C/C++中sizeof()的用法——32位和64位下的sizeof()

2018-01-24 10:31:07来源:网络收集作者:纳米程序员人点击

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[var1]


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



 



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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



所有指针都是占4字节

sizeof()用法汇总

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