#include <string>
#include <fstream>
#include <ctime>
using namespace std;
class student
{
private:
long int stu_num; //學號，宿舍號
char stu_name[40]; //姓名
char class_name[40]; //班別
char house_name[20]; //宿舍
public:
student()
{
stu_num=0;
stu_name[0] =0;
class_name[0] =0;
house_name[0] =0;
}
student::student(long a, char * b,char *c,char *d)
{
Setdata(a , b, c, d);
}
char * Getstuname(void) //姓名查找
{
return stu_name ;
}
long Getstunum(void) //學號查找
{
return stu_num;
}
char * Gethousename(void) //宿舍號查找
{
return house_name;
}
char * Getclassname(void) //按班級查找
{
return class_name;
}
void Setdata(long a, char *b,char *c,char *d)
{
stu_num = a;
strcpy(stu_name, b);
strcpy(class_name, c);
strcpy(house_name, d);
}
void Show(void)
{
cout<<"學號:"<<stu_num<<"\t"<<"姓名:"<<stu_name<<"\t";
cout<<"班級:"<<class_name<<"\t\t"<<"宿舍:"<<house_name<<"\n";
}
};
void main(void)
{
student s1;
int flags=0;
long stu_num; //學號
char stu_name[40]; //姓名
char class_name[40]; //班級
char house_name[20]; //宿舍
time_t t;
time(&t);
ifstream file1;
ofstream file3;
char flag = 'y';
cout<< "---------------------------------學生成績管理系統-------------------------------"<<endl;
cout<< "\t\t\t 時間:" << ctime(&t);
while( flag=='y' || flag=='Y')
{ //由flag控制循環
cout<<"--------------------------------------------------------------------------------\n";
cout<<"\t\t 1:註冊學生!\n";
cout<<"\t\t 2:按學號查看學生信息!\n";
cout<<"\t\t 3:按宿舍號查看學生信息!\n";
cout<<"\t\t 4:按姓名查看學生信息!\n";
cout<<"\t\t 5:按班級查看學生信息!\n";
cout<<"\t\t 6:顯示全部學生信息\n";
// cout<<"\t\t 7:按學號修改學生信息\n";
// cout<<"\t\t 8:按學號刪除學生信息!\n";
cout<<"--------------------------------------------------------------------------------\n";
cout<<"請輸入選擇：";
char choice;
cin>>choice;
switch(choice)
{
case '1':
file3.open("c:\\stu.dat",ios::app|ios::binary);
input: flags=0;
cout<<"輸入學號：";
cin>>stu_num;
while (stu_num<100000 || stu_num>999999)
{
cin.clear();
rewind(stdin);
cout << "妳輸入的學號不正確，請輸入壹個六位數的學號" << endl;
cout << "學號:";
cin >> stu_num;
}
file1.open("c:\\stu.dat",ios::in | ios::binary | ios::beg);//按讀方式打開文件
while(!file1.eof())
{
int n;
file1.read((char *)&s1,sizeof(student));
n=file1.gcount();
if(n==sizeof(student))
{
if(s1.Getstunum()==stu_num)
flags=1;
}
}
file1.clear();
file1.close();
if (flags==1)
{
cin.clear();
cout << "學號重復,請重輸入!" << endl;
goto input;
}
cout<<"輸入姓名："; cin>>stu_name;
cout<<"輸入班級："; cin>>class_name;
cout<<"輸入宿舍："; cin>>house_name;
s1.Setdata(stu_num,stu_name,class_name,house_name);
file3.write((char*)&s1,sizeof(s1));
file3.clear();
file3.close();
break;
case '2': //按學號查找
cout<<"請輸入學生的學號：";
cin>>stu_num;
while (stu_num<100000 || stu_num>999999)
{
cin.clear();
rewind(stdin);
cout << "妳輸入的學號不正確，請輸入壹個六位數的學號" << endl;
cout << "學號:";
cin >> stu_num;
}
file1.open("c:\\stu.dat",ios::in | ios::binary | ios::beg);//按讀方式打開文件
while(!file1.eof())
{
int n;
file1.read((char *)&s1,sizeof(student));
n=file1.gcount();
if(n==sizeof(student))
{
if(s1.Getstunum()==stu_num) //顯示學生信息
{
s1.Show();
flags=1;
}
}
}
file1.clear();
file1.close();
if (flags==0)
cout << "沒有找學號為："<< stu_num <<"的學生記錄!" << endl;
flags=0;
break;
case '3': //按宿舍號查找
cout<<"請輸入宿舍號:";
cin>>house_name;
file1.open("c:\\stu.dat",ios::in | ios::binary | ios::beg);//按讀方式打開文件
while(!file1.eof())
{
int n;
file1.read((char *)&s1,sizeof(student));
n=file1.gcount();
if(n==sizeof(student))
{
if(strcmp(s1.Gethousename(),house_name)==0)
{
s1.Show();
flags=1;
}
}
}
file1.clear();
file1.close();
if (flags==0)
cout << "沒有找到宿舍為:"<< house_name <<"的學生記錄!" << endl;
flags=0;
break;
case '4': //按姓名查找
cout<<"請輸入學生姓名:";
cin>>stu_name;
file1.open("c:\\stu.dat",ios::in | ios::binary | ios::beg);//按讀方式打開文件
while(!file1.eof())
{
int n;
file1.read((char *)&s1,sizeof(student));
n=file1.gcount();
if(n==sizeof(student))
{
if(strcmp(s1. Getstuname(),stu_name)==0)
{
s1.Show();
flags=1;
}
}
}
file1.clear();
file1.close();
if (flags==0)
cout << "沒有找到姓名為:"<< stu_name <<"的學生記錄!" << endl;
flags=0;
break;
case '5': //按班級查找
cout<<"請輸入班級名稱:";
cin>>class_name;
file1.open("c:\\stu.dat",ios::in | ios::binary | ios::beg);//按讀方式打開文件
while(!file1.eof())
{
int n;
file1.read((char *)&s1,sizeof(student));
n=file1.gcount();
if(n==sizeof(student))
{
if(strcmp(s1. Getclassname(),class_name)==0)
{
s1.Show();
flags=1;
}
}
}
file1.clear();
file1.close();
if (flags==0)
cout << "沒有找到該班級為:"<< class_name <<"的學生記錄!" << endl;
flags=0;
break;
case '6': //顯示全部學生信息
file1.open("c:\\stu.dat",ios::in | ios::binary);//按讀方式打開文件
while(!file1.eof())
{
int n;
file1.read((char *)&s1,sizeof(student));
n=file1.gcount();
if(n==sizeof(student))
{
s1.Show();
flags=1;
}
}
file1.clear();
file1.close();
if (flags==0)
cout << "數據庫沒有記錄!" << endl;
flags=0;
break;
// case '7': //修改學生信息按學號
// flags=0;
// cout<<"請輸入要修改學生的學號:";
// cin>>stu_num;
// while (stu_num<100000 || stu_num>999999)
// {
// cin.clear();
// rewind(stdin);
// cout << "妳輸入的學號不正確，請輸入壹個六位數的學號" << endl;
// cout << "學號:";
// cin >> stu_num;
// }
// file1.open("c:\\stu.dat",ios::in | ios::binary | ios::beg);//按讀方式打開文件
// while(!file1.eof())
// {
// int n;
// file1.read((char *)&s1,sizeof(student));
// n=file1.gcount();
// if(n==sizeof(student))
// {
// if(s1.Getstunum()==stu_num)
// {
// file3.open("c:\\stu.dat",ios::out|ios::binary);
// cout<<"輸入姓名："; cin>>stu_name;
// cout<<"輸入班級："; cin>>class_name;
// cout<<"輸入宿舍："; cin>>house_name;
// s1.Setdata(stu_num,stu_name,class_name,house_name);
// file3.write((char*)&s1,sizeof(s1));
// file3.close();
// flags=1;
// }
// }
// }
// file1.clear();
// file1.close();
// if (flags==0)
// {
// cout << "沒有此學生記錄，不能進行修改！" << endl;
// break;
// }
// break;
// case '8': //刪除學生信息按學號
default: flag = 'n';
break;
}
}
cout << "謝謝您的使用!" << endl;
}