program mencari nilai maksimum dan minimum

#include <cstdlib>
#include <iostream>

using namespace std;
class aku{
      friend istream& operator >> (istream&, aku&);
      friend ostream& operator << (ostream&, aku&);
     
      public  :
              void maks();
      private :
              int n, max, min, total;
              int A[20];
      };
     
      istream& operator >> (istream& in,aku& a){
                 a.total=0;
               cout<<"Banyaknya data  : "; in>>a.n;
               for(int i=0;i<a.n;i++){
                       cout<<"Data ke- : " <<i+1 <<" > "; in>>a.A[i];
                       a.total=a.total+a.A[i];
                       }
               }
              
      void aku::maks(){
        
           max=min=A[0];
           for(int i=1;i<n;i++){
                   if(A[i] > max) max=A[i];
                   if(A[i] < min) min=A[i];
                   }
         
           }
          
      ostream& operator << (ostream& out, aku& b){
               b.maks();
               out<<endl<<"Nilai terbesar  : " <<b.max <<endl;
               out<<"Nilai terkecil  : " <<b.min <<endl;
               out<<endl<<"Total jumlah dari semua bilangan tersebut adalah  : " <<b.total;
               }

int main(int argc, char *argv[])
{
    aku x;
    cin>>x;
    cout<<x;
   
  
    cout<<endl <<endl;
    system("PAUSE");
    return EXIT_SUCCESS;
}