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#include <stdarg.h>

typedef struct{double x,y;}point;

point pts[]={{1.0,2.0},{3.0,4.0},{5.0,6.0},{7.0,8.0}};

static int va1(int nargs,...)

{

  va_list args;

  int i;

  point pi;

  va_start(args,nargs);

  for(i=0;i<nargs;i++){

    pi=va_arg(args,point);

    if(pts[i].x!=pi.x||pts[i].y!=pi.y)abort();

  }

  va_end(args);

}

typedef struct{int x,y;}ipoint;

ipoint ipts[]={{1,2},{3,4},{5,6},{7,8}};

static int va2(int nargs,...)

{

  va_list args;

  int i;

  ipoint pi;

  va_start(args,nargs);

  for(i=0;i<nargs;i++){

    pi=va_arg(args,ipoint);

    if(ipts[i].x!=pi.x||ipts[i].y!=pi.y)abort();

  }

  va_end(args);

}

main()

{

va1(4,pts[0],pts[1],pts[2],pts[3]);

va2(4,ipts[0],ipts[1],ipts[2],ipts[3]);

exit(0);

}