This is not about algorithms,but related to C programming.
How to implement sizeof operator?
macro for this
#define my_sizeof(a) (char*)(a+1)-(char*)a
this works fine of variables
int a;
printf(%d,my_sizeof(a)); //or even for user defined
structures
but it will not work for
As you already mentioned sizeof is an operator and not a lib fn.
Which means it will be evaluated/code for it will be replaced at compile
time rather than during execution.
It will follow the following grammar,
unary_operator: sizeof , and others
sizeof: ( unary expression | type_name)
and so
