Thread: Question about class

I am stuck over these for hours. Plz help.

1.There are 3 files here: fraction.h - class definition , fraction.cpp - member functions & main.cpp- main function. How to link fraction.cpp with fraction.h? Does it need to link fraction.cpp with main.cpp also? How? Actually I tried to link them. I am not sure what I have done.

2.There are 2 errors in Fraction.cpp. It is specified in the code. It said missing ; before string .That's weird. It doesn't have any string. I can't get it. How to fix them?And I am sure every { matches with } there.How come there is unexpected file end?

3. I wrote a function- add(Fraction num) to get the numerator & denominator of (num1+num2) so that it is called in this way:
ans = num1;
ans.add(num2);
Does it have problem?

This is a simplified version of my code:
header:

Code:

class Fraction
{
public:
	Fraction(int numer1, int denom1);
	Fraction();
	void display();
	void add(Fraction num);

private:
	int denom,numer;
	void reduce();
}

Fraction.cpp

Code:

#include "Fraction.h"
#include <iostream>
using namespace std;
Fraction::Fraction(int numer1, int denom1)
{
	numer=numer1;
	denom=denom1;
}
Fraction::Fraction()
{
	numer=0;
	denom=0;
}
void Fraction::display()
{
	cout<<numer<<"/"<<denom;
}
void Fraction::reduce()
{
	int x;
	if (numer>denom)
	{
		for(x=denom;x>1;x--)
		{
			if ((numer%x==0) && (denom%x==0))
			{
				numer=numer/x;
				denom=denom/x;break;
			
                        }//syntax error : missing ';' before 'string'
                         //fatal error C1004: unexpected end of file found
		}
	}
	if (numer<denom)
	{
		for(x=numer;x>1;x--)
		{
			if ((numer%x==0) && (denom%x==0))
			{
				numer=numer/x;
				denom=denom/x;break;
			}
		}
	}
}
void add(Fraction num)
{
	numer=numer+num.numer;
	denom=denom+num.denom;
	reduce();
}

main.cpp

Code:

#include "fraction.h"
#include <iostream>
using namespace std;

void main()
{
	int numerator, denominator;
	Fraction num1, num2, ans;

	cout << "Input a fraction (a/b): ";
	cin >> numerator >> denominator;
	num1 = Fraction(numerator, denominator);

	cout << "Input another fraction (a/b): ";
	cin >> numerator >> denominator;
	num2 = Fraction(numerator, denominator);

	// addition
	ans = num1;
	ans.add(num2);
	num1.display();
	cout << " + ";
	num2.display();
	cout << " = ";
	ans.display();
	cout << endl;
}