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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

How I can print to stderr in C?

The syntax is almost the same as printf. With printf you give the string format and its contents i.e.:

printf("my %s has %d chars\n", "string format", 30);

With fprintf it is the same, except now you are also specifying the place to print to:

File *myFile;
...
fprintf( myFile, "my %s has %d chars\n", "string format", 30);

Or in your case:

fprintf( stderr, "my %s has %d chars\n", "string format", 30);

Ref : https://bit.ly/3v5U8Zq