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  • C中sizeof()的用法——32位和64位下的sizeof()

    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

     所有指针都是占8字节

     

    ——————————————————————————

     

     

     

    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

    所有指针都是占4字节

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  • 原文地址:https://www.cnblogs.com/sara-gcj/p/3324187.html
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