前言：
作为双非院校的一名大一新生，我也是第一次接触到蓝桥杯这个竞赛，也是怀着些忐忑心情写下这篇文章，也是我备战第十六届蓝桥杯C++组的伊始，不论结果怎样，我相信在这个过程我一定能够会成长许多。
一、第一个C++程序分析
1.第一个程序
代码语言：javascript
AI代码解释
#include<iostream> using namespace std; int main() { cout << "Hello World!" << endl; return 0; }2.main函数
main函数是一个程序的入口，C++的程序不管有多少代码，都是从main函数开始执行的，它也被叫做：主函数。main 前面的int 表示main函数执行结束时返回一个整型类型的值，所以在main函数的最后写return 0所以我们也可以总结为以下两点：1.main函数有且只有一个2.一个项目中可以有多个.cpp文件，但是只能有一个main函数(程序的入口只有一个)
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