sairate c34823a3bd docs(book): 添加现代 C++教程及相关代码
- 新增现代 C++ 教程的 Preface 章节,包括英文和中文版本
- 添加 C++ Primer 练习代码
- 新增 Learn C++ 教程的 C++ 开发简介章节
- 添加头文件解析文档
- 更新 mkdocs.yml,包含新教程的目录结构
- 修改项目设置,使用 Python 3.10环境
2025-07-06 14:46:58 +08:00

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C++

#include <iostream>
#include <vector>
#include <string>
using namespace std;
int main()
{
int g;
cout <<"请输入成绩:"<<endl;
cin >> g;
if (g < 0 || g > 100) {
cout << "该成绩不合法" <<endl;
return -1;
}
if(g == 100) {
cout << "等级成绩是:" << "A++" << endl;
return -1;
}
if(g < 60) {
cout << "等级成绩是:" << "F" << endl;
return -1;
}
int i = g /10;
int j = g % 10;
string score, level, finalGrade;
if(i == 9)
score = "A";
else if (i == 8)
score = "B";
else if (i == 7)
score = "C";
else
score = "D";
if (j > 7) {
level = "+";
}else if (j < 3) {
level = "-";
}else {
level = "";
}
finalGrade = score + level;
cout << "等级成绩是:" << finalGrade << endl;
return 0;
}