Question

I need the solutn of dis progm...plz help...
write a prgm in C or C++ 4r swaping 2 variable's value without using any temporary variable...

Answer 1

use array

Answer 2

@thangeram can u post d prgm here...

Answer 3

sry my array method is not giving me satisfying output bt u can try this
a = a + b;
b = a - b;
a = a - b;

Answer 4

If they hold different (integral) values, use the following swap.
template<typename T> inline void swap(T &l, T &r) { l ^= r; r ^= l; l ^= r; }
Why don't you just use std::swap?

Answer 5

You need to be very careful using the methods above.

You may introduce a bug that causes some values to work and others to fail (this is due to overflow).

I believe xor is safer than addition in this case.

Answer 6

thanks for reply...

Answer 7

The XOR will not cause overflow.