这道C++怎么改写
//想问的问题在注释里
#include<iostream.h>
#include<string.h>
#include<stdlib.h>
#include<fstream.h>
//想在这里增加 #define MIN 1
class student //学生类
{
char name[20];
char sex[5];
char number[20];
int score[4];
int total;
int average;
public:
void add();
void output();
student();
student &
operator=(student & T);
friend istream &
operator
>> (istream & scin, student &s1);
friend ostream &
operator
<< (ostream & scout, student &s2);
};
static
int n=0;
student stu[100];//想把这个改成student stu[MIN];
//在加上这句话 student *stu=new student[MIN];只是不知道该怎么加上去
//只是不知道如何加上去让程序能用指针动态分配内存,大家帮忙解决下啊~~谢谢拉
void menu() //菜单函数
{
cout<<endl<<endl;
cout<<endl<<endl;
cout<<"\t 设计: ************************* "<<endl;
cout<<"\t* * * * * * * * * * * * * * * * * * * * * * * * * *"<<endl;
cout<<"\t* 欢迎进入学生成绩管理系统 *"<<endl;
cout<<"\t* *"<<endl;
cout<<"\t* 1:输入 2:输出 3:退出 *"<<endl;
cout<<"\t* *"<<endl;
cout<<"\t* * * * * * * * * * * * * * * * * * * * * * * * * *"<<endl;
cout<<endl;
cout<<"请选择你需要的选项:";
}
void student::add() //添加函数
{
int cx;
cout<<"你想输入多少个学生的基本信息?"<<endl;
cin>>cx;
for(int i=0;i<cx;i++)
{
cout<<"请输入第"<<n+1<<"位学生信息"<<endl;
cin>>stu[n];
n++;
}
menu();
}
void student::output() //输出函数
{
if(n!=0)
{
cout<<" ---------------------------------------------------------------------------\n";
cout<<"学号"<<"\t"<<"姓名"<<"\t"<<"性别"<<"
"<<"高等数学"<<"
"<<"英语"<<"
"<<"大学体育"<<"
"<<"C++面向程序设计"<<"
"<<"总分"<<"
"<<"平均分"<<endl;
cout<<" --------------------------------------------------------------------------- \n";
for(int t=0;t<n;t++)
{
cout<<stu[t];
}
menu();
}
else cout<<"对不起，请先选择 1 输入数据"<<endl;
}
student & student::operator=(student & T) //重载=
{
strcpy(name,T.name);
strcpy(sex,T.sex);
strcpy(number,T.number);
for(int i=0;i<4;i++)score=T.score;
total=T.total;
average=T.average;
return ( *
this );
}
ostream &
operator
<< (ostream & scout, student &s2) //重载<<
{
cout<<"
"<<s2.number<<"
"<<s2.name<<"
"<<s2.sex<<"
"<<s2.score[0]
<<"
"<<s2.score[1]<<"
"<<s2.score[2]<<"
"<<s2.score[3]<<"
"<<s2.total<<"
"<<s2.average<<endl;
return scout;
}
istream &
operator
>> (istream & scin,student &s1) //重载>>
{
cout<<"学号"<<"\t"<<"姓名"<<"\t"<<"性别"<<"
"<<"高等数学"<<"
"<<"英语"<<"
"<<"大学体育"<<"
"<<"C++面向程序设计"<<endl;
scin>>s1.number>>s1.name>>s1.sex>>s1.score[0]>>s1.score[1]>>s1.score[2]>>s1.score[3];
s1.total=s1.score[0]+s1.score[1]+s1.score[2]+s1.score[3];
s1.average=s1.total/4;
return scin;
}
student::student() //构造函数
{
strcpy(name,"
");
strcpy(sex,"
");
strcpy(number,"
");
for(int i=0;i<4;i++)score=0;
total=0;
average=0;
}
void main()
{
student s;
menu();
char choice;
while(choice!=0)
{
cin>>choice;
switch(choice)
{
case
'1': s.add(); break;
case
'2': s.output(); break;
case
'3': return;break;
default :cout<<"您的输入有误，请重试！\n";
}
}
return;
}
