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2-6-第一个C++程序(ios)

  • 2026-06-29 15:30:51
2-6-第一个C++程序(ios)
所需软件：a-Shell
进入App Store，搜索并下载a-Shell
a-Shell（自带本地 Clang++ 编译器，不需要联网）
进入终端，用vim编写hello.cpp
示例：vim hello.cpp
按 i 进入编辑，编写第一个C++代码：
#include <iostream> 
int main() 
{     
std::cout << "大家请关注南雁鸣雪！" 
<< std::endl; 
return 0; 
}
按 ESC，输入 :wq 保存退出
编译运行（a-Shell 内置 clang++）
编译命令：clang++ hello.cpp -o nymx
运行命令：./nymx
显示结果为：大家请关注南雁鸣雪！
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  2. 运行时间 : 0.140196s [ 吞吐率：7.13req/s ] 内存消耗：4,361.27kb 文件加载：140
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  1. CONNECT:[ UseTime:0.000637s ] mysql:host=127.0.0.1;port=3306;dbname=c_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000833s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000305s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000290s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000490s ]
  6. SELECT * FROM `set` [ RunTime:0.000204s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000583s ]
  8. SELECT * FROM `article` WHERE `id` = 497248 LIMIT 1 [ RunTime:0.000772s ]
  9. UPDATE `article` SET `lasttime` = 1783114332 WHERE `id` = 497248 [ RunTime:0.010201s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000316s ]
  11. SELECT * FROM `article` WHERE `id` < 497248 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000484s ]
  12. SELECT * FROM `article` WHERE `id` > 497248 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000719s ]
  13. SELECT * FROM `article` WHERE `id` < 497248 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002048s ]
  14. SELECT * FROM `article` WHERE `id` < 497248 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000992s ]
  15. SELECT * FROM `article` WHERE `id` < 497248 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001352s ]
0.141786s