顺序表设计一个学生成绩系统

#include<iostream.h>
class Student
{
int number[20];
char* name[20];
char* Class[20];
float math_grade[20];
int length;
public:
Student(){length=0;}
Student(char*n[],char*c[],int num[],float m[],int l);
~Student(){}
void Insert(char*n,char*c,int num,float m,int l);//姓名，班级，学号，成绩
void Delete(int l);


void Locate(int l);
void Print();
};


Student::Student(char*n[],char*c[],int num[],float m[],int l)
{
for(int i=0;i<4;i++)
{
name[i]=n[i];
        Class[i]=c[i];
        number[i]=num[i];
        math_grade[i]=m[i];
}
length=l;
 }




void Student::Insert(char*n,char*c,int num,float m,int l)
{
length++;
if(length>=20) cout<<"数据已满."<<endl;
if(l<1||l>length+1) cout<<"位置非法"<<endl;
for(int i=length;i>l;i--)
{
name[i-1]=name[i-2];
Class[i-1]=Class[i-2];
        number[i-1]=number[i-2];
        math_grade[i-1]=math_grade[i-2];
}
        name[i-1]=n;
Class[i-1]=c;
        number[i-1]=num;
        math_grade[i-1]=m;
cout<<"  列入成功."<<endl;
}




void Student::Delete(int l)
 {

if(length==0) cout<<"无数据."<<endl;
else if(l<1||l>length) cout<<"位置错误."<<endl;
    else
{
cout<<name[l-1]<<"的数据已被删除."<<endl;
        for(int i=l;i<length;i++)
{
   name[i-1]=name[i];
   Class[i-1]=Class[i];
           number[i-1]=number[i];
           math_grade[i-1]=math_grade[i];
} 
length--;
}
}
void Student::Locate(int l)
{
    if(length==0) cout<<"无数据"<<endl;
    else if(l<1||l>length) cout<<"位置错误"<<endl;
    else
{
cout<<"第"<<l<<"位的数据为:"<<endl;
cout<<"姓名:"<<name[l-1]<<endl;
cout<<"班级"<<Class[l-1]<<endl;
cout<<"学号"<<number[l-1]<<endl;
        cout<<"数学成绩"<<math_grade[l-1]<<endl;
cout<<endl;
}
}
void Student::Print()
{
int i;
    if(length==0) cout<<"无数据."<<endl;
else
{
   cout<<"姓名      班级      学号    数学成绩"<<endl;
   for(i=0;i<length;i++)
   {
cout<<name[i]<<"    ";
cout<<Class[i]<<"    ";
cout<<number[i]<<"     ";
cout<<math_grade[i]<<endl;
   }
}
}

int main()
{
int p;
int y;
float z;
    char x[5];
char r[10];
char*n[4]={"小明","小红","小花","小青"};
char*c[4]={"信管1171","信管1172","计科1171","信管1161"};
int num[4]={2011,2012,2014,2017};
float m[4]={80,90,100,89.5};
Student a(n,c,num,m,4);
    cout<<"录入的数据为:"<<endl;
    a.Print();
cout<<endl;
cout<<"插入数据"<<endl;
cout<<endl;
    cout<<"输入你要列入的姓名:";
    cin>>x;
    cout<<"输入你要列入的班级:";
    cin>>r;
cout<<"输入你要列入的学号:";
    cin>>y;
cout<<"输入你要列入的数学成绩:";
    cin>>z;
    cout<<"输入你要列入的位置:";
cin>>p;
cout<<endl;
a.Insert(x,r,y,z,p);
a.Print();
cout<<endl;
cout<<"要删除的位置:";
cin>>p;
a.Delete(p);
cout<<endl;
cout<<"要查找的数据的位置:";
cin>>p; 
a.Locate(p);
cout<<endl;
cout<<"各成员数据如下:"<<endl;
a.Print();
    return 0;
}

运行结果：