用代码检查Windows程序的位数

方法就是通过读取程序文件的头部来判断，具体代码如下：

 1 #include <stdio.h> 
 2 #include <windows.h>
 3 
 4 int CrnGetImageFileMachine(LPCSTR lpFileName) 
 5 { 
 6     IMAGE_DOS_HEADER idh={0}; 
 7     FILE *f = fopen(lpFileName, "rb"); 
 8     fread(&idh, sizeof(idh), 1, f); 
 9     IMAGE_FILE_HEADER ifh; 
10     fseek(f, idh.e_lfanew + 4, SEEK_SET); 
11     fread(&ifh, sizeof(ifh), 1, f); 
12     fclose(f); 
13     return ifh.Machine; 
14 } 
15 
16 int main(int c,char** v)
17 {
18     if(c != 2)
19     {
20         printf("usage: %s exepath/dllpath
",v[0]);
21         getchar();
22         return 0;
23     }
24     printf("你查看的文件是: %s
",v[1]);
25     printf("它的位数是:");
26     int n = CrnGetImageFileMachine(v[1]); 
27     if (n == 0x014C) 
28         printf("x86"); 
29     else if (n == 0x0200) 
30         printf("IA64"); 
31     else if (n == 0x8664) 
32         printf("x64"); 
33     else 
34         printf("Unknown");
35     
36     printf("
");
37     getchar();
38     return 0;
39 }