Loop Basic

#include<iostream.h>
//#include<stdio.h>
#include<fstream.h>
#include<stdlib.h>
#include<conio.h>
void main()
{
 int a, b, c, sum;
 clrscr();
 //printf("Enter 2 integers to add:""\n");
 cout<<"Enter 2 integers to add:""\n";
 cin>>a>>b;

 //Summation calculation starts.
  c=a+b;
  cout<<"The sum of "<<a<<" and "<<b<<" is "<<c<<"."<<endl;
  b=c-a;
  cout<<"Subtraction from "<<c<<" to "<<a<<" is "<<b<<endl;
  a=c-b;
 //End of summation calc...


  cout<<"The sum of "<<a<<" and "<<c<<" is "<<b<<"."<<endl;
  cout<<"The sum of "<<b<<" and "<<c<<" is "<<a<<"."<<endl;

 getch();
}