#function call

Every C++ program has at least one function, which is main(), and all the most trivial programs can define additional functions. A function is a group of statements that together perform a task. The code of your program can be divided into many separate sub-functions. How the division takes place is entirely up to you, but logically the division usually is such that each function performs a…

Testing & Code Generation: Generate function call permutations based on arguments

Hello all, i’m kinda busy the last 2 years in a big home project which is evolving every day. New features are added, more web services written, more complicated database queries are formed…and after 2 years, this small baby has grown to a 17K lines of code distributed in more than 150 files.When i started it, i asked myself, “Should i write tests?” and after 0 seconds later i ofc took the…

Structure parameter corrupted on function call

I’m having trouble tracking down the cause of strange behavior in passing a structure as a parameter.

The structure in question, structFoo, has the following declaration:

typedef struct _structFoo { int id; BSTR szDescription; VARIANT vData; BOOL bTransient; } structFoo;

I have two modules, A and B. Module A calls B::foo( int id, uint filter, structFoo sF ). In A, before the…

Let me start by saying who taught you C/C++ forgot to tell you call by value and call by pointer is same.

If you know about it good others please stop calling me crazy. Call by pointers is another name for call by value on pointers. Just think about if a language provides you call by value, and pointers to access memory locations and given that you want to implement a function which modifies its arguments you will arrive at same result, just without a fancy name. You will pass address which does call by value to copy of address variable and the changed value in that address is retained, because you are not changing the address. I would just like to pass constant pointer.

Yup I too realized it, when I was in my freshman year. It was a aha moment, and thought late Ritchie make a april fool of us by coining that term. 

So the question boils down to call by reference vs call by value.

So we all know. Call by reference will go an extra step in copying the argument value in stack to their original calling functions local address.

So in the link in the section of "The calle's action before ending" there will be some write-ups to local function values before an exit.