数据结构与算法(C#实现)系列---演示篇(三)

                            Heavenkiller(原创)

         public static void ShowSortedList_Polynomial()

         {

              //100+10*x+x^2  + 1+10*x+100x^2

              SortedList tmpListA=new SortedList();

              SortedList tmpListB=new SortedList();

              SortedList tmpListC=new SortedList();//used to store the result

              SortedList tmpKeyList=new SortedList();//used to store all keys of two polynomials

              //init polynomial A and show it

              tmpListA.Add(0,100);

              tmpListA.Add(1,10);

              tmpListA.Add(2,1);

              ShowSortedList_ShowPolynomial("tmpListA",tmpListA.GetEnumerator());

              //init polynomial B and show it

              tmpListB.Add(0,1);

              tmpListB.Add(1,10);

              tmpListB.Add(2,100);

              ShowSortedList_ShowPolynomial("tmpListB",tmpListB.GetEnumerator());

              //init the key list which contains all keys of A and B but everyone once

              IDictionaryEnumerator tmpIDic=tmpListA.GetEnumerator();

              while(tmpIDic.MoveNext()!=false)

              {

                   if(!tmpKeyList.ContainsKey(tmpIDic.Key))

                   {

                       tmpKeyList.Add(tmpIDic.Key,null);

                   }

              }

              tmpIDic=tmpListB.GetEnumerator();

              while(tmpIDic.MoveNext()!=false)

              {

                   if(!tmpKeyList.ContainsKey(tmpIDic.Key))

                   {

                       tmpKeyList.Add(tmpIDic.Key,null);

                   }

              }

              //Add A and B and show the result

              tmpIDic=tmpKeyList.GetEnumerator();

              while(tmpIDic.MoveNext()!=false)

              {

                   object objA=null,objB=null,objC=null;

                   objC=tmpIDic.Key;

                   if(tmpListA.ContainsKey(objC))

                       objA=tmpListA[objC];

                   if(tmpListA.ContainsKey(objC))

                       objB=tmpListB[objC];

                   //objC=objA+objB;

                   //tmpKeyList[objC]=(int)objA+(int)objC;

                   tmpListC.Add(objC,(int)objA+(int)objB);

              }

              ShowSortedList_ShowPolynomial("the addition result of A and B",tmpListC.GetEnumerator());

         }

         public static void ShowSortedList_ShowPolynomial(string tip,IDictionaryEnumerator iDic)

         {

              string strExpress=null;

              iDic.Reset();

              while(iDic.MoveNext()!=false)

              {

                   strExpress+=iDic.Value.ToString()+"*X^"+iDic.Key.ToString()+"+";

              }

              Console.WriteLine(tip+":"+strExpress);

         }

}