#include"iostream"
 using namespace std;
 int main()
 {
   void sort(int *p,int n);
   int a[5],i;
   cout<<"input array:"<<endl;
   for(i=0;i<5;i++)
   cin>>a[i];
   cout<<endl;
   sort(a,5);
   cout<<" the sorted array:"<<endl;
   for(i=0;i<5;i++)
   cout<<a[i]<<" ";
   cout<<endl;
   return 0;
 }
 
 void sort(int *p,int n)
 {
   int i,j,k,temp;
   for(i=0;i<n-1;i++)
   {
     k=i;
     for(j=i+1;j<n;j++)
     if(*(p+j)<*(p+k)) k=j;
     temp=*(p+k);
     *(p+k)=*(p+i);
     *(p+i)=temp;
   }
 }

//test_3 指针存放字符串
 #include<iostream>
 using namespace std;
// #include<string> //字符串变量 
 int main()
 {
   char str1[]="I Love C++",str2[20],*p1,*p2;
   p1=str1;
   p2=str2;
  for(;*p1!='\0';p1++,p2++)
  *p2=*p1;
  *p2='\0';
  p1=str1;
  p2=str2;
  cout<<"str1 is "<<p1<<endl;
  cout<<"str2 is "<<p2<<endl;
  return 0; 
 }

#include<iostream>
using namespace std;

 int main()
 {
   int max(int x, int y);
   int (*p)(int,int);
   int a,b,m;
   p=max;
   cin>>a>>b;
   m=p(a,b);
   
  cout<<"max is "<< m<<endl;
  return 0;
 } 
 
 int max(int x,int y)
 {
   int z;
   if (x<y)
   z=y;
   else
   z=x;
   return(z);
 }