32位机和64位机下面各类型sizeof的大小

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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1true,falsechar字符型1-128～127unsigned char无符号字符型10～255short短整型2-32768～32767unsigned short无符号短整型20～65535int整型4-2147483648～2147483647unsigned无符号整型40～4294967295long长整型4-2147483648～2147483647unsigned long无符号长整型40～4294967295float单精度型4-3.4×10^-38～3.4×10^-38double双精度型8-1.7×10^-308～1.7×10^-308long double长双精度型8-1.7×10^-308～1.7×10^-308

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