ambiguity error in distance please look

Question

#include<iostream>
#include<cmath>
using namespace std;

class distance{

public:
int x, y;

friend void add(distance,distance);
distance(int t,int k){
x=t;
y=k;
}
void display(){
cout<<"The Point is : ("<<x<<","<<y<<")"<<endl;
}

};
void add(distance d1,distance d2){
int xd=(d2.x-d1.x);
int yd=(d2.y-d1.y);
int ans=sqrt(pow(xd,2)+pow(yd,2));
cout<<"The addition using distance formula is "<<ans<<endl;
}

int main(){
distance d(1,2);
d.display();

distance d(2,3);
d.display();
add(d,d1);

return 0;
}

Answer 1

I would first suggest you to choose a different name for the class, perhaps `Distance` makes a better name?

Why? first because naming convention suggests class names begin with uppercase alphabet

Second, because it triggers name conflict. Since your code assumes name resolution should refer `std` namespace ...

using namespace std;

Then `distance`- your class name, creates an ambiguity for the compiler, since it triggers name conflict with std::distance() function defined in header <iterator> https://en.cppreference.com/w/cpp/iterator/distance

You can avoid this by removing the `using namespace std;` line, and use `std::` prefix for anything that was defined in `std` namespace e.g. std::cout and std::endl, or you can rename your class, choice is yours ...

And I think the second instance in main() should be named <d1> - you have declared <d> twice, but looks like it was just a typo

Next time please, attach a code bit link instead of raw text code, easier to check, and allows line number reference.

Answer 2

Yup