Friend function is not visible in the class

Question

I have the following code:

struct M {
    friend void f() {}
    M() {
        f(); // error: \'f\' was not declared in this scope
    }
};

int main() {
            


        

Answer 1

struct M {
    friend void f() {}
    M() {
        f(); // error: 'f' was not declared in this scope
    }
};

int main() {
    M m;
}

The above code works perfectly.(tried on DevC++) Also try not to define the function inside the class as it might not have a scope outside it i.e. in main(). In trying to call f() from main() you'll receive an error saying function doesn't exist. Therefore, define function outside classes using :: operator (if necessary) so that there is no problem accessing the function from anywhere. Access friend function defined in class