sizeof(p) //p=array, p=malloc, p=pointer, p=const

SybaseLU

1. 
   
2. char* p1 = NULL;
   
3. char* p2 = "hello";
   
4. char* p3[] = {"abcdef", "hijklmn"};
   
5. char   p4[10];
   
6. char* p5 = (char*)malloc(100);
   
7. char p6[10]= {"hello"};  
   
8. 
   
9. suppose the sizeof char is 1 byte in advance.
   
10. 
    
11. ? sizeof(p1)/p2/p3/p4/p5/p6
    
12. 
    

复制代码

[ 本帖最后由 SybaseLU 于 2007-11-15 16:58 编辑 ]

SybaseLU

my answer of the above are the following:
p1 = 4
p2 = 4
p3 = 8
p4 = 10
p5 = 4
p6 = 10

safedead

depend on platform

my system:

sizeof(p1) = 8
sizeof(p2) = 8
sizeof(p3) = 16
sizeof(p4) = 10
sizeof(p5) = 8
sizeof(p6) = 80

foolishx

楼上的是不是64BIT OS？

我也同意二楼给出的答案，但是对于LS的难结果，有些想法。

SybaseLU

ok, regardness of the sizeof of  pointer which depend on platform. yes, It is very results that I wanna. thank you very much.

[ 本帖最后由 SybaseLU 于 2007-11-15 17:02 编辑 ]

ypxing

问题的关键在于
你要明白,你要求的是指针的大小还是数组的大小

liu1061

老A指出了这个问题的KeyPoint! 呵呵，只知道值没有多大意思！

cugb_cat

数组也是一种数据类型。