Program Ape's---C language details 22 (function return pointer considerations < dangling pointer >, view the amount of memory the process can allocate)

Source: Internet
Author: User
Main content: function return pointer considerations < dangling pointer >, viewing the amount of memory the process can allocate

#include <stdio.h> char * favorite_fruit () {static char fruit[] = "Apple";  Without static, this function also returns the pointer as well as dangling, because when the function exits the fruit group number is destroyed                                //Added static after the fruit array is allocated in the data segment, not the stack, the lifetime is as long as the program, the function exits the variable//is still valid return fruit;} int main () {char *a = favorite_fruit ();p rintf ("%s\n", a);/* * See how much memory your process can allocate  *  Total allocated memory depends on the system configuration of  */int MB = 0; while (malloc (1 <<)) ++kb;  printf ("Allocated%d KB total\n", KB); return 0;}

Output:


Program Ape's---C language details 22 (function return pointer considerations < dangling pointer >, view the amount of memory the process can allocate)

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.