Thread: We can swap two numbers using Xor operator.

I was searching for how to swap two numbers without temporary variable. Then I came across this blogpost.

He used xor operator to swap. I was amazed to see it.
Here is his program

Code:

#include<stdio.h>
int main(int argc, char const *argv[]){
    int number1,number2; 
    printf("\nSwapping of two numbers in c\nEnter two numbers\n");
    scanf("%d%d",&number1,&number2);
    printf("Number 1: %d\nNumber 2: %d",number1,number2);
    //swapping
    number1=number1^number2;
    number2=number1^number2;
    number1=number1^number2;
    printf("\nAfter swapping");
    printf("\nNumber 1: %d\nNumber 2: %d\n",number1,number2);
    return 0;
}

> number1 ^= number2 ^= number1 ^= number2;
Not really...
Question 3.3b

> He used xor operator to swap. I was amazed to see it.
And if your data types are anything other than equal sized integers, you have to do it the proper way anyway.

You hung a spoon off the end of your nose - party trick for a 5-year old.