Question

How to use atexit() to call a function on normal program termination in C

Answer 1

#include <stdlib.h>
#include <stdio.h>
 
void f1()
{
    puts("run f1()");
}
 

int main(void)
{
    atexit(f1);
}
  


/*
run:
 
run f1()

*/

 

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Answer 2

#include <stdlib.h>
#include <stdio.h>
 
void f1()
{
    puts("run f1()");
}
void f2()
{
    puts("run f2()");
}

int main(void)
{
    atexit(f1);
    atexit(f2);
}
  


/*
run:
 
run f2()
run f1()

*/

 

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