MFC实现学生选课系统

void Cversion02Dlg::OnBnClickedButton1(){  UpdateData(true);  printmenshu=0;//将显示的选课门数、已选学分、学费清零  yixuanxf=0;  xuefei=0;  yixuanms=0;//printmenshu是用来显示在MFC上，程序里处理的是yixuanms，最后将yxuanms赋给printmenshu，其实可以不用yixuanms，将yixuanms全部替换为printmenshu也可以  if(yixuan.GetItemCount()!=0){//如果yixuan列表不为空，则选课总人数加1。    xuankezrs++;  }  while ( yixuan.DeleteItem (0));//yixuan列表清空  int i=0,j=0;  for(i=0;i<30;i++){    if(ugs[i].chaxunxuehao(xuehao)){      CString edit1,edit2,edit3;      edit1=ugs[i].printname();      edit2=ugs[i].printban();      edit3=ugs[i].printxue();      SetDlgItemText(IDC_EDIT2,edit1);//这里也可以直接在控件上添加变量，直接赋给它。就像printxueli=edit3      SetDlgItemText(IDC_EDIT3,edit2);      //SetDlgItemText(IDC_EDIT3,edit3);      printxueli=edit3;      break;    }  }  for(j=0;j<15;j++){    if(gs[j].chaxunxuehao(xuehao)){      CString edit1,edit2,edit3;      edit1=gs[j].printname();      edit2=gs[j].printdao();      edit3=gs[j].printxue();      SetDlgItemText(IDC_EDIT2,edit1);      SetDlgItemText(IDC_EDIT3,edit2);      //SetDlgItemText(IDC_EDIT3,edit3);      printxueli=edit3;      break;    }  }  if(i==30&&j==15){    INT_PTR nRes;    nRes=MessageBox(_T("请输入正确的学号"),_T("错误"),MB_OK|MB_ICONERROR);    return; //这里不写return会直接运行下面的程序  }else{    yixuannum[k]=xuehao;//将找到的学号存在数组里，用来判断后面输入的学号是否前面输入过    k++;  }  if(k>1){ //这里的k是从1开始的，即当k=1时，只输入了第一个学号，不用判断是否已经选过课    for(int q=0;q<k-1;q++){ //这里注意q<k-1，当k=2时表示此时的学号是第二次输入的，需判断与第一次输入的学号是否相同，第一次的学号存在yixuannum[0]里      if(xuehao==yixuannum[q]){        MessageBox(_T("该学生已经选过课了"),_T("错误"),MB_OK|MB_ICONERROR);        break;//这里如果写成return，不知道为什么选课总人数不会刷新了      }    }  }  while ( kexuan.DeleteItem (0));  for(int p=0;p<12;p++){   CString klx,kmc,kxh,kxf,krs;   klx=c[p].klx();   kmc=c[p].kmc();   krs.Format(_T("%d"),yixuankrs[p]);   kxh.Format(_T("%d"),c[p].kxh());    kxf.Format(_T("%d"),c[p].kxf());   kexuan.InsertItem(p,kxh);   kexuan.SetItemText(p,1,klx);   kexuan.SetItemText(p,2,kmc);   kexuan.SetItemText(p,3,kxf);   kexuan.SetItemText(p,4,krs);  }  UpdateData(false);}

void Cversion02Dlg::OnBnClickedButton2(){  // TODO: 在此添加控件通知处理程序代码  UpdateData(true);  while ( kexuan.DeleteItem (0));//首先将kexuan清空，否则后面产生的列表都会加在原来的列表后面。这里只需循环清掉第一行就可以，因为清掉一行下面一行会自动上来  if(inputkmc.IsEmpty()){//判断输入课程名称是否为空  int q=0,k=0;  for(q=0;q<12;q++){    if(inputklx==c[q].klx()){      CString kmc,kxh,kxf,krs;//下面SetItemText中参数是CString类型，必须将各个参数转为CString      kmc=c[q].kmc();      krs.Format(_T("%d"),yixuankrs[q]); //正常应该写成krs.Format("%d",yixuankrs[q]);但是会报错，前面加上_T就可以了      kxh.Format(_T("%d"),c[q].kxh());      kxf.Format(_T("%d"),c[q].kxf());      kexuan.InsertItem(k,kxh);      kexuan.SetItemText(k,1,inputklx);      kexuan.SetItemText(k,2,kmc);      kexuan.SetItemText(k,3,kxf);      kexuan.SetItemText(k,4,krs);      k++;    }  }  if(k==0){    MessageBox(_T("请输入正确的课程类型"),_T("错误"),MB_OK|MB_ICONERROR);    for(int p=0;p<12;p++){ //前面已经将列表清空，这里提示错误信息之后，将所有课程显示出来   CString klx,kmc,kxh,kxf,krs;   klx=c[p].klx();   kmc=c[p].kmc();   krs.Format(_T("%d"),yixuankrs[p]);   kxh.Format(_T("%d"),c[p].kxh());   kxf.Format(_T("%d"),c[p].kxf());   kexuan.InsertItem(p,kxh);   kexuan.SetItemText(p,1,klx);   kexuan.SetItemText(p,2,kmc);   kexuan.SetItemText(p,3,kxf);   kexuan.SetItemText(p,4,krs);  }  }  }  else if(inputklx.IsEmpty()){//判断输入课程类型是否为空  int l=0;  for(l=0;l<12;l++){    if(inputkmc==c[l].kmc()){      CString klx,kxh,kxf,krs;      klx=c[l].klx();      krs.Format(_T("%d"),yixuankrs[l]);      kxh.Format(_T("%d"),c[l].kxh());      kxf.Format(_T("%d"),c[l].kxf());      kexuan.InsertItem(0,kxh);      kexuan.SetItemText(0,1,klx);      kexuan.SetItemText(0,2,inputkmc);      kexuan.SetItemText(0,3,kxf);      kexuan.SetItemText(0,4,krs);      break;    }  }  if(l==12){    MessageBox(_T("请输入正确的课程名称"),_T("错误"),MB_OK|MB_ICONERROR);    for(int p=0;p<12;p++){   CString klx,kmc,kxh,kxf,krs;   klx=c[p].klx();   kmc=c[p].kmc();   krs.Format(_T("%d"),yixuankrs[p]);   kxh.Format(_T("%d"),c[p].kxh());    kxf.Format(_T("%d"),c[p].kxf());   kexuan.InsertItem(p,kxh);   kexuan.SetItemText(p,1,klx);   kexuan.SetItemText(p,2,kmc);   kexuan.SetItemText(p,3,kxf);   kexuan.SetItemText(p,4,krs);  }  }  }  else{  int m=0;  for(m=0;m<12;m++){    if(inputkmc==c[m].kmc()&&inputklx==c[m].klx()){//如果输入课程类型和课程名称都不为空，判断课程类型和课程名称是否匹配      CString kxh,kxf,krs;      krs.Format(_T("%d"),yixuankrs[m]);      kxh.Format(_T("%d"),c[m].kxh());      kxf.Format(_T("%d"),c[m].kxf());      kexuan.InsertItem(0,kxh);      kexuan.SetItemText(0,1,inputklx);      kexuan.SetItemText(0,2,inputkmc);      kexuan.SetItemText(0,3,kxf);      kexuan.SetItemText(0,4,krs);      break;    }  }  if(m==12){    MessageBox(_T("请输入正确的课程类型和课程名称"),_T("错误"),MB_OK|MB_ICONERROR);    for(int p=0;p<12;p++){   CString klx,kmc,kxh,kxf,krs;   klx=c[p].klx();   kmc=c[p].kmc();   krs.Format(_T("%d"),yixuankrs[p]);   kxh.Format(_T("%d"),c[p].kxh());     kxf.Format(_T("%d"),c[p].kxf());   kexuan.InsertItem(p,kxh);   kexuan.SetItemText(p,1,klx);   kexuan.SetItemText(p,2,kmc);   kexuan.SetItemText(p,3,kxf);   kexuan.SetItemText(p,4,krs);  }  }  }  UpdateData(false);}

void Cversion02Dlg::OnBnClickedButton3(){  // TODO: 在此添加控件通知处理程序代码  UpdateData(true);  if(printxueli!="本科生"&&printxueli!="研究生"){//防止没输学号直接点选课导致程序错误    MessageBox(_T("请选输入学号"),_T("错误"),MB_OK|MB_ICONERROR);    return;  }  if(yixuanms<5){ //yixuanms是从0开始的  CString krs;  yixuankrs[chosexh-1]++;//这里不能用chosehanghao，要用chosexh-1。因为如果不经过查询，chosehanghao=chosexh-1，但是如果查询成功之后，这里chosehanghao不一定等于chosexh-1  krs.Format(_T("%d"),yixuankrs[chosexh-1]);  kexuan.SetItemText(chosehanghao,4,krs);  int n=0;  for(n=0;n<12;n++){ //在这个循环里即使选择的是同一门课也会添加进yixuan，若是想在这里不添加同一门课，不易做到    if(chosexh==c[n].kxh()){      CString klx,kmc,kxf,kxh;      klx=c[n].klx();      kmc=c[n].kmc();      kxf.Format(_T("%d"),c[n].kxf());      kxh.Format(_T("%d"),chosexh);      yixuan.InsertItem(yixuanms,kxh);      yixuan.SetItemText(yixuanms,1,klx);      yixuan.SetItemText(yixuanms,2,kmc);      yixuan.SetItemText(yixuanms,3,kxf);      yixuanxf=yixuanxf+c[n].kxf();      if(printxueli=="本科生"&&n>=0&&n<=3){        xuefei=xuefei+200*c[n].kxf();      }      else if(printxueli=="本科生"&&n>=4&&n<=7){        xuefei=xuefei+150*c[n].kxf();      }      else if(printxueli=="本科生"&&n>=8&&n<=11){        xuefei=xuefei+100*c[n].kxf();      }      else if(printxueli=="研究生"&&n>=0&&n<=3){        xuefei=xuefei+200*c[n].kxf();      }      else if(printxueli=="研究生"&&n>=4&&n<=7){        xuefei=xuefei+180*c[n].kxf();      }      else if(printxueli=="研究生"&&n>=8&&n<=11){        xuefei=xuefei+150*c[n].kxf();      }      yixuanms++;      break;      }    }  }  else{    MessageBox(_T("最多选择5门课"),_T("错误"),MB_OK|MB_ICONERROR);  }  for(int i=0;i<=yixuanms;i++){ //在这里判断选择的是否是同一门课，若是同一门课则将其删掉。相应的学分、选课人数和学费也要减掉    for(int j=i+1;j<=yixuanms;j++){      if(yixuan.GetItemText(i,0)==yixuan.GetItemText(j,0)){        CString str,str1,krs;        int strnum=0,strnum1=0;        str=yixuan.GetItemText(i,3);        strnum=_ttoi(str);        yixuanxf=yixuanxf-strnum;        str1=yixuan.GetItemText(i,0);        strnum1=_ttoi(str1)-1;        yixuankrs[chosexh-1]--;        krs.Format(_T("%d"),yixuankrs[chosexh-1]);        kexuan.SetItemText(chosehanghao,4,krs);        if(printxueli=="本科生"&&strnum1>=0&&strnum1<=3){        xuefei=xuefei-200*c[strnum1].kxf();      }      else if(printxueli=="本科生"&&strnum1>=4&&strnum1<=7){        xuefei=xuefei-150*c[strnum1].kxf();      }      else if(printxueli=="本科生"&&strnum1>=8&&strnum1<=11){        xuefei=xuefei-100*c[strnum1].kxf();      }      else if(printxueli=="研究生"&&strnum1>=0&&strnum1<=3){        xuefei=xuefei-200*c[strnum1].kxf();      }      else if(printxueli=="研究生"&&strnum1>=4&&strnum1<=7){        xuefei=xuefei-180*c[strnum1].kxf();      }      else if(printxueli=="研究生"&&strnum1>=8&&strnum1<=11){        xuefei=xuefei-150*c[strnum1].kxf();      }        yixuan.DeleteItem(j);        MessageBox(_T("已经选过该门课"),_T("错误"),MB_OK|MB_ICONERROR);        yixuanms--;        break;      }    }  }  printmenshu=yixuanms;  while ( kexuan.DeleteItem (0));  for(int p=0;p<12;p++){   CString klx,kmc,kxh,kxf,krs;   klx=c[p].klx();   kmc=c[p].kmc();   krs.Format(_T("%d"),yixuankrs[p]);   kxh.Format(_T("%d"),c[p].kxh());    kxf.Format(_T("%d"),c[p].kxf());   kexuan.InsertItem(p,kxh);   kexuan.SetItemText(p,1,klx);   kexuan.SetItemText(p,2,kmc);   kexuan.SetItemText(p,3,kxf);   kexuan.SetItemText(p,4,krs);  }  UpdateData(false);}

void Cversion02Dlg::OnBnClickedButton4(){  // TODO: 在此添加控件通知处理程序代码  UpdateData(true);  if(yixuanms>0){  yixuanms--;//点击退课之后，选课门数-1  CString str,str1,krs;  int tuixf=0,tuixh=0;  str=yixuan.GetItemText(tuihanghao,3);  tuixf=_ttoi(str);//CString转为int  yixuanxf=yixuanxf-tuixf;//已选学分减掉相应的学分  str1=yixuan.GetItemText(tuihanghao,0);  tuixh=_ttoi(str1)-1;//这里要注意课程序号是从1开始的，而对象数组和每门课已选人数数组是从0开始的  yixuankrs[tuixh]--;//每门课已选人数-1  if(printxueli=="本科生"&&tuixh>=0&&tuixh<=3){//两个列表控件属性已经设置为只能单选一行，所以点击一次这里只需减一次        xuefei=xuefei-200*c[tuixh].kxf();      }      else if(printxueli=="本科生"&&tuixh>=4&&tuixh<=7){        xuefei=xuefei-150*c[tuixh].kxf();      }      else if(printxueli=="本科生"&&tuixh>=8&&tuixh<=11){        xuefei=xuefei-100*c[tuixh].kxf();      }      else if(printxueli=="研究生"&&tuixh>=0&&tuixh<=3){        xuefei=xuefei-200*c[tuixh].kxf();      }      else if(printxueli=="研究生"&&tuixh>=4&&tuixh<=7){        xuefei=xuefei-180*c[tuixh].kxf();      }      else if(printxueli=="研究生"&&tuixh>=8&&tuixh<=11){        xuefei=xuefei-150*c[tuixh].kxf();      }  printmenshu=yixuanms;  yixuan.DeleteItem(tuihanghao);  while ( kexuan.DeleteItem (0));  for(int p=0;p<12;p++){   CString klx,kmc,kxh,kxf,krs;   klx=c[p].klx();   kmc=c[p].kmc();   krs.Format(_T("%d"),yixuankrs[p]);   kxh.Format(_T("%d"),c[p].kxh());     kxf.Format(_T("%d"),c[p].kxf());   kexuan.InsertItem(p,kxh);   kexuan.SetItemText(p,1,klx);   kexuan.SetItemText(p,2,kmc);   kexuan.SetItemText(p,3,kxf);   kexuan.SetItemText(p,4,krs);  }    }  else{    MessageBox(_T("已经退完全部课程"),_T("错误"),MB_OK|MB_ICONERROR);  }  UpdateData(false);}