Swapping two variable value without using 3rd variable

Posted by Muhammad Akhtar on Stack Overflow See other posts from Stack Overflow or by Muhammad Akhtar
Published on 2009-12-01T13:22:21Z Indexed on 2010/04/03 0:53 UTC
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General

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interview-questions

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logical

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c++

One of the very tricky question asked in an interview...

we need to swap the values of two variables like a=10 and b=15

Generaly to swap two variables values, we need 3rd variable like..

temp=a
a=b
b=temp

Now the requirement is, swaping value of two variable values without using 3rd variable?

How can be accopmplish this?

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