How to swap two variables without using third variable and in a single line without using + , -?

Answer 1

Here it is:

a=(a=a*b)/(b=a/b)

OM NAMAH SHIVAY

Answer 2

If you knew the values were, for example, 8 bits you could say:
B = B << 8, B = A & B, A = B >> 8, B & '0000000011111111';

Of course this would only work for A & B values < 256.
Maybe not too helpful...

Never mind, that XOR thing looks pretty good.

Answer 3

Using what Programming Language?

Answer 4

can't be done in one line as far as I know, there is a really cool trick to swaping with binary, but i don't think that would work for your purpose.

if you could do it in 3 lines this code works:

a = a * b
b = a / b
a = a / b

Answer 5

Using assembler:

xchg a,b

Answer 6

I suppose you could do it with two pointers in C

Just reassign each pointer to the other location

Answer 7

You can use XOR.

http://en.wikipedia.org/wiki/XOR_swap_algorithm

Answer 8

using the bitwise xor operator.

a^=b^=a^=b;

In detail, they are 4 statements

a=a^b;
b=b^a;
a=a^b;

Answer 9

I HAVE NO IDEA.......