class student{
// here u set ur private member
string studnt name;
string id;
double gpa;
char grade;
public:
// here goes ur functions;
void checkInput();
/* u can review the ascci table if the entry is not valid use while loop to ask the user to enter the name again*/
student(); // default constructor
student(string, name, string id, double gpa;char grade);
//constructor with parameters;
.... any other functions u wanna put in
};

cout << "Please enter the Student Number: \n";
     getline(cin, studentNumber);
     
     length = studentNumber.length();
     if (length == 9)
     {
                strcpy(studentNum, studentNumber.c_str()); // converts string to character array.
                if (testStudent(studentNum, SIZE)) //boolean function to validate alpha/digit.
                cout << "GREAT" << endl;
                else
                cout << "WRONG" << endl;
                cout << "That is not a valid student Number \n"; 
     }

             
}        
bool testStudent(char number[],int SIZE)
{
     for (int count = 0; count < 10; count++)
     {
         if(!isalpha(number[count]) && isdigit(number[count]))
         return false;
     }
     return true;
           
}

#include<string>
using namespace std;
class student
{
string student_number;
string student_name;
// here you will use that for a dynamic array to enter as many classes the user want;
string * student_classes;
int student_credit;
char student_grade;
int student_NumOfClasses;
public:
// constructor with parameter;
student(string number,string name,int credit,char grade,int NumOfClasses );
//constructor with no parameters;
student();
~student();
void print();
};

#include<iostream>
#include"student.h"
using namespace std;
void student::print()
{
cout<<student_number<<"	"<<student_name<<"	"<<student_credit
<<"	"<<student_grade<<endl;
for(int i=0;i<student_NumOfClasses;i++)
cout<<student_classes[i]<<endl;
}
student::student() 
{
student_number=" ";
student_name=" ";
student_classes=new string;
*student_classes ="No data available";
student_credit=0;
student_grade=' ';
student_NumOfClasses=0;
}
student::student(string number,string name,int credit,char grade,int NumOfClasses)
{
	student_number=number;
	student_name=name;
	student_credit=credit;
	student_grade=grade;
	student_NumOfClasses=NumOfClasses;
	student_classes=new string[NumOfClasses];
	cout<<"Please enter all the classes youv are enrolled in ?"<<endl;
for(int i=0;i<student_NumOfClasses;i++)
{cin>>student_classes[i];}
cout<<endl;
}
student::~student()
{
delete [] student_classes;
}

#include<iostream>
#include"student.h"
using namespace std;
int main()
{ 
// this is a sample print for you to see what is the output
student sample("102-43512","OCICAT",4,'A',3);
sample.print();
cout<<"***************This is how it works in a loop***********"<<endl;
char ch='0';
string number,name;
int credit,numClasses;
char grade;
while(ch !='*')
{
/*please enter only the correct data or the while loop will be infinite*/
cout<<"Enter Student Number ?"<<endl;
cin>>number;
cout<<"Enter Student Name ?"<<endl;
cin>>name;
cout<<"Enter Student Total Credit Hours ?"<<endl;
cin>>credit;
cout<<"Enter Student Grade ?"<<endl;
cin>>grade;
cout<<"Enter Student Number of classes the student is enrolled in ?"<<endl;
cin>>numClasses;
cout<<endl;
student temp(number,name,credit,grade,numClasses);
temp.print();
cout<<"Do you want to continue"<<endl;
cin>>ch;
}
	return 0;
}

string name,temp;
 cin>>temp;
 if(temp.length()==9)
  {
    for(int i=0;i<9;i++)
    {
      if(temp[i]>=48 ||temp[i]<=57)
      name = temp;
      else
      cout<<"Your entry should include only digit"<<endl;
     }
  }

  else
   cout<<"Your entry should be 9 digit format"<<endl;