Calling a Function Before Program's Startup

Certain applications need to invoke startup functions that run before the main program starts. For example, polling, billing, and logger functions must be invoked before the actual program begins. The easiest way to achieve this is by calling these functions from a constructor of a global object. Because global objects are conceptually constructed before the program's outset, these functions will run before main() starts.
For example:

Code:

class Logger
 {
 public:
 Logger()
 {
 activate_log();
 }
 };
 Logger log; /*global instance*/
 int main()
 {
 record * prec=read_log();
 //.. application code
 }
 

The global object log is constructed before main() starts. During its construction, log invokes the function activate_log(). Thus, when main() starts, it can read data from the log file.

 

Yeah! that's a good idea too!

 

How do implement a static function. Is it by static function name. I don't understand the concept of static.

Thanks for your help.

Your help is greatly appreciated by me and others.

 

I not fully understand the concept of static. The static variable is exist even though the function has exit.

The static function pnly can call locally. I don't know this is correct concept. Please correct me if i misunderstand the concept.

Thanks ofr oyur help.


Your help is greatly appreciated by me and others.

 

I don't get what u mean. Sorry for my stupidness.

Thanks for oyur help.

Your help is greatly appreciated by me and others.

 

I don't understand the text in quote.

Thanks for oyur help.

 

Why not use #pragma startup. This would run the function specified to run before main.

 

what is #pragma startup. I know this related to header file but what is it ?
Thanks for your explanation.

Your help is greatly appreciated by me and others.