Swap Two Number without Using Third Variable in cpp

Write a Program to Swap Two Number without Using Third Variable in Cpp.

Working

• Make Two Variable First,Second.
• Get Value from user.
• Display Number Before Swap
• Addition First Number & Second Number Move to First Number ( First = First + Second )
• Subtract Second Number From First Number Move to Second ( Second = First – Second )
• Subtract Second Number From First Number Move to First ( First = First – Second )
• Display Number After Swap

Program

//Swap Two without Third Variable Number in CPP
#include<iostream.h>
#include<conio.h>
void main(){
clrscr();
int first_num=0,second_num=0;
cout<<"\n Swap Two Number without using Third Variable";
cout<<"\n -------------------------------- ";
cout<<"\n Enter the First Number : ";
cin>>first_num;
cout<<"\n Enter the Second Number : ";
cin>>second_num;
//Before Swap
cout<<"\n Before Swap First Number : "<<first_num<<" Second Number : "<<second_num;
//Swap Process
first_num = first_num + second_num;
second_num = first_num - second_num;
first_num = first_num - second_num;
//after Swap
cout<<"\n After Swap First Number : "<<first_num<<" Second Number : "<<second_num;
getch();
}

Output / Result