CODE SECTION : SWAP TWO NUMBERS USING THIRD VARIABLE IN C++

Code

#include<iostream>
#include<conio.h>
using namespace std;
int main()
{
int num1,num2;
cout<<"ENTER TWO NUMBERS \n";
cin>>num1>>num2;
cout<<"FIRST NUMBER = "<<num1<<"\n";
cout<<"SECOND NUMBER = "<<num2<<"\n";
num1=num1^num2;
num2=num1^num2;
num1=num1^num2;
cout<<"SO,AFTER SWAPPING :\n";
cout<<"FIRST NUMBER = "<<num1<<"\n";
cout<<"SECOND NUMBER = "<<num2<<"\n";
return 0;
}

Output

ENTER TWO NUMBERS 10 20
FIRST NUMBER = 10
SECOND NUMBER = 20
SO,AFTER SWAPPING :
FIRST NUMBER = 20
SECOND NUMBER = 10

What we did - Our Approach

In this problem,we are supposed to swap the values of two numbers using xor operation.Swapping means interchanging of values among variables,swapping using xor operation takes place in three processes :
Let us assume that num1=20 num2=10 so,

Process 1 : num1=num1^num2 num1=20^10 =&amp;amp;amp;amp;amp;gt; 30 Process 2 : num2=num1^num2 num2=30^10 =&amp;amp;amp;amp;amp;gt; 20 Process 3 : num1=num2^num1; num1=20^30 =&amp;amp;amp;amp;amp;gt; 10 Now num1=10 &amp;amp;amp;amp;amp;amp; num2=20 ,hence numbers are now swapped.

See this code in :

C

Java

Also see :

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CODE OF GEEKS

TO SWAP TWO NUMBERS USING XOR OPERATION IN C++

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