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：

 #include <stdio.h>
 #include <windows.h>

 int CrnGetImageFileMachine(LPCSTR lpFileName)
 {
     IMAGE_DOS_HEADER idh={};
     FILE *f = fopen(lpFileName, "rb");
     fread(&idh, sizeof(idh), , f);
     IMAGE_FILE_HEADER ifh;
     fseek(f, idh.e_lfanew + , SEEK_SET);
     fread(&ifh, sizeof(ifh), , f);
     fclose(f);
     return ifh.Machine;
 } 

 int main(int c,char** v)
 {
     if(c != )
     {
         printf("usage: %s exepath/dllpath\n",v[]);
         getchar();
         return ;
     }
     printf("你查看的文件是: %s\n",v[]);
     printf("它的位数是:");
     int n = CrnGetImageFileMachine(v[]);
     if (n == 0x014C)
         printf("x86");
     else if (n == 0x0200)
         printf("IA64");
     else if (n == 0x8664)
         printf("x64");
     else
         printf("Unknown");

     printf("\n");
     getchar();
     return ;
 }