1  #include <stdarg.h>
       2  
       3  typedef struct{double x,y;}point;
       4  point pts[]={{1.0,2.0},{3.0,4.0},{5.0,6.0},{7.0,8.0}};
       5  static int va1(int nargs,...)
       6  {
       7    va_list args;
       8    int i;
       9    point pi;
      10    va_start(args,nargs);
      11    for(i=0;i<nargs;i++){
      12      pi=va_arg(args,point);
      13      if(pts[i].x!=pi.x||pts[i].y!=pi.y)abort();
      14    }
      15    va_end(args);
      16  }
      17  
      18  typedef struct{int x,y;}ipoint;
      19  ipoint ipts[]={{1,2},{3,4},{5,6},{7,8}};
      20  static int va2(int nargs,...)
      21  {
      22    va_list args;
      23    int i;
      24    ipoint pi;
      25    va_start(args,nargs);
      26    for(i=0;i<nargs;i++){
      27      pi=va_arg(args,ipoint);
      28      if(ipts[i].x!=pi.x||ipts[i].y!=pi.y)abort();
      29    }
      30    va_end(args);
      31  }
      32  
      33  main()
      34  {
      35  va1(4,pts[0],pts[1],pts[2],pts[3]);
      36  va2(4,ipts[0],ipts[1],ipts[2],ipts[3]);
      37  exit(0);
      38  }