Q:

Swap two numbers without using a temporary variable?

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YasminRadwan26

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2022-06-25

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Swap two numbers without using a temporary variable?

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YasminRadwan26

2022-06-25

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Using the EX-OR operator, we can swap two numbers. Here the concept is that EX-OR of two same numbers is zero.

#include <stdio.h>
void SwapTwoNumber(int *a, int *b)
{
    if(*a == *b) // Check if the two addresses are same
        return;
    *a = *a ^ *b;
    *b = *a ^ *b;
    *a = *a ^ *b;
}
int main()
{
    int x = 10;
    int y = 20;
    SwapTwoNumber(&x, &y);
    printf("x = %d and y = %d",x,y);
    return 0;
}

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