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Tip of the Day
Home » Tip Bank » C++
Language: C++
Expertise: Beginner
Aug 19, 2002

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Executing a Member Function After main() Terminates


You can execute any member function or any other execution after a termination of main() function by using "#pragma exit."

Here's the syntax:
 
	#pragma exit <function_name /*with no parenthesis*/> [priority] //without
semicolon

Now, here's an example:
 
#include<iostream.h>
class CL{
public:	//A constructor
	CL(){	cout << "\nThe object is creating"; }
	void obj_func() { cout << "\nThis is a _
function of object"; }
};
void func_after_main ();
#pragma exit func_after_main 64   // setting a _
function to execute after
the main termination
void main ()
{  cout << "\nThis is main() ";
}
void func_after_main() {
	cout << "\nThis is func_after_main() ";
	CL obj1;	//creating an object, and _
calling its constructor
	obj1.obj_func();	//calling an _
object's member function
}

In defining such functions, the functions should not carry any attribute nor return any value. They should be defined before the #pragma statement.

Priority is optional. It is ranging from 64 to 100 (recomended).
  • 0—Highest priority used by C Libraries.
  • 63—Lowest priority used by C Libraries.
  • 64—First available Priority.
  • 100—Default priority.
  • 255—Lowest priority.
Jawad Akhtar
 
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