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Language in C Interview Questions and Answers

Ques. How to write a swap( ) function which swaps the values of the variables using bitwise operators.

Ans. Here is the swap( ) function.
swap ( int *x, int *y )
{
*x ^= *y ;
*y ^= *x ;
*x ^= *y ;
}
The swap( ) function uses the bitwise XOR operator and does not require any temporary variable for swapping.
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