I am having trouble removing the errors listed below please help

```
#include <iostream>
#include <fstream>
#include <cmath>
using namespace std;
class rational
{
public:
rational(int num, int den);
rational(int num);
rational();
int getnum();
int getden();
void input(istream& in);
void print(ostream& out);
bool less(rational r);
rational Add(rational r);
private:
int numerator;
int denomerator;
};
int rational::getnum()
{
return numerator;
}
int rational::getden()
{
return denomerator;
}
rational::rational(int num, int den)
{
numerator = num;
denomerator = den;
}
rational::rational(int num)
{
numerator = num;
denomerator = 1;
}
rational::rational()
{
numerator = 1;
denomerator = 1;
}
int rational::rational Add(rational r)
{
rational l;
int result;
int a = l.getnum();
int b = l.getden();
int c = r.getnum();
int d = r.getden();
result = ((a * d + b * c) / (b * d));
return result;
}
void rational::input(istream& in)
{
int numerator;
int denomerator;
char slash;
cin >> numerator >> slash >> denomerator;
return;
}
void rational::print(ostream& out)
{
cout<<numerator<<"/"<<denomerator;
}
int main()
{
int a, b, c, d;
cout << "Enter a numerator: " << endl;
cin >> a;
cout << "Enter a denominator: " << endl;
cin >> b;
cout << "Enter another numerator: " << endl;
cin >> c;
cout << "Enter another denominator: " << endl;
cin >> d;
rational num1(a, b);
rational num2(c, d);
num1.Add(num2);
num1.print(cout);
system("pause");
return 0;
}
```

(56): error C2146: syntax error : missing ';' before identifier 'Add'

(56): error C2761: '__ctor' : member function redeclaration not allowed