#pragma used

#include <stdio.h>#include <stdlib.h>#pragma pack(4)     //default value#if defined(ANDROID2_0)  #pragma message("android-2.0")        //only VS surpose#define VERSION "android 2.0"#elif defined(ANDROID4_0)#pragma message("android-4.0")#define VERSION "android 4.0"#else#warning No VERSION information...#error VERSION Not Find...#endifstruct t{char c1;   //  char :1   pack:4;   addr 0 short s;   //  short:2   pack:4;   addr 2 char c2;   //  char :1   pack:4;   addr 4 int i;     //  int  :4   pack:4;   addr 8 };int main(){printf("%s\n",VERSION);struct t t1;printf("%d\n",sizeof(t1));return 0;}