xueshengjiguan.txt

每个学生信息包括：学号、姓名、籍贯。具体功能： 1、创建信息链表并以磁盘文件保存 2、读取磁盘文件并显示输出所有学生的籍贯信息 3、按学号或姓名查询其籍贯 4、按籍贯查询并输出该籍贯的

#include<iostream.h> 
#include<string.h> 
#include<fstream.h> 
#include<stdlib.h> 
class stu 
{ 
char name[20]; 
int number; 
char bornplace[50]; 
public: 
stu() 
{ 
} 
stu(char n[20],int num,char born[50]) 
{ 
strcpy(name,n); 
number=num; 
strcpy(bornplace,born); 
} 
friend void main(); 
}; 


void main() 
{ 
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<<" 查询："<<endl; 
cout<<"(4)按姓名查询"<<endl; 
cout<<"(5)按学号查询"<<endl; 
cout<<"(6)输出所有学生的籍贯信息"<<endl; 
cout<<"(7)按籍贯查询"<<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; 
stu *s[50]; 
ofstream *file[50]; 
int i=0; 
int j=0; 
bool flag2=0; 
do 
{ 
cin>>p; 
if((p>='0'&&p<='6')) 
flag2=1; 
else 
cout<<"指令错误！请重新输入："<<endl; 
}while(flag2==0); 

do{ 
switch(p) 
{ 
case '0': 
{ 
char c; 
char name[20],bornplace[50];int number; 
do{ 
cout<<"请输入姓名"<<endl; 
cin>>name; 
cout<<"请输入学号："<<endl; 
cin>>number; 
cout<<"请输入籍贯："<<endl; 
cin>>bornplace; 
file[j]=new ofstream("d:\\document.txt",ios::ate); 
*file[j]<<"姓名"<<name<<"学号"<<number<<"籍贯"<<bornplace <<endl; 
j++; 
s[i]=new stu(name,number,bornplace); 
i++; 
cout<<"数据录入成功，想继续录入吗(y/n)"<<endl; 
cin>>c; 
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); 
} 
while(c=='y'); 
break; 
} 
case '4': 
{ 
char t[20]; 
char c; 
do 
{ 
int flag1=0; 
cout<<"请输入你要查询学生的姓名"<<endl; 
cin>>t; 
for(int q=0;q<i;q++) 
{ 
if(strcmp((*s[q]).name,t)==0) 
{ 
flag1=1; 
cout<<"您要查询的学生是："<<(*s[q]).name<<"学号是："<<(*s[q]).number<<"籍贯是："<<(*s[q]).bornplace<<endl; 
} 
} 
if(flag1==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'); 
break; 
} 

case '5': 
{ 
int n ;int j=0;char c; 

do{ 
int flag=0; 
cout<<"请输入你要查询的学生学号："<<endl; 
cin>>n; 
for(int j=0;j<i;j++) 
{ int no=((*s[j]).number); 
if(no==n) 
{ 
flag=1; 
cout<<"您要查询的学生是："<<(*s[j]).name<<endl; 
cout<<"籍贯是："<<(*s[j]).bornplace<<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'); 
break; 
} 
case '7': 
{ 
char m[20];int j=0;char c; 

do{ 
int flag=0; 
cout<<"请输入你要查询籍贯："<<endl; 
cin>>m; 
for(int w=0;w<i;w++) 
{ 
if(strcmp((*s[w]).bornplace,m)==0) 
{ 
flag=1; 
cout<<"您要查询的学生是："<<(*s[w]).name<<endl; 
cout<<"学号是："<<(*s[w]).number<<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'); 
break; 
} 
case '1': 
{ 
char name[20],bornplace[50];int number; 
char c; 
do 
{ 
cout<<"请输入您要增加的学生的姓名："<<endl; 
cin>>name; 
cout<<"请输入学号："<<endl; 
cin>>number; 
cout<<"请输入籍贯："<<endl; 
cin>>bornplace; 
file[j]=new ofstream("d:\\document",ios::ate); 
*file[j]<<"姓名"<<name<<"学号"<<number<<"籍贯"<<bornplace<<endl; 
j++; 
s[i]=new stu(name,number,bornplace); 
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; 
} 
}while(c=='y'); 
break; 
} 
case '2': 
{ 
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; 
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; 
} 
}while(c=='y'); 
break; 
} 
case '3': 
{ 
char name[20],born[50];int num;;flag2=0; 
char c; 
do 
{ 
cout<<"请输入您要修改的学生的姓名："<<endl; 
cin>>name; 
for(int h=0;h<i;h++) 
{ 
if(strcmp(name,s[h]->name)==0) 
{ 
flag2=1; 
cout<<"请输入新的学号："<<endl; 
cin>>num; 
cout<<"请输入新的籍贯："<<endl; 
cin>>born; 
s[h]->number=num; 
strcpy(s[h]->bornplace,born); 
cout<<"数据修改成功！"; 
} 
} 
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; 
} 
}while(c=='y'); 
break; 
} 

case '6': 
{ 
cout<<"本系统所有学生的籍贯信息如下："<<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<<" "<< 
"学号："<<" "<<s[k]->number<<" "<<"籍贯："<<" "<<s[k]->bornplace 
<<endl; 
} 
break; 
} 

} 
cout<<"您想继续进行其他操作吗?(y/n)"<<endl; 
bool 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<<" 查询："<<endl; 
cout<<"(4)按姓名查询"<<endl; 
cout<<"(5)按学号查询"<<endl; 
cout<<"(6)输出所有学生的籍贯信息"<<endl; 
cout<<"(7)按籍贯查询"<<endl; 
cout<<"选择相关操作请输入相对的括号里的阿拉伯数字！"<<endl; 
} 
cin>>p; 
}while(w=='y'); 
for(int x=0;x<i;x++) 
{ 
delete s[x]; 
cout<<"delete all members!"<<endl; 
} 


}