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C Exercises: Set a function that will be executed on termination of a program

C Variable Type : Exercise-15 with Solution

Write a C program to set a function that will be executed on termination of a program.

Sample Solution:

C Code:

#include<stdio.h>
#include<stdlib.h>

void newFunctionOne (void)
	{
		puts (" Here is the message returning from newFunctionOne.");
	}
	void newFunctionTwo (void)
	{
		puts (" Here is the message returning from newFunctionTwo.");
	}
	int main ()
	{
		atexit (newFunctionOne);
		atexit (newFunctionTwo);
		puts ("\n This is the message from main function.");
		return 0;
	}

Sample Output:

 This is the message from main function.                                                                      
 Here is the message returning from newFunctionTwo.                                                           
 Here is the message returning from newFunctionOne

Flowchart:

C Exercises Flowchart: Set a function that will be executed on termination of a program

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C Programming: Tips of the Day

Static variable inside of a function in C

The scope of variable is where the variable name can be seen. Here, x is visible only inside function foo().

The lifetime of a variable is the period over which it exists. If x were defined without the keyword static, the lifetime would be from the entry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.

The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to be - over all future calls to foo().

Ref : https://bit.ly/3fOq7XP