Reduce Fractions Program (identifier not found)

Part of our assignment is to reduce two user inputted fractions so they are in their simplest form. The error messages I get mostly have to do with my "num" and "denom" for numerator and denomenator being undeclared identifiers, but there may be more. I'm kinda bad at C++. I'd really appreciate any help I can get.

Code:

`#include <iostream>`

#include <cstdlib>

using namespace std;

class Fraction

{

private:

int num;

int denom;

char something;

public:

Fraction() {}

void reduce();

friend istream operator>> (istream, Fraction);

friend ostream& operator<< (ostream&, const Fraction&);

};

Fraction::Fraction (int numerator, int denominator, char something)

{

num = numerator;

denom = denominator;

something = a;

}

void reduce()

{

int n, m, r, sign;

n = num;

m = denom;

if (num = 0)

{

denom = 1;

return;

}

else

{

sign = 1;

if (num < 0)

{

sign = -1;

num = -num;

}

if (denom < 0)

{

sign = -sign;

denom = -denom;

}

r = n % m;

while (r != 0){

n = m;

m = r;

r = n % m;

}

num = num * sign / m;

denom = denom * sign / m;

}

}

istream operator>> (istream input, int num, int denom, char something, Fraction& oneRatio)

{

input >> num >> something >> denom;

return input;

oneRatio.reduce();

}

ostream& operator<< (ostream& output, const Fraction& oneRatio)

{

output << oneRatio.num;

if (oneRatio.denom != 1)

output << "/" << oneRatio.denom;

return output;

}

int main()

{

Fraction fract_1, fract_2;

cin >> fract_1 >> fract_2;

cout << "The entered fraction, reduced is "<< fract_1 << endl

<< "The entered fraction, reduced is " << fract_2 << endl << endl;

return 0;

}

All of my errors concern the use of num and denom in the function reduce. When I set n=num and m=denom I get "undeclared identifier" and everytime I use num and denom for the rest of the function, I get "identifier not found, even with argument-dependent lookup"

I also get the error 'Fraction::Fraction(int,int,char)' : overloaded member function not found in 'Fraction' in the constructor