Interchange Two Numbers Without Temp in C++

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Q. Write a C++ program to interchange the value of two variable without using third variable.

#include <iostream>     
using namespace std;
  
int main()
{    
	int x, y;
	cout << "Enter two numbers: ";
	cin >> x >> y;
	cout << "Before interchange(swapping) the numbers x= " << x << " y= "  << y << endl;
	x=x+y;
    y=x-y;
    x=x-y;
	cout << "After interchange(swapping) the numbers x= " << x << " y= "  << y << endl;
    return 0;
}
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Q. Write an algorithm to interchange the value of two variable without using third variable.

1. Start
2. Input the values of `x` and `y` from the user.
3. Display the values of `x` and `y` before swapping.
4. Swap the values:
   - Set `x` to `x + y`
   - Set `y` to `x - y` (which is original `x`)
   - Set `x` to `x - y` (which is original `y`)
5. Display the values of `x` and `y` after swapping.
6. End
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