机器平台：X86_64 处理器
操作系统：Red Hat 4.1.2-14
编译器： gcc version 4.1.2 20070626
Size of char is: 1
Size of unsigned char is: 1
Size of signed char is: 1
Size of int is: 4
Size of short is: 2
Size of long is: 8
Size of long int is: 8
Size of signed int is: 4
Size of unsigned int is: 4
Size of unsigned long int is: 8
Size of long long int is: 8
Size of unsigned long long is: 8
Size of float is: 4
Size of double is: 8
Size of long double is: 16
Size of (void *) is: 8
Size of (char *) is: 8
Size of (int *) is: 8
Size of (long *) is: 8
Size of (long long *) is: 8
Size of (float *) is: 8
Size of (double *) is: 8
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机器平台： X86_32 处理器
操作系统： Windows XP SP2
编译器： VS2005自带的C++编译器
Size of char is: 1
Size of unsigned char is: 1
Size of signed char is: 1
Size of int is: 4
Size of short is: 2
Size of long is: 4
Size of long int is: 4
Size of signed int is: 4
Size of unsigned int is: 4
Size of unsigned long int is: 4
Size of long long int is: 8
Size of unsigned long long is: 8
Size of float is: 4
Size of double is: 8
Size of long double is: 8
Size of (void *) is: 4
Size of (char *) is: 4
Size of (int *) is: 4
Size of (long *) is: 4
Size of (long long *) is: 4
Size of (float *) is: 4
Size of (double *) is: 4
参考二：
表格形式：32位机器下面
| 数据类型 | 说明 | 字节数 | 取值范围 |
| bool | 布尔型 | 1 | true,false |
| char | 字符型 | 1 | -128～127 |
| unsigned char | 无符号字符型 | 1 | 0～255 |
| short | 短整型 | 2 | -32768～32767 |
| unsigned short | 无符号短整型 | 2 | 0～65535 |
| int | 整型 | 4 | -2147483648～2147483647 |
| unsigned | 无符号整型 | 4 | 0～4294967295 |
| long | 长整型 | 4 | -2147483648～2147483647 |
| unsigned long | 无符号长整型 | 4 | 0～4294967295 |
| float | 单精度型 | 4 | -3.4×10-38～3.4×10-38 |
| double | 双精度型 | 8 | -1.7×10-308～1.7×10-308 |
| long double | 长双精度型 | 8 | -1.7×10-308～1.7×10-308 |