本文实例为大家分享了MFC实现学生选课系统的具体代码,供大家参考,具体内容如下
先上效果图:
主要功能:
输入学号,从数据库中查找学号,若找到相匹配的学号,则显示数据库中姓名、学历、导师,同时将所有可选课程显示出来。输入课程类型和课程名称查询课程进行选课,选课之后相应的选课门数、学分、学费、已选门数都会进行刷新。换个学号输入,选课总人数就会刷新,还有一些小功能就在代码里解释了。
我就只把按键的代码贴出来,完整工程下面有链接。
“确认输入”按键:
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
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);
}
“查询”按键:
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);
}
“选课”按键:
这里有一个关键的地方,就是假如用户选了两门相同的课,采用的是先添加后删掉的方法
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);
}
“退课”按键:
这里要弄清楚列表项里的行号和序号
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);
}
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。