How many temp variables are required to swap two numbers?

[sagar_dspt]

HAI , FRENDS EVERYONE IS AWARE OF SWAPPING TECHNIQUE.
CAN ANY ONE GIVES THE ANSWER FOR THIS QUES?
HOW MANY TEMP VARIABLES R REQUIRED TO SWAP TWO VARIABLES ?
A) 2
B) 1

C) 0
D) NONE

[sk_kireeti]

Sagar,

Refer the following threads which discussed same issue. You will get answer by yourself.

http://forums.sureshkumar.net/c-code...statement.html
swap 2 numbers without arithmatic operations, pointers & Temp
http://forums.sureshkumar.net/c-code...2-numbers.html
swapping two values
C language - How to swap the content oftwo variables without a temporary variable
http://forums.sureshkumar.net/c-code...-operator.html

Thanks,
Krishna