#!/usr/local/bin/tcc -run
typedef struct {
    unsigned short form;
    unsigned char  beamnum;
    unsigned char  pitch;
    unsigned char  special;
    unsigned char  model;
    unsigned char  lensholder;
    unsigned char  parameterVersion;
    unsigned short softversion;
    unsigned short softmodel;
} STSenBaseInfo;


void main(){
    STSenBaseInfo base;
    int a = &base.lensholder - &base.form;
    printf("%d\n", a);
}