//char*数组 转换成 int*数组 和int* 类型 测试
#include "stdafx.h"
char* keyword[] ={"if","for","while","switch"};
int* intpk[] ={(int*)keyword,(int*)keyword[0],(int*)keyword[1],(int*)keyword[2],(int*)keyword[3]};
int main(int argc, char* argv[])
{
char x = 'A';
char* px = &x;
char arr[]={'c','h','i','n','a',' '};
int* intkey=(int*)keyword;
printf("%s
",arr);
printf("%X %s %s %s %s
",keyword,*(keyword),*(keyword+1),*(keyword+2),*(keyword+3));
printf("%s
",*(intkey));
printf("%X %s %s %s %s
",*(intpk),*(intpk+1),*(intpk+2),*(intpk+3),*(intpk+3));
return 0;
}
--------------------------------------------------------------------------------------
查看汇编编译：
…
0040B848 mov byte ptr [ebp-4],41h
0040B84C lea eax,[ebp-4]
0040B84F mov dword ptr [ebp-8],eax
0040B852 mov byte ptr [ebp-10h],63h
0040B856 mov byte ptr [ebp-0Fh],68h
0040B85A mov byte ptr [ebp-0Eh],69h
0040B85E mov byte ptr [ebp-0Dh],6Eh
0040B862 mov byte ptr [ebp-0Ch],61h
0040B866 mov byte ptr [ebp-0Bh],0
0040B86A mov dword ptr [ebp-14h],offset keyword (00423428) //keyword 实际存储位置：423428
0040B871 lea ecx,[ebp-10h]
0040B874 push ecx
0040B875 push offset string "%s
" (00420f3c)
0040B87A call printf (00401180)
0040B87F add esp,8
0040B882 mov edx,dword ptr [keyword+0Ch (00423434)]
0040B888 push edx
0040B889 mov eax,[keyword+8 (00423430)]
0040B88E push eax
0040B88F mov ecx,dword ptr [keyword+4 (0042342c)]
0040B895 push ecx
0040B896 mov edx,dword ptr [keyword (00423428)]
0040B89C push edx
0040B89D push offset keyword (00423428)
0040B8A2 push offset string "%s %s %s %s
" (00420f9c)
0040B8A7 call printf (00401180)
0040B8AC add esp,18h
0040B8AF mov eax,dword ptr [ebp-14h]
0040B8B2 mov ecx,dword ptr [eax]
0040B8B4 push ecx
0040B8B5 push offset string "%s " (00420034)
0040B8BA call printf (00401180)
0040B8BF add esp,8
0040B8C2 mov edx,dword ptr [intpk+0Ch (00423444)]
0040B8C8 push edx
0040B8C9 mov eax,[intpk+0Ch (00423444)]
0040B8CE push eax
0040B8CF mov ecx,dword ptr [intpk+8 (00423440)]
0040B8D5 push ecx
0040B8D6 mov edx,dword ptr [intpk+4 (0042343c)]
0040B8DC push edx
0040B8DD mov eax,[intpk (00423438)]
0040B8E2 push eax
0040B8E3 push offset string "%X %s %s %s %s
" (00420fac)
0040B8E8 call printf (00401180)
0040B8ED add esp,18h
0040B8F0 xor eax,eax
…
--------------------------------------------------------------------------------------
打印结果：
china
423428 if for while switch
if
423428 if for while while
--------------------------------------------------------------------------------------
C编译器总结 ：
1、各种指针类型 之间可以转换，但需要强制转换—>int* intpk[] ={(int*)keyword,(int*)keyword[0],(int*)keyword[1],(int*)keyword[2],(int*)keyword[3]};
2、指针可以+- 操作，步长为4个字节
3、*在变量的左边为取值（取值类型可以看成是 ：例如 int* –* = int，int** – * = int*)
4、字符型数组，可以看成是字符型指针类型char*；但有区别本例没有展示出来。
5、&变量 来赋值 可以不用强制类型