i];
    }
};

this makes in posible to do things like

A a;
a[2] = 2;

you should of course add the old method as well. to optimize for l-value to making it.

class A{
private:
    int val[10];
public:
    A(){}
    const int operator[](int i) const {
        return val[i];
    }
    int& operator[](int i) {
        return val[i];
    }
};