Question

write a program input 2 number swap them without third variable

Answer 1

hope you don't mind which programming language
here is the logic
let inputs be a and b
a=a+b
b=a-b
a=a-b
now the numbers will be swapped.

eg:
sample input
a=20
b=10
a=a+b /// now a=30,b=10
b=a-b /// now a=30,b=20
a=a-b /// now a=10, b=20

Answer 2

#include<iostream>
#include<conio.h>
using namespace std;
int main()
{
int a,b;
cout<< '' Enter the variable a'';
cin>>a;
cout<< '' Enter the variable b'';
cin>>b;
a=a+b;
b=a-b;
a=a-b;
cout<<''The numbers after swapping is"<<"a="<<a<<"b="<<b;
getch();
}





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