function using class

 #include<iostream>

#include<conio.h>

using namespace std;

class student

{

int rno;         //roll number

int s1,s2,s3,s; //nt marks s1,s2,s3

char name;

int total;

float percentage;   //percentage

public:

void getData()         //implicit fuction

{

cout<<"\n Entar the student roll number:";

cin>>rno;

cout<<"\n Enter the student name:";

cin>>name;

cout<<"\n Entar the marks of three subjects";

cin>>s1>>s2>>s3;

cout<<endl;

}

void calculate()

{

total=s1+s2+s3;

percentage=total/3;

}

void display()

{

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

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

cout<<"total marks:"<<total<<endl;

cout<<"percentage:"<<percentage;

}

};

   int  main()

   {

    student s;

   

    s.getData();

    s.calculate();

    s.display();

    getch();

   

   

   }