2010 Final IPE_UNIXC_-1151b question 3

//student.h

class student
{
private :
int studentno;
char name[20];
int year;
int semester;
int marks[5];
char grade[5];
double avgmarks;
public :
student(int pstudentno,int psemester,char pname[],int pyear);
void inputmarks();
void findgrades();
void calavgmarks();
void displaystudentdetails();




};

//student.cpp

#include "student.h"
#include <cstring>
#include <iostream>
using namespace std;

student::student(int pstudentno,int psemester,char pname[],int pyear)
{    
      studentno=pstudentno;
      semester=psemester;
      strcpy(name,pname);
      year=pyear;
}

void student::inputmarks()
{
      for(int i=0;i<5;i++)
      {
      cout<<"Enter mark  "<<i+1<<"  ";
      cin>>marks[i];

      }

}
void student::findgrades()
{    
      for(int i=0;i<5;i++)
        {
      if(marks[i]>=75 && marks[i]<=100)
        {
      grade[i]='A';
       
      }
      else if(marks[i]<75 && marks[i]>=60)
        {       
        grade[i]='B';
       
        }
      else if(marks[i]<60 && marks[i]>=45)
        {       
        grade[i]='S';
       
        }
      else if(marks[i]<45)
        {       
        grade[i]='F';
       
        }


      }

     
}
void student::calavgmarks()
{     float sum=0;
      for(int i=0;i<5;i++)
        {
        sum=sum+marks[i];

      }
      avgmarks=sum/5.0;
}    
void student::displaystudentdetails()
{
      cout<<"student no   : "<<studentno<<endl;
      cout<<"student name : "<<name<<endl;
      cout<<"year         : "<<year<<endl;
      cout<<"semester     : "<<semester<<endl;

      cout<<"\t"<<"module1  "<<"module2  "<<"module3  "<<"module4  "<<"module5"<<endl;
      cout<<"marks   "<<marks[0]<<"\t     "<<marks[1]<<"\t     "<<marks[2]<<"\t     "<<marks[3]<<"\t     "<<marks[4]<<endl;
      cout<<"Grade   "<<grade[0]<<"\t     "<<grade[1]<<"\t     "<<grade[2]<<"\t     "<<grade[3]<<"\t     "<<grade[4]<<endl;
      cout<<"Average marks =  "<<avgmarks<<endl;

}



//paperlb_3.cpp

#include "student.h"

#include <iostream>
using namespace std;
int main()
{
      student s1(10,1,"Saman",1);
      s1.inputmarks();
      s1.findgrades();
      s1.calavgmarks();
      s1.displaystudentdetails();


      return 0;
}