C语言中sizeof（）求字节数的应用举例

本文尽可能多的测试了在Win32平台下用sizeof（）求各种类型变量字节数的结果，而且会不断更新。很有参考价值哦！ sizeof（char）=1
sizeof（short）=2
sizeof（int）=4
sizeof（long）=4
sizeof（float）=4
sizeof（double）=8
sizeof（long double）=8

sizeof（unsigned char）=1
sizeof（unsigned short）=2
sizeof（unsigned int）=4
sizeof（unsigned long）=4
sizeof（unsigned float）=4
sizeof（unsigned double）=4
sizeof（unsigned long double）=8
char a[] = {"a","b","c","d","e"};//sizeof（a）=5
char b[] = "abcde";//sizeof（b）=6
char c[][3] = {{"a","b","c"},{"d","e","f"},{"g","h","i"},{"j","k","l"}};
//sizeof（c）=12
//sizeof（c[0]）=3
//sizeof（c[0][0]）=1
char d[][5] = {"abcc","deff","ghii","jkll"};
//sizeof（d）=20
//sizeof（d[0]）=5
//sizeof（d[0][0]）=1
char *p = 0;//sizeof（p）=4
char *q = （char *）malloc（5）;//sizeof（q）=4
char *r = "abcde";//sizeof（r）=4
char （*f）（void） = NULL;//sizeof（f）=4

char *s1[3] = {"aa","bb","cc"};
//sizeof（s1）=12
//sizeof（s1[0]）=4
//sizeof（*s1[0]）=1

char *s2[3][3] = {{"aa","bb","cc"},{"aa","bb","cc"},{"aa","bb","cc"}};
//sizeof（s2）=36
//sizeof（s2[0]）=12
//sizeof（*s2[0]）=4

char h[3][3] = {{1,2,3},{4,5,6},{7,8,9}};
char （*ph）[3] = h;
//sizeof（ph）=4
//sizeof（*ph）=3
//sizeof（ph[0]）=3
//sizeof（*ph[0]）=1C++ Primer Plus 第6版中文版清晰有书签PDF+源代码 http://www.linuxidc.com/Linux/2014-05/101227.htm读C++ Primer 之构造函数陷阱 http://www.linuxidc.com/Linux/2011-08/40176.htm读C++ Primer 之智能指针 http://www.linuxidc.com/Linux/2011-08/40177.htm读C++ Primer 之句柄类 http://www.linuxidc.com/Linux/2011-08/40175.htm将C语言梳理一下，分布在以下10个章节中：

Linux-C成长之路（一）：Linux下C编程概要 http://www.linuxidc.com/Linux/2014-05/101242.htm
Linux-C成长之路（二）：基本数据类型 http://www.linuxidc.com/Linux/2014-05/101242p2.htm
Linux-C成长之路（三）：基本IO函数操作 http://www.linuxidc.com/Linux/2014-05/101242p3.htm
Linux-C成长之路（四）：运算符 http://www.linuxidc.com/Linux/2014-05/101242p4.htm
Linux-C成长之路（五）：控制流 http://www.linuxidc.com/Linux/2014-05/101242p5.htm
Linux-C成长之路（六）：函数要义 http://www.linuxidc.com/Linux/2014-05/101242p6.htm
Linux-C成长之路（七）：数组与指针 http://www.linuxidc.com/Linux/2014-05/101242p7.htm
Linux-C成长之路（八）：存储类，动态内存 http://www.linuxidc.com/Linux/2014-05/101242p8.htm
Linux-C成长之路（九）：复合数据类型 http://www.linuxidc.com/Linux/2014-05/101242p9.htm
Linux-C成长之路（十）：其他高级议题

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