C++ programme using a class student to calculate the percentage of marks obtained by him

#include<iostream.h>

#include<conio.h>

class student

{

               int roll_no;

               char name[20];

               char class_st[8];

               int marks[5];

               float percentage;

               float calculate();

               public:

               void readmarks();

               void displaymarks();

};

float student::calculate()

{

               percentage=0;

               for(int i=0;i<5;i++)

                              percentage+=marks[i];

               percentage=(percentage/5);

               return percentage;

}

void student::readmarks()

{

               cout<<"Enter the roll no.:";

               cin>>roll_no;

               cout<<"Enter the name:";

               cin>>name;

               cout<<"Enter the class studing in:";

               cin>>class_st;

               cout<<"Enter the marks:"<<endl;

               for(int j=0;j<5;j++){

                              cout<<"\tEnter mark "<<j+1<<":";

                              cin>>marks[j];

               }

}

void student::displaymarks()

{

               cout<<"Roll no:"<<roll_no<<endl;

               cout<<"Name:"<<name<<endl;

               cout<<"Class:"<<class_st<<endl;

               cout<<"Percentage:"<<calculate()<<endl;

}

int main()

{

               student s1;

               s1.readmarks();

               s1.displaymarks();

               return 0;

}

OUTPUT:

Enter the roll no.:12

Enter the name:KARTHIK                                                          

Enter the class studing in:12                                                  

Enter the marks:                                                               

        Enter mark 1:99                                                         

        Enter mark 2:95                                                        

        Enter mark 3:90                                                        

        Enter mark 4:80                                                         

        Enter mark 5:99                                                        

Roll no:12                                                                     

Name:KARTHIK                                                                    

Class:12                                                                       

Percentage:92.599998