'operator' : logical operation on address of string constant
Using the operator with the address of a string literal produces unexpected code.
Example
char *pc; pc = "Hello"; if (pc == "Hello") { }
The if statement compares the value stored in the pointer pc
to the address of the string "Hello", which is allocated separately each time the string occurs in code. The if statement does not compare the string pointed to by pc
with the string "Hello".
To compare strings, use the strcmp function.