学生管理系统
#include<iostream.h>#include<iomanip>
#include<string.h>
#include<iomanip>
#include<sstream>
#include<fstream>
#include<conio.h>
using namespace std;
//全局变量
int i=0;
int j=0;
class Jiemian
{
public:
int jiemian1();
char jiemian2(int x);
};
int Jiemian::jiemian1()
{
int a;
while(1)
{
system("cls");
cout<<endl;
cout<<"*"<<"欢迎进入学生成绩管理系统"<<"*"<<endl;
cout<<"*"<<"Welcome!"<<"*"<<endl;
cout<<endl;
cout<<endl<<"1 学生\n"<<"2 教师\n"<<"3 退出系统\n";
cout<<"请选择您的身份(输入相应序号)进入我们的系统！\n";
cin>>a;
if(3==a) exit(1);
if(1==a||2==a) break;
cout<<"请输入正确的序号!\n";
getch();
}
return a;
}
char Jiemian::jiemian2(int x)
{
char a;
while(1)
{
system("cls");
cout<<"**"<<"欢迎进入学生成绩管理系统"<<"**"<<endl;
cout<<endl;
if(1==x) cout<<"-----欢迎您进入学生查询系统！-----";
cout<<endl;
if(2==x) cout<<"-----欢迎您进入教师管理系统！-----";
cout<<endl;
cout<<"a 登录\n"<<"b 注册\n"<<"c 返回主界面\n"<<"d 退出系统\n"<<"请选择操作!\n";
cin>>a;
if('d'==a) exit(1);
if('a'==a||'b'==a||'c'==a) break;
cout<<"请输入正确的字母!\n";
getch();
}
return a;
}
class Register:public Jiemian
{
private:
string name;
string cipher;
public:
bool regist(int x);
bool load(int x);
};
bool Register::regist(int x) //注册
{
char name[20];
int a=0;
string ss;
while(1)
{
cout<<"请设置用户名：";
cin>>name;
if(1==x)
{
ifstream infile("用户信息s.txt");
for(;getline(infile,ss);)
{
if(ss==name) { a=1; cout<<"用户名重复，请重新设置!"; break; }
}
infile.close();
}
if(2==x)
{
ifstream infile("用户信息t.txt");
for(;getline(infile,ss);)
{
if(ss==name) { a=1; cout<<"用户名重复，请重新设置!"; break; }
}
infile.close();
}
if(1==a) a=0;
else break;
}
while(1)
{
cout<<"请设置密码：";
char c,m[50];
int i=0;
while(1)
{
c=getch();
if(13==c&&0==i) continue;
if(13==c&&i>0) break;
m[i]=c;
cout<<"*";
i++;
}
char*lp1=new char[i+1];
for(int j=0;j<i;j++)
lp1[j]=m[j];
lp1[i]=NULL;
cipher=lp1;
delete []lp1;
cout<<endl<<"请确认密码：";
i=0;
string k;
while(1)
{
c=getch();
if(13==c&&0==i) continue;
if(13==c&&i>0) break;
m[i]=c;
cout<<"*";
i++;
}
char*lp2=new char[i+1];
for(j=0;j<i;j++)
lp2[j]=m[j];
lp2[i]=NULL;
k=lp2;
delete []lp2;
if(k!=cipher)
{
cout<<endl<<"确认密码失败!请重新设置密码!\n";
}
else break;
}
ofstream outfile("临时文件.txt");
outfile<<name<<endl<<cipher<<endl;
outfile.close();
ofstream outf("临时用户信息.txt");
if(1==x)
{
ifstream inf("用户信息s.txt");
for(string aa;getline(inf,aa);)
outf<<aa<<endl;
inf.close();
}
if(2==x)
{
ifstream inf("用户信息t.txt");
for(string aa;getline(inf,aa);)
outf<<aa<<endl;
inf.close();
}
outf.close();
ifstream li1("临时文件.txt");
ifstream li2("临时用户信息.txt");
if(1==x)
{
ofstream ou("用户信息s.txt");
for(string bb;getline(li1,bb);)
ou<<bb<<endl;
li1.close();
for(string cc;getline(li2,cc);)
ou<<cc<<endl;
ou.close();
}
if(2==x)
{
ofstream ou("用户信息t.txt");
for(string bb;getline(li1,bb);)
ou<<bb<<endl;
li1.close();
for(string cc;getline(li2,cc);)
ou<<cc<<endl;
ou.close();
}
li2.close();
cout<<endl<<"注册成功!\n";
return 0;
}
bool Register::load(int x) //登录
{
int a=0;
string ss;
char name[20];
while(1)
{
cout<<"请输入用户名：";
cin>>name;
if(1==x)
{
ifstream infile("用户信息s.txt");
for(;getline(infile,ss);)
{
if(1==a) break;
if(ss==name) a=1;
}
infile.close();
}
if(2==x)
{
ifstream infile("用户信息t.txt");
for(;getline(infile,ss);)
{
if(1==a) break;
if(ss==name) a=1;
}
infile.close();
}
cout<<"请输入密码：";
char c,m[50];
int i=0;
while(1)
{
c=getch();
if(13==c&&0==i) continue;
if(13==c&&i>0) break;
m[i]=c;
cout<<"*";
i++;
}
char*lp=new char[i+1];
for(int j=0;j<i;j++)
lp[j]=m[j];
lp[i]=NULL;
cipher=lp;
if(cipher==ss&&1==a) break;
else { cout<<endl<<"用户名或密码错误!"; getch(); return 0;}
}
return 1;
}
class teacher:public Register
{
protected:
teacher *s[50];
ofstream *file[50];
char name[20];
double math,chinese,english,average,sum;
public:
teacher()
{
}
teacher(char n[20],double ma,double chin,double eng)
{
strcpy(name,n);
math=ma;
chinese=chin;
english=eng;
}
void sr();
void zj();
void sc();
void xg();
void qb();
void xitong();
double getsum()
{
sum=chinese+english+math;
return sum;
}
double getaver()
{
average=getsum()/3;
return average;
}
~teacher()
{
}
};
void teacher::sr()
{
char c;
do{
cout<<"请输入姓名"<<endl;
cin>>name;
cout<<"请输入数学成绩："<<endl;
cin>>math;
cout<<"请输入语文成绩："<<endl;
cin>>chinese;
cout<<"请输入外语成绩："<<endl;
cin>>english;
file[j]=new ofstream("d:\\document",ios::ate);
*file[j]<<"姓名"<<name<<"数学成绩"<<math<<"语文成绩"<<chinese<<"外语成绩"<<english<<endl;
j++;
s[i]=new teacher(name, math, chinese, english);
i++;
cout<<"数据录入成功，想继续录入吗(y/n)"<<endl;
cin>>c;
int flag2=0;
do
{
if(c!='y'&&c!='n')
{
cout<<"指令错误！请重新输入！"<<endl;
cin>>c;
}
else
flag2=1;
}while(flag2==0);
ofstream outflie("d:\\document",ios::ate);
for(int z=0;z<i;z++)
{
outflie<<s;
}
outflie.close();
}while(c=='y');
}
void teacher::zj()
{
char c;
do
{
cout<<"请输入您要增加的学生的姓名："<<endl;
cin>>name;
cout<<"请输入数学成绩："<<endl;
cin>>math;
cout<<"请输入语文成绩："<<endl;
cin>>chinese;
cout<<"请输入外语成绩："<<endl;
cin>>english;
file[j]=new ofstream("d:\\document",ios::ate);
*file[j]<<"姓名"<<name<<"数学成绩"<<math<<"语文成绩"<<chinese<<"外语成绩"<<english<<endl;
j++;
s[i]=new teacher(name, math, chinese, english);
i++;
cout<<"数据录入成功，想继续录入吗(y/n)"<<endl;
cin>>c;
if(c!='y'&&c!='n')
{
cout<<"指令错误！请重新输入！"<<endl;
cin>>c;
}
ofstream inflie("d:\\document",ios::ate);
for(int z=0;z<i;z++)
{
inflie<<s;
}
inflie.close();
}while(c=='y');
}
void teacher::sc()
{
char name[20];bool flag3=0;char c;
do{
cout<<"请输入您要删除的学生姓名："<<endl;
cin>>name;
ifstream outflie("d:\\document",ios::ate);
for(int h=0;h<i;h++)
{
if(strcmp(name,s[h]->name)==0)
{
flag3=1;
i--;
do{
s[h]=s[h+1];
h++;
}while(h<=i);
}
}
if(flag3==0)
cout<<"您要求删除的对象本来就不存在！请检查输入的正确性！";
cout<<"要继续删除吗？(y/n)"<<endl;
cin>>c;
if(c!='y'&&c!='n')
{
cout<<"指令错误！请重新输入！"<<endl;
cin>>c;
}
outflie.close();
}while(c=='y');
}
void teacher::xg()
{
/*ifstream fin("d:\\document",ios::ate)*/
char name[20];
double mat,chin,eng;
int flag2=0;
char c;
do
{
cout<<"请输入您要修改的学生的姓名："<<endl;
cin>>name;
ofstream inflie("d:\\document",ios::ate);
for(int h=0;h<i;h++)
{
if(strcmp(name,s[h]->name)==0)
{
flag2=1;
cout<<"请输入新的数学成绩："<<endl;
cin>>mat;
cout<<"请输入新的语文成绩："<<endl;
cin>>chin;
cout<<"请输入新的外语成绩："<<endl;
cin>>eng;
s[h]->chinese=chin;
s[h]->math=mat;
s[h]->english=eng;
cout<<"数据修改成功！";
}
inflie<<s;
}
if(flag2==0)
{
cout<<"您要修改的学生本来就不存在！请检查重新输入！"<<endl;
}
cout<<"想继续修改吗(y/n)"<<endl;
cin>>c;
if(c!='y'&&c!='n')
{
cout<<"指令错误！请重新输入！"<<endl;
cin>>c;
}
inflie.close();
}while(c=='y');
}
void teacher::qb()
{
cout<<"本系统所有学生数据如下："<<endl;
if(i==0)
cout<<"管理系统中没有录入数据或者数据已经被删除！"<<endl;
for(int k=0;k<i;k++)
{
cout<<k+1<<" "<<"姓名:"<<" "<<s[k]->name<< "语文："<<" "<<s[k]->chinese<<"数学："<<" "<<s[k]->math
<<"外语："<<" "<<s[k]->english<<"总分："<<" "<<(*s[k]).getsum()
<<"平均分："<<" "<<(*s[k]).getaver()<<endl;
}
}
void teacher::xitong()
{
cout<<"请选择您需要的操作！"<<endl;
cout<<"操作："<<endl;
cout<<"(0)数据录入"<<endl;
cout<<"(1)增加人员"<<endl;
cout<<"(2)删除人员"<<endl;
cout<<"(3)修改数据"<<endl;
cout<<"(4)输出所有学生的数据"<<endl;
cout<<"选择相关操作请输入相对的括号里的阿拉伯数字！"<<endl;
char p;char w;
int flag2=0;
do
{
cin>>p;
if((p>='0'&&p<='4'))
flag2=1;
else
cout<<"指令错误！请重新输入："<<endl;
}while(flag2==0);
do
{
switch(p)
{
case'0':
{
teacher te;
te.sr();
break;
}
case'1':
{
teacher te;
te.zj();
break;
}
case'2':
{
teacher te;
te.sc();
break;
}
case'3':
{
teacher te;
te.xg();
break;
}
case'4':
{
teacher te;
te.qb();
break;
}
}
cout<<"您想继续进行其他操作吗?(y/n)"<<endl;
int flag4=0;
do{
cin>>w;
if(w!='y'&&w!='n')
cout<<"指令错误！请重新输入！"<<endl;
else
flag4=1;
}while(flag4==0);
if(w=='y')
{
cout<<"请输入操作代码"<<endl;
cout<<"(0)数据录入"<<endl;
cout<<"(1)增加人员"<<endl;
cout<<"(2)删除人员"<<endl;
cout<<"(3)修改数据"<<endl;
cout<<"(4)输出所有学生的数据"<<endl;
cin>>p;
}
}while(w=='y');
}
class student:public teacher
{
char n[20];char c;
public:
void chazhao();
};
void student::chazhao()
{
do{
int flag=0;
cout<<"请输入你要查询的学生姓名"<<endl;
cin>>n;
ifstream outflie("d:\\document",ios::ate);
for(int s=0;s<i;s++)
{
if(strcmp(n,(*s[s]).name)==0)
{
flag=1;
cout<<"您要查询的学生是："<<(s[s]).name<<endl;
cout<<(*s[s]).name<<"的总成绩成绩是"<<(s[s]).getsum()<<endl<<"平均成绩是："<<(*s[s]).getaver()<<endl;
}
}
if(flag==0)
cout<<"对不起!您要查询的学生不存在!"<<endl;
cout<<"您想继续查询吗?(y/n)"<<endl;
cin>>c;
if(c!='y'&&c!='n')
{
cout<<"指令错误！请重新输入！"<<endl;
cin>>c;
}
} while(c=='y');
}
int main()
{
system("color 9f");
teacher te;
while(1)
{
int a=te.jiemian1();
char b;
bool c;
do
{
b=te.jiemian2(a);
if('c'==b) break;
switch(b)
{
case 'a': c=te.load(a);
break;
case 'b': c=te.regist(a); getch();
break;
}
if(2==a&&'a'==b&&1==c)
{
te.xitong();
}
if(1==a&&'b'==b&&1==c)
{
student stu;
stu.chazhao();
}
}while(0==c);
}
return 0;
}
