Why am i getting this error?

[SlenderMan]

inc13.obj : error LNK2019: unresolved external symbol "public: __thiscall CDistance::CDistance(void)" (??0CDistance@@QAE@XZ) referenced in function _main

  #include <iostream>
#include <conio.h>
using namespace std;

class CDistance
{
private:
		int feet, inches;
public:
		CDistance();
		CDistance(int, int);
		~CDistance();
		void setDist();
		void printDist() const;
		int add(const CDistance&) const;
		int subtract(const CDistance&) const;
};

CDistance::CDistance(int f, int i)
{
	feet = f;
	inches = i;
}

CDistance::~CDistance() {}

void CDistance::setDist()
{
	cout << "Enter the distance. Feet then inches: ";
	cin >> feet >> inches;
}

void CDistance::printDist() const
{
	cout << "Feet: " << feet 
		 << "Inches: " << inches << endl;
}

int CDistance::add(const CDistance& total) const
{
	cout << feet + inches;
	return 0;
}

int CDistance::subtract(const CDistance& total) const
{
	cout << feet - inches;
	return 0;
}


int main()
{
	CDistance d1;

	d1.setDist();
	d1.printDist();
	_getch();
	return 0;
}

[pogrady]

because you declared it in the class constructor but never actually defined it :)

[SlenderMan]

I actually never defined what?

[rcast]

In main() - Look at the definition of the object being created. Try adding some arguments to that (look at the signature of the constructor)

CDistance(int, int);

// so use in main --->

CDistance d1(1,2);

Also if you want to overload the constructor, you must define both. You have only defined CDistance::CDistance(int f, int i) but declared and have not defined CDistance::CDistance();

CDistance::CDistance() {
	feet = 0;
	inches = 0;
}

CDistance::CDistance(int f, int i)
{
	feet = f;
	inches = i;
}

[SlenderMan]

I put this and now it runs. Thanks!

CDistance d1(0,0);