数据结构--BlockQuery，HashQuery，通讯录-优快云博客

本文链接：https://blog.youkuaiyun.com/liuzhustu/article/details/53898726
本文介绍了一个使用 C++ 实现的联系人信息管理系统。系统包括两个主要部分：ContactList 类用于维护联系人的列表，并提供添加、更新、删除和查询等功能；HashFind 类实现了基于哈希表的快速查找功能。此外，系统还支持按首字母分块查询，提高了搜索效率。
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#include <iostream>
#include<list>
using namespace std;
 //jianli Hash class
 //
 class ContactInfo
 {
 public:
    string name;
    string phoneNum;
    string email;
 ContactInfo(string n,string p,string e)
 {
     name=n;
     phoneNum=p;
     email=e;
 }
 ContactInfo()
 {

 }
 string getName()
 {
     return name;
 }
 string getPhoneNum()
 {
    return phoneNum;
 }
 string getEmail()
 {
     return email;
 }
 int getkey()
 {
     int num=0;
     for(int i=0;i<name.size()&&(name[i]!='\0');i++)
     {
            num+=name[i];
     }
     return num;
 }
 bool operator==(ContactInfo &c2)
 {
     return name==c2.name;
 }
 bool operator<(ContactInfo &c2)
 {
     return name<c2.name;
 }
 };
 class HashFind{
 public:
     list<ContactInfo> *p;
     int length;
     HashFind(int n)
     {
        p=new list<ContactInfo>[n];
        length=n;
     }
     int Hash(int x)
     {
         return (x)%length;
     }
     void buildHash(list<ContactInfo> &ll)
     {

           list<ContactInfo>::iterator iter;

                for(iter=ll.begin();iter!=ll.end();iter++)
                    {

                            p[Hash((*iter).getkey())].push_back((*iter));
                    }
     }
     ContactInfo find_contact(ContactInfo a)
     {

         list<ContactInfo>::iterator iter;

                for(iter=p[Hash(a.getkey())].begin();iter!=p[Hash(a.getkey())].end();iter++)
                    {

                           if(a==(*iter))
                           {
                                cout<<"name: "<<(*iter).name<<" phone: "<<(*iter).phoneNum<<" Email "<<(*iter).email<<endl;
                               return a;
                           }
                    }

     }



 };

 class ContactList
 {
     public:
     list<ContactInfo> contacts;

     int blockInfo[26][2];
     int length;
     ContactList(int size)
     {
            for(int i=0;i<26;i++)
                for(int j=0;j<2;j++)
            {
                blockInfo[i][j]=0;
                length=size;
            }
     }
     bool addContact(string name,string phonenum,string email)
     {
         int pos=0;
         ContactInfo contact(name,phonenum,email);
         while(pos<contacts.size())
         {
             list<ContactInfo>::iterator iter;
             int i=0;
             for(iter=contacts.begin();iter!=contacts.end();iter++)
             {
                      if(i==pos)
                      {
                          break;
                      }
                       i++;
             }
             if(*iter==contact)
             {
                 break;
             }
             else if(*iter<contact)
             {
                 pos++;
             }
             else
             {
                 contacts.insert(iter,contact);
                 break;
             }

        }
     }
/*bool removeContact(string name,string phonenum,string email)
     {

         ContactInfo contact(name,phonenum,email);
list<ContactInfo>::iterator iter;

             for(iter=contacts.begin();iter!=contacts.end();iter++)
             {
                      if((*iter)==contact)
                      {
                            break;
                      }
             }
            contacts.remove(contact);
            return true;

     }   */
 bool UpdateContact(string name,string phonenum,string email)
     {

         ContactInfo contact(name,phonenum,email);

list<ContactInfo>::iterator iter;
             for(iter=contacts.begin();iter!=contacts.end();iter++)
             {
                      if((*iter)==contact)
                      {
                            break;
                      }
             }
          (*iter).phoneNum=contact.phoneNum;
          (*iter).email=contact.email;

     }
 bool DeleteContact(string name,string phonenum,string email)
     {

                ContactInfo contact(name,phonenum,email);

                list<ContactInfo>::iterator iter;
             for(iter=contacts.begin();iter!=contacts.end();iter++)
             {
                      if((*iter)==contact)
                      {
                          iter= contacts.erase(iter);
                            break;
                      }
             }


     }
    void showList()
    {
        list<ContactInfo>::iterator iter;
        cout<<"-------------------ContactLists--------------"<<endl;
        for(iter=contacts.begin();iter!=contacts.end();iter++)
             {
                      cout<<"name: "<<(*iter).name<<" phone: "<<(*iter).phoneNum<<" Email "<<(*iter).email<<endl;
             }
        cout<<"-------------------ContactLists--------------"<<endl;
            }
     int blockQuery(string name)
     {

         int I=97;
         while(I<123)
         {
             int start=0;
             int end=0;
             start=end;
             int flag1=1;
             int flag2=1;
             list<ContactInfo>::iterator iter;
             while(start<contacts.size()&&flag1)
             {

                int i=0;
                for(iter=contacts.begin();iter!=contacts.end();iter++)
                    {

                         if((*iter).name[0]<I)
                         {
                            start++;
                            flag1=1;
                         }
                     else
                      {
                        flag1=0;
                        break;
                      }
                }

             }

             end=(start);
            while(end<contacts.size()&&flag2)
             {


                for(;iter!=contacts.end()&&(end<contacts.size());iter++)
                {
                         if((*iter).name[0]==I)
                           {
                                end++;
                                flag2=1;
                           }
                    else  if(((*iter).name[0]!=I))
                    {
                       flag2=0;
                       break;
                   }

               }

             }

             blockInfo[I-97][0]=start;
             blockInfo[I-97][1]=end;

             I++;
         }
         int nam=(int)name[0];

         int s=blockInfo[nam-97][0];
         int e=blockInfo[nam-97][1];

         int ss=0;
         list<ContactInfo>::iterator itera;
         list<ContactInfo>::iterator is;
         list<ContactInfo>::iterator ie;
         for(itera=contacts.begin();itera!=contacts.end();itera++)
         {
                       if(ss==s)
                       {

                           is=itera;
                       }
                       if(ss==e)
                       {

                           ie=itera;
                           break;
                       }
                       ss++;
         }

             for(itera=is;itera!=ie;itera++)
         {

                      if((*itera).name==name)
                      {
                          cout<<"name: "<<(*itera).name<<" phone: "<<(*itera).phoneNum<<"Email "<<(*itera).email<<endl;
                          return true;
                      }
         }
         cout<<"end"<<endl;
         return false;

     }

 };
 void show_table()
 {

 }
int main()
{
    ContactList a(10);
    ContactInfo b("sss","sss","sss");
    a.contacts.push_back(b);
    a.addContact("abb","165","123456");
    a.addContact("abc","156","123456");
    a.addContact("cdc","187","123456");
    a.addContact("bcd","163","123456");
    a.showList();
    cout<<"--------blockQuery--sss-------"<<endl;
    a.blockQuery("sss");
    cout<<"--------update--sss-------"<<endl;
    a.UpdateContact("sss","1566653","13006666@qq.com");
    a.showList();
    cout<<"--------delete--abc-------"<<endl;
    a.DeleteContact("abc","156","123456");
    a.showList();
     HashFind h(10);

     cout<<"--------HashQuery--abb-------"<<endl;
     h.buildHash(a.contacts);
     ContactInfo c("abb","122","123");
     h.find_contact(c);

    return 0;
}