#include<iostream>
#include<string>
#include<fstream.h>
class stu
{
char name[50];
double math,chinese,english,physics,biology,chemistry,average,sum;
public:
stu()
{
}
stu(char n[20],double ma,double chin,double eng,double phy,double bio,double che)
{
strcpy(name,n);
math=ma;
chinese=chin;
english=eng;
physics=phy;
biology=bio;
chemistry=che;
}
double getsum()
{
sum=chinese+english+math+physics+biology+chemistry;
return sum;
}
double getaver()
{
average=getsum()/6.0;
return average;
}
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)按总成绩查询"<<endl;
cout<<"(5)按姓名查询"<<endl;
cout<<"(6)输出所有学生的数据"<<endl;
cout<<"成绩名词"<<endl;
cout<<"(7)按总分查询排名"<<endl;
cout<<"(8)按语文查询排名"<<endl;
cout<<"(9)按数学查询排名"<<endl;
cout<<"(10)按英语查询排名"<<endl;
cout<<"(11)按物理查询排名"<<endl;
cout<<"(12)按生物查询排名"<<endl;   
cout<<"(13)按化学查询排名"<<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<='15'))
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];double math,chinese,english,physics,biology,chemistry;
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;
cout<<"请输入物理成绩："<<endl;
cin>>physics;
cout<<"请输入生物成绩："<<endl;
cin>>biology;
cout<<"请输入化学成绩："<<endl;
cin>>chemistry;
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<<"物理成绩"<<physics<<"生物成绩"<<biology<<"化学成绩"<<chemistry<<endl;
j++;
s[i]=new stu(name, math, chinese, english,physics,biology,chemistry);
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':
{
double t;char c;
do
{
int flag1=0;
cout<<"请输入你要查询学生的总成绩"<<endl;
cin>>t;
for(int q=0;q<i;q++)
{
if(s[q]->getsum()==t)
{
flag1=1;
cout<<"您要查询的学生是："<<(*s[q]).name<<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':
{
char n[20];int j=0;char c;
do{
int flag=0;
cout<<"请输入你要查询的学生姓名"<<endl;
cin>>n;
for(int j=0;j<i;j++)
{
if(strcmp(n,(*s[j]).name)==0)
{
flag=1;
cout<<"您要查询的学生是："<<(*s[j]).name<<endl;
cout<<(*s[j]).name<<"的总成绩成绩是"<<(*s[j]).getsum()<<endl<<"平均成绩是："<<(*s[j]).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');
break;
}
case '1':
{
char name[20];double math,chinese,english,physics,biology,chemistry;
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;
cout<<"请输入物理成绩："<<endl;
cin>>physics;
cout<<"请输入生物成绩："<<endl;
cin>>biology;
cout<<"请输入化学成绩："<<endl;
cin>>chemistry;
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<<"物理成绩"<<physics<<"生物成绩"<<biology<<"化学成绩"<<chemistry<<endl;  
j++;
s[i]=new stu(name, math, chinese, english,physics,biology,chemistry);
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];double mat,chin,eng,phy,bio,che;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;
cout<<"请输入新的物理成绩："<<endl;
cin>>phy;
cout<<"请输入新的生物成绩："<<endl;
cin>>bio;
cout<<"请输入新的化学成绩："<<endl;
cin>>che;
s[h]->chinese=chin;
s[h]->math=mat;
s[h]->english=eng;
s[h]->physics=phy;
s[h]->biology=bio;
s[h]->chemistry=che;
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<<"物理："<<" "<<s[k]->physics<<"生物："<<" "<<s[k]->biology<<"化学："<<" "<<s[k]->chemistry<<"总分："<<" "<<(*s[k]).getsum()
<<"平均分："<<" "<<(*s[k]).getaver()<<endl;
}
break;
}
case '7':
{
int t;stu b;

cout<<"本系统所以学生排名如下："<<endl;
for(int x=0;x<i-1;x++)
{
t=x;
for(int y=x+1;y<i;y++)
{
if((s[t]->getsum())<(s[y]->getsum()))
t=y;
if(t!=x)
{
b=*s[x];
*s[x]=*s[t];
*s[t]=b;
}
}
}
if(i==0)
cout<<"管理系统中没有录入数据或者数据已经被删除！";
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"<<"物理："<<" "<<s[k]->physics<<"生物："<<" "<<s[k]->biology<<"化学："<<" "<<s[k]->chemistry<<"总分："<<" "<<s[k]->getsum()
<<"平均分："<<" "<<s[k]->getaver()<<endl;
}
break;
}
case '8':
{
int t;stu b;

cout<<"本系统所以学生语文排名如下："<<endl;
for(int x=0;x<i-1;x++)
{
t=x;
for(int y=x+1;y<i;y++)
{
if((s[t]->chinese)<(s[y]->chinese))
t=y;
if(t!=x)
{
b=*s[t];
*s[t]=*s[x];
*s[x]=b;
}
}
}

if(i==0)
cout<<"管理系统中没有录入数据或者数据已经被删除！";
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<<"物理："<<" "<<s[k]->physics<<"生物："<<" "<<s[k]->biology<<"化学："<<" "<<s[k]->chemistry<<"总分："<<" "<<s[k]->getsum()
<<"平均分："<<" "<<s[k]->getaver()<<endl;
}
break;
}
case '9':
{
int t;stu b;

cout<<"本系统所以学生数学排名如下："<<endl;
for(int x=0;x<i-1;x++)
{
t=x;
for(int y=x+1;y<i;y++)
{
if((s[t]->math)<(s[y]->math))
t=y;
if(t!=x)
{
b=*s[t];
*s[t]=*s[x];
*s[x]=b;
}
}
}

if(i==0)
cout<<"管理系统中没有录入数据或者数据已经被删除！";
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<<"物理："<<" "<<s[k]->physics<<"生物："<<" "<<s[k]->biology<<"化学："<<" "<<s[k]->chemistry<<"总分："<<" "<<s[k]->getsum()
<<"平均分："<<" "<<s[k]->getaver()<<endl;
}
break;
}
case '10':
{
int t;stu b;

cout<<"本系统所以学生英语排名如下："<<endl;
for(int x=0;x<i-1;x++)
{
t=x;
for(int y=x+1;y<i;y++)
{
if((s[t]->english)<(s[y]->english))
t=y;
if(t!=x)
{
b=*s[t];
*s[t]=*s[x];
*s[x]=b;
}
}
}

if(i==0)
cout<<"管理系统中没有录入数据或者数据已经被删除！";
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<<"物理："<<" "<<s[k]->physics<<"生物："<<" "<<s[k]->biology<<"化学："<<" "<<s[k]->chemistry<<"总分："<<" "<<s[k]->getsum()
<<"平均分："<<" "<<s[k]->getaver()<<endl;
}
}
break;
}
case '13':
{
int t;stu b;

cout<<"本系统所以学生化学排名如下："<<endl;
for(int x=0;x<i-1;x++)
{
t=x;
for(int y=x+1;y<i;y++)
{
if((s[t]->chemistry)<(s[y]->chemistry))
t=y;
if(t!=x)
{
b=*s[t];
*s[t]=*s[x];
*s[x]=b;
}
}
}

if(i==0)
cout<<"管理系统中没有录入数据或者数据已经被删除！";
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<<"物理："<<" "<<s[k]->physics<<"生物："<<" "<<s[k]->biology<<"化学："<<" "<<s[k]->chemistry<<"总分："<<" "<<s[k]->getsum()
<<"平均分："<<" "<<s[k]->getaver()<<endl;
}
}
break;
case '12':
{
int t;stu b;

cout<<"本系统所以学生生物排名如下："<<endl;
for(int x=0;x<i-1;x++)
{
t=x;
for(int y=x+1;y<i;y++)
{
if((s[t]->biology)<(s[y]->biology))
t=y;
if(t!=x)
{
b=*s[t];
*s[t]=*s[x];
*s[x]=b;
}
}
}

if(i==0)
cout<<"管理系统中没有录入数据或者数据已经被删除！";
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<<"物理："<<" "<<s[k]->physics<<"生物："<<" "<<s[k]->biology<<"化学："<<" "<<s[k]->chemistry<<"总分："<<" "<<s[k]->getsum()
<<"平均分："<<" "<<s[k]->getaver()<<endl;
}
}
break;
case '11':
{
int t;stu b;

cout<<"本系统所以学物理排名如下："<<endl;
for(int x=0;x<i-1;x++)
{
t=x;
for(int y=x+1;y<i;y++)
{
if((s[t]->physics)<(s[y]->physics))
t=y;
if(t!=x)
{
b=*s[t];
*s[t]=*s[x];
*s[x]=b;
}
}
}

if(i==0)
cout<<"管理系统中没有录入数据或者数据已经被删除！";
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<<"物理："<<" "<<s[k]->physics<<"生物："<<" "<<s[k]->biology<<"化学："<<" "<<s[k]->chemistry<<"总分："<<" "<<s[k]->getsum()
<<"平均分："<<" "<<s[k]->getaver()<<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<<"请输入操作代码(0 录入/4 按总分查询/5 按姓名查询/1 增加人员/2 删除人员/3 修改数据/6 显示所有成员数据/7 按总分排名/8 按语文排名/9按数学排名/y按英语排名/p按物理排名/b按生物排名/c按化学排名)"<<endl;
cin>>p;
}while(w=='y');
for(int x=0;x<i;x++)
{
delete s[x];
cout<<"delete all members!"<<endl;
}

}

 

编译器上面显示的我去改，但我不知道怎么改，我认为是对的，麻烦各位大哥看看
--------------------Configuration: sdasdas - Win32 Debug--------------------
Compiling...
sdasdas.cpp
f:\dadsadasdasda\sdasdas.cpp(327) : error C2143: syntax error : missing ';' before 'string'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2018: unknown character '0xce'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2018: unknown character '0xef'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2018: unknown character '0xc0'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2018: unknown character '0xed'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2018: unknown character '0xa3'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2018: unknown character '0xba'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2018: unknown character '0xc9'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2018: unknown character '0xfa'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2018: unknown character '0xce'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2018: unknown character '0xef'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2018: unknown character '0xa3'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2018: unknown character '0xba'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2018: unknown character '0xbb'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2018: unknown character '0xaf'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2018: unknown character '0xd1'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2018: unknown character '0xa7'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2018: unknown character '0xa3'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2018: unknown character '0xba'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2018: unknown character '0xd7'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2018: unknown character '0xdc'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2018: unknown character '0xb7'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2018: unknown character '0xd6'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2018: unknown character '0xa3'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2018: unknown character '0xba'
f:\dadsadasdasda\sdasdas.cpp(327) : error C2001: newline in constant
f:\dadsadasdasda\sdasdas.cpp(328) : error C2296: '<<' : illegal, left operand has type 'char [81]'
f:\dadsadasdasda\sdasdas.cpp(328) : error C2297: '<<' : illegal, right operand has type 'char [9]'
f:\dadsadasdasda\sdasdas.cpp(429) : error C2046: illegal case
f:\dadsadasdasda\sdasdas.cpp(461) : error C2046: illegal case
f:\dadsadasdasda\sdasdas.cpp(493) : error C2046: illegal case
执行 cl.exe 时出错.

sdasdas.exe - 1 error(s), 0 warning(s)