博客
关于我
为什么存在动态内存分配,动态内存函数(malloc函数,free函数,calloc函数,realloc函数)
阅读量:111 次
发布时间:2019-02-26

本文共 1396 字,大约阅读时间需要 4 分钟。

??????

1. ??????

???????????????????????????????????????????????

  • ????????
  • ????????

?????????????????????????????

2. ?????????

?????????????

  • ??????????????????
  • ?????????????????

????????????

  • ??????????????????????

3. ????????

3.1 malloc??
  • ?????????????????
  • ???????????
  • ????????????????NULL
  • ???????
3.2 free??
  • ???????????
  • ????p????????????
  • ??p?NULL??????
  • ??????????????
3.3 ??????
??1???10?????????
#include 
#include
int main() { int *p = (int *)malloc(10 * sizeof(int)); if (p == NULL) { printf("??????\n"); } else { for (int i = 0; i < 10; i++) { p[i] = i; } for (int i = 0; i < 10; i++) { printf("%d ", p[i]); } free(p); p = NULL; } return 0;}
??2?????????
#include 
#include
int main() { int *p = (int *)malloc(INT_MAX); if (p == NULL) { printf("??????\n"); printf("????%s\n", strerror(errno)); } else { for (int i = 0; i < 10; i++) { p[i] = i; } for (int i = 0; i < 10; i++) { printf("%d ", p[i]); } free(p); p = NULL; } return 0;}
3.4 calloc??
  • ?num????size?????????????0
  • ?????????
  • ?malloc????????????0
3.5 realloc??
  • ???????????
  • ??????NULL
  • ????????
  • ????????????
  • ???????????????????

4. ??????

  • ??????????????????
  • ????????????????
  • ????????????????
  • ??realloc???????????????

转载地址:http://kpdz.baihongyu.com/

你可能感兴趣的文章
nodejs 运行CMD命令
查看>>
nodejs-mime类型
查看>>
nodejs中Express 路由统一设置缓存的小技巧
查看>>
nodejs图片转换字节保存
查看>>
NodeJs学习笔记001--npm换源
查看>>
nodejs配置express服务器,运行自动打开浏览器
查看>>
Node入门之创建第一个HelloNode
查看>>
Node出错导致运行崩溃的解决方案
查看>>
Node提示:error code Z_BUF_ERROR,error error -5,error zlib:unexpected end of file
查看>>
NOIp2005 过河
查看>>
NOPI读取Excel
查看>>
NoSQL&MongoDB
查看>>
NotImplementedError: Cannot copy out of meta tensor; no data! Please use torch.nn.Module.to_empty()
查看>>
npm install报错,证书验证失败unable to get local issuer certificate
查看>>
npm run build 失败Compiler server unexpectedly exited with code: null and signal: SIGBUS
查看>>
npm run build报Cannot find module错误的解决方法
查看>>
npm run build部署到云服务器中的Nginx(图文配置)
查看>>
npm start运行了什么
查看>>
npm WARN deprecated core-js@2.6.12 core-js@<3.3 is no longer maintained and not recommended for usa
查看>>
npm入门,这篇就够了
查看>>