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【c++& python】编程 1 入门 Hello,Word

  • 2026-08-18 23:11:19
【c++& python】编程 1 入门 Hello,Word
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前   言

目前，编程作为当代重要的一种技能受到国家乃至全社会的关注，其中 python和 C++语言编程学习者越来越多，从本节我们再次学编程

01
 python和 C++

C++

先完整编译 → 生成机器码可执行文件 → 直接 CPU 运行

编译时全部语法、类型、内存错误提前检查，运行速度极快

不依赖额外虚拟机，直接操作内存、寄存器、CPU 指令

一次编译，可独立分发 exe / 二进制程序

Python

边解释边执行（CPython 先转字节码，虚拟机运行）

错误只有运行到对应代码才会暴露，无法提前校验

依赖 Python 解释器才能运行，不能直接生成独立原生机器码

有 GIL 全局解释器锁：同一时刻只有一个 CPU 线程执行 Python 代码，多线程计算性能受限

02
入门 Hello,World

 Hello,Word作为编程第一个程序。我们今天从这一个程序开始

03
Python
04
C++

#include<bits/stdc++.h> 

using namespace std ;

int main()

{

cout<<"Hello world"<<endl;

return 0;

}

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  1. CONNECT:[ UseTime:0.000927s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001711s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000614s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000691s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001314s ]
  6. SELECT * FROM `set` [ RunTime:0.000531s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001382s ]
  8. SELECT * FROM `article` WHERE `id` = 506864 LIMIT 1 [ RunTime:0.001311s ]
  9. UPDATE `article` SET `lasttime` = 1787324046 WHERE `id` = 506864 [ RunTime:0.056690s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000687s ]
  11. SELECT * FROM `article` WHERE `id` < 506864 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001267s ]
  12. SELECT * FROM `article` WHERE `id` > 506864 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001154s ]
  13. SELECT * FROM `article` WHERE `id` < 506864 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.007237s ]
  14. SELECT * FROM `article` WHERE `id` < 506864 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.027575s ]
  15. SELECT * FROM `article` WHERE `id` < 506864 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002155s ]
0.266531s