This programe is made for biggners in c++ to made programe efficently and hide your prevate data form the user of your programe.This programe is made with the use of this pointer and also use the operator overloading. I will share this programme with others to understand it.

```
//this programme will gives the addition,subtraction,multiplication and division with reduce fraction
//and it also tells u to select your own choice
#include<iostream>
#include<conio.h>
using namespace std;
class fraction
{
private://class attributes
int num;
int denum;
public://class behaviors
fraction()//constructor without parameters
{
num=denum=1;
}
fraction(int n,int m)//constructor with parameters
{
num=m;
denum=m;
}
void setnum (int );
int getnum();
void setdenum(int );
int getdenum();
//fraction add(fraction );
// word operator is pre-defined
fraction operator +(fraction );//operator overloadin for addition
//fraction sub(fraction );
fraction operator -(fraction );//operator overloading for subtraction
//fraction multi(fraction );
fraction operator *(fraction );//operator overloading for multiplication
//fraction div(fraction );
fraction operator /(fraction );//operator overloading for division
fraction display();//use to display the values
fraction reduce();//use to reduce the fraction
};
fraction result;//class object to save the result of numerator and dunumenator and to separate the data from the parameter's data which we pass to the
// ...functions
void fraction::setnum(int n)//set the value of numenator
{
num=n;
}
void fraction::setdenum(int m)//set value of denumenator
{
denum=m;
}
int fraction::getnum()//get the value of the numenator
{
return num;
}
int fraction::getdenum()//get the value of denumenator
{
return denum;
}
fraction fraction::operator +(fraction b)//the formula applied here on fractions a/b + c/d to solve them.
//The formula is ad + bc/bd
{
//fraction result;
result.num=(num*b.denum)+(b.num*denum);
result.denum=denum*b.denum;
}
fraction fraction::operator -(fraction b)//subtraction of fractions
{
result.num=(num*b.denum)-(b.num*denum);
result.denum=denum*b.denum;
}
fraction fraction::operator *(fraction b)//multiplication of fractions
{
result.num=(num*b.num);
result.denum=denum*b.denum;
}
fraction fraction::operator /(fraction b)//division of fraction is
{
result.num=(num*b.denum);
result.denum=denum*b.num;
}
fraction fraction::reduce()//here is the algo to reduce the resultant fraction and to check whether the fraction is reducable or not
{
//if(result.num>result.denum)
{
int small=result.denum;
for(int i=small;i>0;i--)
{
if((result.num%i==0)&&(result.denum%i==0))
{
result.num/=i;
result.denum/=i;
//cout<<"\nReduced fraction is "<<reducenum<<"/"<<reducedenum<<endl;
}
}
cout<<"\a\nReduced fraction is "<<result.num<<"/"<<result.denum<<endl;
}
}
fraction fraction::display()
{
int count=0;
for(int i=2;i<=100;i++)
{
if(result.num%i==0)
{
if(result.denum%i==0)
{
count++;
//cout<<"Fraction is reducable by :"<<i<<endl;
}
}
}
if(count>=1)
{
cout<<"\aFraction is reducable \n";
cout<<result.num<<"/"<<result.denum<<"\n";
}
else
{
cout<<"\aFraction is not reducable \n";
cout<<result.num<<"/"<<result.denum<<"\n";
}
}
int main()
{
int a,b,c,d,x;
fraction f1=fraction();
fraction f2=fraction();
cout<<"********************************************************************************"<<endl;
//cout<<"Enter only positive intigers\n";
cout<<"\tFraction 1:\n";
cout<<"\aEnter numenator ";
cin>>a;
cout<<"\aEnter denumenator ";
cin>>b;
cout<<"\tFraction 2:\n";
cout<<"\aEnter numenator ";
cin>>c;
cout<<"\aEnter denumenator ";
cin>>d;
cout<<"********************************************************************************"<<endl;
f1.setnum(a);
f1.setdenum(b);
f2.setnum(c);
f2.setdenum(d);
cout<<"\aIf you need Addition of fraction Enter :1 "<<endl;
cout<<"If you need Subtraction of fractions Enter :2\n";
cout<<"If you need Multiplication of fractions Enter :3\n";
cout<<"If you need Division of fractions Enter :4\n";
cin>>x;
cout<<"********************************************************************************\n";
if(x==1)
{
cout<<" Addition\n";
//f1.add(f2);
f1+f2;
f2.display();
f2.reduce();
}
if(x==2)
{
cout<<" Subtraction\n";
//f1.sub(f2);
f1-f2;
f2.display();
f2.reduce();
}
if(x==3)
{
cout<<" Multiplication\n";
//f1.multi(f2);
f1*f2;
f2.display();
f2.reduce();
}
if(x==4)
{
cout<<" Division\n";
//f1.div(f2);
f1/f2;
f2.display();
f2.reduce();
}
return 0;
}
```