程序代码：

#include <stdio.h>

int main(int argc, char* argv[])
{
    FILE * fp = fopen("data", "r");
    char buffer[2] = {0x03, 0x00};
    short * i = buffer;
    fread(buffer, 1, 2, fp);
    *i &= 0x00ff;
    printf("%04hx\n", *i);
    fclose(fp);
    return 0;
}