c7-8.cpp

这我们老师对是面向对象程序设计（清华大学出版社）一书制作的PPT

#include <iostream>
#include <iomanip>
using namespace std;
int main()
{enum color {red,yellow,blue,white,black};
 color pri;
 int i,j,k,n=0,loop;
 for (i=red;i<=black;i++)
   for (j=red;j<=black;j++)
     if (i!=j)
      { for (k=red;k<=black;k++)
        if ((k!=i) && (k!=j))
         {n=n+1;
          cout<<n;
          for (loop=1;loop<=3;loop++)
           {switch (loop)
             {case 1: pri=color(i);break;
              case 2: pri=color(j);break;
              case 3: pri=color(k);break;
              default:break;
             }
          switch (pri)
            {case red:    cout<<setw(8)<<"red"; break;
             case yellow: cout<<setw(8)<<"yellow"; break;
             case blue:   cout<<setw(8)<<"blue"; break;
             case white:  cout<<setw(8)<<"white"; break;
             case black:  cout<<setw(8)<<"black"; break;
             default   :                   break;
            }
         }
      cout<<endl;
     }
   }
   cout<<"total:"<<n<<endl;
   return 0;
}