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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
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
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原文地址：http://www.cnblogs.com/daxiong225/p/4813133.html
