#include "stdafx.h"
#include <iostream>

using namespace std;

class  distance {
	int feet;
	float inches;
public :
	distance ():feet(0),inches(0)
	{};
	distance(float in,int ft): feet(ft),inches(in)
	{};
void getdist()
{cout<<"enter the values of feeet and inches ";
cin>> feet>>inches;}
void showdist()
{cout<<"feet= "<<feet<<"\n inches="<<inches;}
 
 distance add_dis(distance);};   

 distance distance::add_dis(distance d2) 
{ distance temp;

temp.inches= inches+d2.inches;

if(temp.inches>=12.0)

temp.inches-= 12.0;
 temp.feet=1;
 temp.feet+=feet+d2.feet;
 return temp;
}



int _tmain(int argc, _TCHAR* argv[])
{




	distance d1,d3;
	distance d2(5,2.3);

    d1.getdist();

	d3=d1.add_dis(d2);

    d1.showdist();
	d2.showdist();





	return 0;
}

the errors are as follows

1>------ Rebuild All started: Project: muqeet3, Configuration: Debug Win32 ------
1>Deleting intermediate and output files for project 'muqeet3', configuration 'Debug|Win32'
1>Compiling...
1>stdafx.cpp
1>Compiling...
1>muqeet3.cpp
1>c:\users\muqeet\documents\visual studio 2005\projects\muqeet3\muqeet3\muqeet3.cpp(25) : error C2872: 'distance' : ambiguous symbol
1>        could be 'c:\users\muqeet\documents\visual studio 2005\projects\muqeet3\muqeet3\muqeet3.cpp(9) : distance'
1>        or 'c:\program files (x86)\microsoft visual studio 8\vc\include\xutility(1652) : iterator_traits<_Iter>::difference_type std::distance(_InIt,_InIt)'
1>c:\users\muqeet\documents\visual studio 2005\projects\muqeet3\muqeet3\muqeet3.cpp(46) : error C2872: 'distance' : ambiguous symbol
1>        could be 'c:\users\muqeet\documents\visual studio 2005\projects\muqeet3\muqeet3\muqeet3.cpp(9) : distance'
1>        or 'c:\program files (x86)\microsoft visual studio 8\vc\include\xutility(1652) : iterator_traits<_Iter>::difference_type std::distance(_InIt,_InIt)'
1>c:\users\muqeet\documents\visual studio 2005\projects\muqeet3\muqeet3\muqeet3.cpp(47) : error C2872: 'distance' : ambiguous symbol
1>        could be 'c:\users\muqeet\documents\visual studio 2005\projects\muqeet3\muqeet3\muqeet3.cpp(9) : distance'
1>        or 'c:\program files (x86)\microsoft visual studio 8\vc\include\xutility(1652) : iterator_traits<_Iter>::difference_type std::distance(_InIt,_InIt)'
1>c:\users\muqeet\documents\visual studio 2005\projects\muqeet3\muqeet3\muqeet3.cpp(47) : warning C4244: 'argument' : conversion from 'double' to 'int', possible loss of data
1>Build log was saved at "file://c:\Users\muqeet\Documents\Visual Studio 2005\Projects\muqeet3\muqeet3\Debug\BuildLog.htm"
1>muqeet3 - 3 error(s), 1 warning(s)
========== Rebuild All: 0 succeeded, 1 failed, 0 skipped ==========

You see where you put using namespace std; ?

By doing that, you included a whole lot of already defined functions and classes. One of those is called distance, so you have defined distance twice.

This is exactly why slapping using namespace std; on the top of everything without understanding what it means is dangerous.

So, either remove using namespace std;, or rename your distance class.

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