表格预览
| 数据类型 | 16位操作系统(byte) | 32位操作系统(byte) | 64位操作系统(byte) | 取值范围 |
| char | 1 | 1 | 1 | -128 ~ 127 |
| unsigned char | 1 | 1 | 1 | 0 ~ 255 |
| short int / short | 2 | 2 | 2 | -32768~32767 |
| unsigned short | 2 | 2 | 2 | 0 ~ 65535 |
| int | 2 | 4 | 4 | -2147483648~2157483647 |
| unsigned int | 2 | 4 | 4 | 0~4294967295 |
| long int / long | 4 | 4 | 8 | -2147483648~2147483647 |
| unsigned long | 4 | 4 | 8 | 0~42294967295 |
| long long int / long long | 8 | 8 | 8 |
-9223372036854775808 |
| double | 8 | 8 | 8 | |
| float | 4 | 4 | 4 | |
| long double | 10/12 | 10/16 | 有效位10字节。32位为了对齐实际分配12字节；64位分配16字节 | |
| 指针 | 2 | 4 | 8 |