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={0}; 
    FILE *f = fopen(lpFileName, "rb"); 
    fread(&idh, sizeof(idh), 1, f); 
    IMAGE_FILE_HEADER ifh; 
    fseek(f, idh.e_lfanew + 4, SEEK_SET); 
    fread(&ifh, sizeof(ifh), 1, f); 
    fclose(f); 
    return ifh.Machine; 
} 

int main(int c,char** v)
{
    if(c != 2)
    {
        printf("usage: %s exepath/dllpath
",v[0]);
        getchar();
        return 0;
    }
    printf("你查看的文件是: %s
",v[1]);
    printf("它的位数是:");
    int n = CrnGetImageFileMachine(v[1]); 
    if (n == 0x014C) 
        printf("x86"); 
    else if (n == 0x0200) 
        printf("IA64"); 
    else if (n == 0x8664) 
        printf("x64"); 
    else 
        printf("Unknown");
    
    printf("
");
    getchar();
    return 0;
}