Tuesday, 3 March 2015

C++Program To Swap A Number Without Using Third Variable

Problem :- Write A Program To Swap A Number Without Using Third Variable

Logic :- Swapping A two Number without Using Third Variable Is A simple logic that i am Explaining below .

Example :- a=10 And b=20 .

Step 1:- first add both number like a=a+b so a value is 30.

Step 2:- Now sub-struct b=a-b so b value is 10.

Step 3:- Finally a=a-b so 30-10=20 so a value is 20.

finally Number is swap .

Solution :-

#include <iostream>
using namespace std;

int main()
{
    int first,second;
    
cout<<"Enter The First And Second Variable :\n\n";
    cin>>first>>second;
    
first=first+second;
    second=first-second;
    first=first-second;
    
cout<<"\nFirst Number is = "<<first<<"\nSecond Number Is = "<<second<<endl;
    return 0;

}

Output:-

C++Program To Swap A Number Without Using Third Variable

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