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Answer Posted / rajeshwar raja
Swap(int* a, int* b)
{
(*a) ^= (*b) ^= (*a) ^= (*b);
}
Explanation:
Expressions are evaluated from right to left.
Take the right most operation (*a) ^= (*b), its is short
hand XOR operation between 'a' and 'b'.
Assume a = 2 and b = 3.
a = 2 ^ 3 = 1
Next operation (*b) ^= (*a),
b = 3 ^ 1 = 2 (Note a is 1 now) ***(b is 2)***
Next operation (*a) ^= (*b)
a = 1 ^ 2 = 3 (Note b is 2 now) ***(a is 3)***
SWAPPED!!!
It can swap complex data structures also.
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