why there is run time error - stack overflow

[nhfk]

Hi all,

i went over some code and i was trying to figure out why it cause run time error of stack overflow.
attached the code:

class opOverload{
public:
            bool operator==(opOverload temp);
};
 
bool opOverload::operator==(opOverload temp){
            if(*this  == temp ){
                        cout<<"The both are same objects\n";
                        return true;
            }
            else{
                        cout<<"The both are different\n";
                        return false;
            }
}
 
void main(){
            opOverload a1, a2;
            a1= =a2;
}

i thought that when i execute the second line in main function, it calls to "==" function of opOverload class (overload function) and makes compare.

but when i ran it , it got into infinite loop until overflow.
WHY?

Thank you!

[vlad from moscow]

In this statement

if(*this == temp ){

you are recursively calling the operator. Each time when it is called it creates in stack local variable temp.

[vlad from moscow]

I'd like to appent that it would be more clear that this statement

if(*this == temp ){

is equivalent to

if ( ( *this ).operator ==( temp ) ){

[vlad from moscow]

By the way main shall be declared as

int main()