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This article will explain in detail what is the difference between return, exit and abort in C language. The content of the article is of high quality, so Xiaobian shares it with you as a reference. I hope you have a certain understanding of relevant knowledge after reading this article.

In general, in C, you exit a program with return, if in the main function, return calls the exit function after cleaning up local objects.

In contrast to return, exit does not destroy local objects, but all static and global objects, empties buffers, and closes IO channels. The function defined by atexit() is called before termination.

atexit is also in stdlib.h and its declarative formula is

int atexit(void (*func)(void))

When the program terminates, the function pointer func is called.

//atexit.c#include #include void funcA (){ printf("call from atexit\n");}int main (){ atexit(funcA); //Register funcA as an abort function printf("exiting...\ n"); return 0;}

The test results are as follows:

>gcc atexit.c

>a.exe

exiting...

call from atexit

If you want to exit the program without doing anything, you can use abort () to insert abort(); before return 0, and the output will be as follows, without calling funcA.

>a.exe

exiting...

What is the difference between return, exit and abort in C language? I hope the above content can be of some help to everyone and learn more. If you think the article is good, you can share it so that more people can see it.

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