stuinfomanager.cpp

自己上学时编译的一个学生管理系统

        }     
}
void StuInfoManager::removeNote(bool isToRemove)
{
     if(empty())
     {  cout<<"当前没有任何记录."<<endl;
      return;
      }
      if(!isToRemove && toRemvNodes == 0)
      {
                     cout<<"当前没有被做了删除标记的项目"<<endl;
                     return;
                     }
    char choi[5];
    char pattern[20];
    int type;
    while (true){
          cout<<"请输入更改的方式\n"
              <<"1.按学号\n"
              <<"2.按姓名\n"
              <<"3.按名次\n";
              cin.getline(choi,5);
              if(choi[0] == '\0')
              break;
            if(choi[0] =='1')
            {cout<<"请输入要查询的学生的学号：";
            type = 0;
            }else if(choi[0] =='2')
            {cout<<"请输入要查询学生的姓名:";
             type=1;
             }else
             {cout<<"请输入要查询学生的名次";
             type=2;
             }
             cin.getline(pattern,20);
             bool gotMatch=false;
             Iterator it = findRecord(pattern,type,first());
             Iterator it_end = pastEnd();
             while (it!=it_end)
             {
                   if((!isToRemove && !(*it)->toBeDeleted)||
                     (isToRemove && (*it)->toBeDeleted))
                     {
                                 it = findRecord(pattern,type,++it);
                                 continue;
                                 }
             gotMatch = true ;
             cout<<" 找到一个匹配的记录：\n";
             dispTable();
             dispRecord(*it);
             cout<<"确定要改变这条信息标示吗？(y/n)";
             cin.getline(choi,5);
             if(choi[0]!='n' && choi[0]!='N')
               (*it)->toBeDeleted =!(*it)->toBeDeleted;
               if(isToRemove)
                   toRemvNodes++;
               else
                   toRemvNodes--;
               it= findRecord(pattern,type,++it);
               }
               if (!gotMatch)
                  cout<<"没有找到匹配的记录"<<endl;
                  else
                  {if (toRemvNodes != 0)
                    cout<<"当前有"<<toRemvNodes
                         <<"条记录被做了删除标记"<<endl;
                         else
                         cout<<"现在没有记录 "<<endl;
                         }
                         }
}
void StuInfoManager::modifyRecord(){
     if(empty())
     {cout<<"没有可供修改的资料"<<endl;
     return;
     }
     char choi[5];
     char pattern[20];
     char name[20];
     int type;
     string str;
     while(true)
     {cout<<"请输入如何找到欲修改的资料"
          <<"1.按学号\n"
          <<"2.按姓名\n"
          <<"3.按名次\n";
          cin.getline(choi,5);
          if(choi[0] == '\0') break;
          if(choi[0] == '1')
          {cout<<"请输入要查询的学生的学号；";
          type=0;}else if(choi[0] == '2')
          {cout<<"请输入要查询的学生的姓名；";
          type=1;}else
          {cout<<"请输入要查询的学生的名次";
          type=2;
          }
          cin.getline(pattern,20);
          Iterator it = findRecord(pattern,type,first());
          Iterator it_end = pastEnd();
          if(it == it_end)
          {cout<<"没有匹配的记录."<<endl;
          continue;
          }
          while (it!=it_end)
          { cout<<"寻找一个匹配的记录\n";
               dispTable();
               dispRecord(*it);
               cout<<"确定要修改这条记录吗?(Y/n)";
               cin.getline(choi,5);
               if(choi[0]!='n'&& choi[0]!='N')
               { int ncount = 0;
                 int tmpi =(*it)->index;
                 cout<<"下面请重新输入该学生信息\n";
                 cout<<"请输入学号";
                 cin>>(*it)->number;
                 cin.ignore();
                cout<<"请输入姓名:";
                cin.getline(name,20);
                (*it)->name = name;
                printf("请输入性别(1为男, 0为女):");
                cin>>str;
                cin.ignore();
                if(str[0]=='0')
                    (*it)->gender ="女";
                  else
               (*it)->gender ="男 ";
               float sum=0;
               for (int j=0;j<NUM_SUBJECT;j++)
               {
                   cout<<"请输入"<<subject_[j]<<"成绩:";
                   cin>>(*it)->score[j];
                   sum += (*it)->score[j];
                   }
                   cin.ignore();
                   (*it)->sum = sum;
                   (*it)->average = sum/NUM_SUBJECT;
                   ncount = 0;
                   Iterator it1;
                   for (it1=first(); it1!=it_end;it1++)
                   {if(it1 == it)continue;
                   if((*it)->index>tmpi&& (*it1)->sum>=sum)
                   (*it)->index--;
                   else if((*it)->index<=tmpi&& (*it1)->sum<sum)
                   (*it1)->index++;
                   if((*it)->sum>sum)
                   ncount++;
                   }
                  (*it)->index = ncount+1;
                  isModified = true ;
                  } 
                   it = findRecord(pattern,type,++it);//取下一条匹配的记录 
                   }
                   cout<<"已找完所有的记录\n"<<endl;
                   }
                  }
void StuInfoManager::sortRecords()
{ if(empty()){
  cout<<"没有可供排序的记录"<<endl;
   return;
}
string  str;
cout<<"请你输入要进行的操作："<<endl
    <<"1.按名字的上升排列:"<<endl 
    <<"2.按名字的下降排列:"<<endl
    <<"3.按学号进行升序排列:"<<endl
    <<"4.按学号的降序进行排列:"<<endl
    <<"5.按名次的升序进行排列:"<<endl
    <<"6.按名次的降序进行排列:"<<endl
    <<"7.不进行任何操作:"<<endl;
cin>>str;
cin.ignore();
if(str[0]<'1'||str[0]>'6') return;
int i,j;
int numStus = size();
for(i=0; i<numStus-1;i++)
{
        for(j=i+1;j<numStus;j++)
        {  if((str[0]=='1' &&  recVec[i]->number>recVec[j]->number)||
         (str[0]=='2'&&  recVec[i]->number<recVec[j]->number)||
         (str[0]=='3'&&recVec[i]->name>recVec[j]->name) ||
         (str[0]=='4'&&recVec[i]->name<recVec[j]->name)  ||
         (str[0]=='5'&&recVec[i]->index>recVec[j]->index )||
         (str[0]=='6'&&recVec[i]->index<recVec[j]->index ))
		  swap(recVec[i],recVec[j]);
		
		}
}    
cout<<"排序已经完成"<<endl;
isModified = true ;
}
void StuInfoManager :: saveRecords()
 {
     if(empty()){
             cout<<"没有记录程序"<<endl;
             return;
             }
char name[40];
string  fname;             
cout<<"请输入要存入的文件名:"<<endl;
cin.getline(name,40);
fname = name;
if(fname.empty())
fname = "sname";
ofstream of(fname.c_str(),ios_base::out);
if(!of)
{cout<<"不能存入文件"<<endl;
 return; 
}
StuInfoVec::saveRecords(of);
of.close();
cout<<size()<<"条记录已经存入文件"<<endl;
isModified = false ;
}
void StuInfoManager::loadRecords()
{
     char choi[5];
     if(!empty())
     {cout<<"请选择是否覆盖现有的记录(y)，还是继续读取:"<<endl
      <<"记录添加到现有记录之后(n)"<<endl 
       <<"直接回车则覆盖现有记录"<<endl;
       cin.getline(choi,5);
       if(choi[0]=='n'||choi[0]=='N')
          {isModified = true;
          }
          else
          {clear();
          }
}
string fname;
char fnamel[40];
cout<<"请输入要读取的文件名:";
cin.getline(fnamel,40);
fname= fnamel;
if(fname.empty())	
 fname = "sname";
 ifstream ifs(fname.c_str(),ios_base::in);
 if(!ifs){
         cout<<"打不开文件请从新选择"<<endl;         
         return ;
         }
int num = StuInfoVec::loadRecords(ifs);
ifs.close();
cout<<"取入"<<num<<"条记录.\n"
    <<"现在一共有"<<size()<<"条记录"<<endl;
}
void StuInfoManager::quit(){
     clear();
     cout<<"谢谢使用本系统,下次再见"<<endl;
       
     delete this;
         system("pause");
   

     exit(0);
}