数据类型指定变量可以存储的数据的类型，例如：整数，浮点，字符等。文章源自菜鸟学院-https://www.cainiaoxueyuan.com/ymba/6369.html
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C语言中有4种类型的数据类型。文章源自菜鸟学院-https://www.cainiaoxueyuan.com/ymba/6369.html
| 类型 | 包含的类型 |
|---|---|
| 基本数据类型(Basic Data Type) | int, char, float, double |
| 派生数据类型(Derived Data Type) | array, pointer, structure, union |
| 枚举数据类型(Enumeration Data Type) | enum |
| Void数据类型(void Data Type) | void |
基本数据类型
基本数据类型是基于整数和基于浮点数。C语言支持有符号和无符号文字。文章源自菜鸟学院-https://www.cainiaoxueyuan.com/ymba/6369.html
基本数据类型的内存大小可能会根据32位或64位操作系统而有所变化。文章源自菜鸟学院-https://www.cainiaoxueyuan.com/ymba/6369.html
下面来看看看基本的数据类型，下面是根据32位机器的架构给出的大小范围。文章源自菜鸟学院-https://www.cainiaoxueyuan.com/ymba/6369.html
| 数据类型 | 内存大小 | 范围 |
|---|---|---|
| char | 1 byte | 1−128 to 127 |
| signed char | 1 byte | −128 to 127 |
| unsigned char | 1 byte | 0 to 255 |
| short | 2 byte | −32,768 to 32,767 |
| signed short | 2 byte | −32,768 to 32,767 |
| unsigned short | 2 byte | 0 to 65,535 |
| int | 2 byte | −32,768 to 32,767 |
| signed int | 2 byte | −32,768 to 32,767 |
| unsigned int | 2 byte | 0 to 65,535 |
| short int | 2 byte | −32,768 to 32,767 |
| signed short int | 2 byte | −32,768 to 32,767 |
| unsigned short int | 2 byte | 0 to 65,535 |
| long int | 4 byte | -2,147,483,648 to 2,147,483,647 |
| signed long int | 4 byte | -2,147,483,648 to 2,147,483,647 |
| unsigned long int | 4 byte | 0 to 4,294,967,295 |
| float | 4 byte | - |
| double | 8 byte | - |
| long double | 10 byte |