c语言编程选课系统程序

{if(str3==cp->code||str3==cp->name)
{b1=true;cout<<"请输入新的课程名称；";
cin>>cp->name;cout<<"修改成功！\n";
}cp=cp->n;
}
if(!b1)cout<<"没找到或输入错误！！！\n";
}break;
cout<<" | 5.保存文件 0.退出 |\n";
cout<<" ---------------------------------------------\n";
cout<<"请选择你要的操作：";cin>>c1;
student *s;
course *n;
};
void main()
{
char *c1=new char [];course *che;student *she;string st1,st21,st22;
while(true)
{
ifstream fi1("c.txt");
if(fi1)
{cout<<"读取文件中。。。\n";
fi1>>st1;
if(st1.length()!=0)
{string str1="MK2A";
course *p1=new course;
che=p1;
while(st1[0]!=0)
while(true)
{
cout<<" _____________________________________________\n";
cout<<" | 1.修改课程信息 2.查看选课信息 |\n";
cout<<" | 3.按课程查看选课情况 4.按学生查看选课情况|\n";
}
else
{cout<<"ERROR:文件打开失败！！！！请在根目录下建立"<<"c.txt"<<"文本文件并写入选课信息!\n";}
break;}
system("cls");
while(true)
{
ifstream fi2("s.txt");
if(fi2)
case '2':
{cout<<"请输入要添加的课程名称：";
string str3;cin>>str3;
course *cp=che;
while(cp->n!=0)
{ cp=cp->n;}
cp->name=str3;
cp->n=new course;
cout<<"添加成功！\n";
{cout<<"读取文件中。。。\n";
fi2>>st21>>st22;
if(st21.length()!=0&&st22.length()!=0)
{string st20="12010rg";
student *p2=new student;
she=p2;
while(st21.length()!=0&&st22.length()!=0)
}
}break;
case '3':
{system("cls");
cout<<"选课情况如下：\n";
course *c6=che;student *s7;bool b10=1;
while(c6->n)
{if(c6->num)
{b10=0;cout<<c6->code<<'\t'<<c6->name<<" 有"<<c6->num<<"名同学选，分别是：\n";
{p1->name=st1;
p1->code=str1;
str1[3]++;
p1->n=new course;
p1=p1->n;
fi1>>st1;
}
cout<<"文件读取成功！\n";
cout<<"代码\t\t\t\t课程\n";
p1=che;
default:cout<<"输入错误！请重新输入！！！\n";break;
}
cout<<"请重新选择1.修改 2.添加 3.删除 0.退出 ：";
cin>>c1;
}
break;
}
else
{break;}
}
else
{cout<<"输入错误！请重新输入！！！\n";cout<<"请选择是否修改课程信息（yes||no）:";}
s7=c6->s;
while(s7)
{cout<<s7->number<<'\t'<<s7->name<<'\n';s7=s7->n;}}
c6=c6->n;}
if(b10){cout<<"还没开始选课 ！！！\n";}
}break;
case '4':
{system("cls");
string name;
string number;
int num;
course *c;
student *n;
};
class course
{public:
course(){num=0;s=0;n=0;}
string name;
string code;
int num;
{
cout<<"\t\t\t\t "<<"完成！！！\n\n\n";
}
cout<<"\t\t\t ";
for(j=1;j<=i/10;j++)
cout<<"●";
for(j=1;j<=10-i/10;j++)
{b1=true;
if(cp==che)che=che->n;
else
{cp3->n=cp->n;}
cout<<"删除成功！\n";break;
}cp3=cp;cp=cp->n;
}
if(!b1)cout<<"没找到或输入错误！！！\n";
}break;
}
}break;
case '2':
{ cout<<"选课信息如下：\n";
cout<<"代码\t\t\t\t课程\n";
course *p3=che;
while(p3->n)
{cout<<p3->code<<"\t\t\t\t"<<p3->name<<'\n';
p3=p3->n;
}break;
case '3':
{cout<<"请输入要删除的课程名称或代码：";
string str3;cin>>str3;
course *cp=che,*cp3;bool b1=false;
while(cp->n!=0)
{if(str3==cp->code||str3==cp->name)
while(true)
{cin>>c1;
if(c1[0]=='y'||c1[0]=='Y'||c1[0]=='N'||c1[0]=='n')
{if(c1[0]=='y'||c1[0]=='Y')
{cout<<"请选择1.修改 2.添加 3.删除 0.退出 ：";
cin>>c1;
cout<<"请选择1.查看某位学生选课信息 2.查看全部学生选课信息: ";
while(true)
{cin>>c1;
if(c1[0]=='1'||c1[0]=='2')
{if(c1[0]=='1')
{ cout<<"请输入参加选课学生的编号或姓名：";