typecast-operator - w3toppers.com

C++ floating point to integer type conversions

What you are looking for is ‘type casting’. typecasting (putting the type you know you want in brackets) tells the compiler you know what you are doing and are cool with it. The old way that is inherited from C is as follows. float var_a = 9.99; int var_b = (int)var_a; If you had only … Read more

Implementation of sizeof operator

The result of pointer subtraction is in elements and not in bytes. Thus the first expression evaluates to 1 by definition. This aside, you really ought to use parentheses in macros: #define my_sizeof(x) ((&x + 1) – &x) #define my_sizeof(x) ((char *)(&x + 1) – (char *)&x) Otherwise attempting to use my_sizeof() in an expression … Read more