// a.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"

#include <iostream.h>
#include <stdlib.h>

//int X[10000],Y[10000],n;

/*struct P
{
 int x1;
 int x2;
}a[10000];

int comp(const void *a,const void *b)
{
 struct P *x=(P *)a;
 struct P *y=(P *)b;
 if(x->x1>y->x1)
  return 0;
 else if(x->x1<y->x1)
  return 1;
 else
 {
  if(x->x2>y->x2)
   return 0;
 }
 return 1;
}

*/
struct In
{
int x;
int y;
}a[100];

int cmp( const void *a , const void *b )
{
struct In *c = (In *)a;
struct In *d = (In *)b;
if(c->x != d->x) return c->x - d->x;
else return c->y - d->y;
}

int MaxVisitors(int X[], int Y[], int n)
{

int main()
{
 int i,n;
 cin>>n;
 for(i=0;i<n;i++)
  cin>>a[i].x>>a[i].y;
  qsort(a,n,sizeof(a[0]),cmp);
 MaxVisitors(int X[], int Y[], int n)

 for(i=0;i<n;i++)
  cout<<a[i].x<<"   "<<a[i].y<<endl;
}

PS:写程序的草稿而已!

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