typecast-operator

I have tried implementing the sizeof operator.. I have done in this way.. #define my_sizeof(x) ((&x + 1) - &x) But it always ended up in giving the result as '1' for either of the data type.. I have then googled it for this.. and i found the code typecasted #define my_size(x) ((char *)(&x + 1) - (char *)&x) And the code is working if it is typecasted.. I dont understand why.. This code is also PADDING a STRUCTURE perfectly.. It is also working for #define my_sizeof(x) (unsigned int)(&x + 1) - (unsigned int)(&x) Can anyone please explain how is it working if typecasted and if not typecasted?

What are the different techniques used to convert float type of data to integer in C++? #include<iostream> using namespace std; struct database { int id,age; float salary; }; int main() { struct database employee; employee.id=1; employee.age=23; employee.salary=45678.90; /* How can i print this value as an integer (with out changing the salary data type in the declaration part) ? */ cout<<endl<<employee.id<<endl<<employee.age<<endl<<employee.salary<<endl; return 0; } thecoshman What you are looking for is 'type casting'. typecasting (putting the type you know you want in brackets) tells the