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])=1

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