Revise paste 2nd SEMESTER HW4 NUM 1

#include <iostream>
#include <cmath>
#include <stdlib.h>
#include <unistd.h>
using namespace std;

class Fraction{
	int numer, denom;
	int find_gcd(int a, int b){
		return a==0?b:find_gcd(b%a, a);
	}
	public:
		void setNum(int num){
			numer = num;
		}
		void setDen(int num){
			denom = num;
		}
		int getNum(){
			return numer;
		}
		int getDen(){
			return denom;
		}
		Fraction operator +(const Fraction& fr){
			Fraction f;
			if(this->denom!=fr.denom){
				f.setDen(this->denom*fr.denom);
				f.setNum(this->numer*fr.denom + this->denom*fr.numer);
			}else{
				f.setDen(this->denom);
				f.setNum(this->numer+fr.numer);
			}
			f.reduce_fraction();
			return f;
		}
		Fraction operator -(const Fraction& fr){
			Fraction f;
			if(this->denom!=fr.denom){
				f.setDen(this->denom*fr.denom);
				f.setNum(this->numer*fr.denom - this->denom*fr.numer);
			}else{
				f.setDen(this->denom);
				f.setNum(this->numer-fr.numer);
			}
			f.reduce_fraction();
			return f;
		}
		Fraction operator *(const Fraction& fr){
			Fraction f;
			f.setNum(this->numer*fr.numer);
			f.setDen(this->denom*fr.denom);
			f.reduce_fraction();
			return f;
		}
		Fraction operator /(const Fraction& fr){
			Fraction f;
			f.setNum(this->numer*fr.denom);
			f.setDen(this->denom*fr.numer);
			f.reduce_fraction();
			return f;
		}
		Fraction operator %(const Fraction& fr){
			Fraction f;
			if(this->denom!=fr.denom){
				f.setDen(this->denom*fr.denom);
				f.setNum(this->numer*fr.denom % this->denom*fr.numer);
			}else{
				f.setDen(this->denom);
				f.setNum(this->numer%fr.numer);
			}
			f.reduce_fraction();
			return f;	
		}
		void power(int power){ 
			this->numer = pow(this->numer,power);
			this->denom = pow(this->denom,power);
 			this->reduce_fraction();
		}
		void reduce_fraction(){
			int gcd = find_gcd(numer, denom);
			this->numer/=gcd;
			this->denom/=gcd;
		}
		void print_fraction(){
			if(numer==denom){
				cout << numer << endl;
			}else{
				cout << numer << "/" << denom << endl;
			}
		}
};

void printMenu(){
	system("cls");
	cout << "1. Addition (+)" << endl;
	cout << "2. Substraction (-)" << endl;
	cout << "3. Multiplication (*)" << endl;
	cout << "4. Division (/)" << endl;
	cout << "5. Modulo (%)" << endl;
	cout << "6. Fraction to the power n" << endl;
	cout << "7. Exit" << endl;
	cout << "Enter the operation: " << endl;
}

void getFraction(Fraction& first, Fraction& second){
	int temp;
	cout << "Enter first fraction numerator and denominator" << endl;
	cin >> temp; first.setNum(temp);
	cin >> temp; first.setDen(temp);
	cout <<	"Enter the second fraction numerator and denominator" << endl;
	cin >> temp; second.setNum(temp);
	cin >> temp; second.setDen(temp);	
}

int main(){
	Fraction first, second, result;
	int input, temp, p;
	do{
		printMenu();
		cin >> input;
		switch(input){
			case 1:
				getFraction(first, second);
				result = first+second;
				break;
			case 2:
				getFraction(first, second);
				result = first-second;
				break;
			case 3:
				getFraction(first, second);
			 	result = first*second;
			 	break;
			case 4:
				getFraction(first, second);
				result = first/second;
				break;
			case 5:
				getFraction(first, second);
				result = first%second;
				break;
			case 6:
				cout << "Enter fraction numerator and denominator" << endl;
				cin >> temp; result.setNum(temp);
				cin >> temp; result.setDen(temp);
				cout << "Enter the power (integer): ";
				cin >> p;
				result.power(p);
				break;
			case 7:
				cout << "Exiting...";
				exit(0);
				break;
			default:
				cout << "Only 1 - 6 allowed! Restarting..." << endl;
				sleep(1);
				continue;
		}
		cout << "Result : ";
		result.print_fraction();
		cout << endl;
		system("pause");
	}while(true);
	return 0;
}