reference to 'distance' is ambiguous

Question

While compiling the following code i am getting the error as

reference to 'distance' is ambiguous

    #include<iostream>
using namespace std;
class distance
{
    int feet,inches;
    distance():feet(0),inches(0)
    {

    }
    distance(int f,int i):feet(f),inches(i)
    {
    }

    void show()

    {
        cout<<"feet  "<<feet;
        cout<<endl<<"inches   "<<inches;
    }

    distance operator + (distance) ;
};

distance distance::operator + (distance d)
{
    int f,i;
    f=feet+d.feet;
    i=inches+d.inches;
    return distance(f,i);
}

int main()
{
    distance d1;
    distance d2(2,3),d3(7,5);;
d1=d2+d3;
d1.show();
}

can anyone help me with the error. And provide me the solution and as to why i am getting this error.

Is this your real code? Currently, the `distance` constructor is private. — James Adkison, Feb 23 '16 at 18:35
Your `distance` is ambiguous because of `using namespace std;`, there is `std::distance` function. Never do this. — vladon, Feb 23 '16 at 18:37

score 14 · Answer 1 · edited May 23 '17 at 12:15

14

And this is why using namespace std; should not be used. Your class distance is clashing with the standard function std::distance. Get rid of the using namespace std; and if you are going to be using a standard component use std::name_of_thing every time you use it or you can use using std::name_of_thing.

edited May 23 '17 at 12:15

Community

1
1

answered Feb 23 '16 at 18:35

NathanOliver

171,901
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shafeen · Answer 2 · 2016-02-23T18:40:20.367

1

Your class name is clashing with another symbol from the namespace, changing your class name to something else like Distance would be one possible solution.

edited Feb 23 '16 at 18:40

answered Feb 23 '16 at 18:36

shafeen

2,431
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I'd argue that removing `using namespace std;` is a better fix. – James Adkison Feb 23 '16 at 18:38
Well, whatever the argument for the fix is (and yes, I would tend to agree with you here), identifying the problem is probably more important here – shafeen Feb 23 '16 at 18:39

reference to 'distance' is ambiguous

2 Answers2