> For the complete documentation index, see [llms.txt](https://blog.mcyou.cc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://blog.mcyou.cc/c++-mei-ri-yi-ti/c-mei-ri-yi-ti-day-3-fan-er-sai.md).

# C每日一题 Day 3 理五的凡尔赛风气

***

lhy版权所有，禁止转载

### 知识点：逻辑运算符，布尔类，选择结构

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## 题目描述

数学成绩刚出但还没发布，4个理五班的同学都说自己考的差。于是他们决定按他们宣称的成绩从低到高站好，等老胡宣读他们的真实成绩。现在输入这4个同学的成绩（4个空格隔开的整数），如果他们的成绩依次递增，则输出“nb”，否则输出“烟雾弹！凡尔赛！”

## 输入

四个整数

## 输出

题目要求的字符串

## 输入输出样例

**输入**

```
150 129 139 145
```

**输出**

```
烟雾弹！凡尔赛！
```

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## 回答要求

* 附上你完成本程序的完整代码
* 说说if的作用。
* 你的代码是否非常复杂？如果是，请学习“逻辑运算符”。
* 讲讲各种逻辑运算符的作用。
* 对C++的拓展：c++中引入了新的一种类型字符串（string），尝试用String储存数据重新完成本题。（可能需要一些数组的知识，可以不做）

  c++中提供了一种新的基本数据类型，叫布尔类（或者逻辑类）。尝试在本题定义一个布尔变量，然后用它储存理五的同学是否凡尔赛。


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