Can anybody explain me use of ^= assignment operator in C i need detailed explanation?

The ^ operation is exclusive or operation. It is defined in the following table.





value1 value2 result


0 0 0


0 1 1


1 0 1


1 1 0





So you see, it is value1 OR value2 but not value1 AND value 2





This is a bitwise operation.





The ^= operation works the same as the +=, -=, *=, etc operations.





a ^= b is equivalent to a = a ^ b





One cool thing about exclusive or is that it is reversible





if


x = a ^ b;


and


y = x ^ b;


then


y == a





Likewise, if


z = x ^ a


then


z == a





So you can use this to do things like store two pointers in a doubly-linked list in one location, for example, by exclusive-oring them together, at the cost, of course, of extra computation to reconstitute the originals. You can also use it to do a kind of cheap, low quality encryption, if you just want to obscure some data from prying eyes.

Can anybody explain me use of ^= assignment operator in C i need detailed explanation?
In C, ^ is the exclusive or (XOR) operator. Several operators including ^ and + can be placed immediately before the =. This means perform the operation and then the assignment. So for example


x ^= y ;


is shorthand for


x = x ^ y ;
Reply:Caret symbol is used for bitwise XOR.


so a^b will be bitwise XOR of the variables a and b.


When you use the grammar you mentioned the result of the bitwise XOR operation will be stored in the left hand side variable. For example:


a ^= b


is equal to a = a ^ b





Example:


Say a=1001 and b=0101 then:


a ^= b will have the same result as:


a = a ^ b = 1001 ^ 0101 = 1100
Reply:Hope this helps:





To declare a variable, use the following syntax:





data_type variable_name;











ex. To declare a variable called price that can be a real number:





float price;











To assign a value to variable, use the following syntax:





variable_name = value;











You can declare more than one variable on the same line and you can initialize a variable at the same time you declare it.











ex. int number, quantity;





float price = 5.25;