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How to swap two variables, without using third variable ?
Answer Posted / bruce tuskey
Only the Xor answer (#2) is correct (in cases where the
variables are the same size). With all the other answers,
you could run into over/under flow problems.
A = 01111111
B = 01111101
A = A^B = 00000010
B = A^B = 01111111 (Original A)
A = A^B = 01111101 (Original B)
| Is This Answer Correct ? | 95 Yes | 21 No |
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