c++ file

#include <iostream>
using namespace std;
class record{
    int roll;
    char a[20];
    float marks[3];
public:
    void getdata();
    void putdata();

};
void record::getdata()
{
    cout<<"roll no.";
    cin>>roll;
    cout<<"name:";
    cin>>a[20];

    int i;
    for(i=0;i<=2;i++)
    {
        cin>>marks[i];
    }

}
void record::putdata()
{
    cout<<roll<<endl;
    cout<<a[20]<<endl;
    int i;
    cout<<"marks are:"<<endl;
    for(i=0;i<=2;i++)
    {
        cout<<marks[i]<<",";

    }


}
int main()
{
    record R[5];
    int i=0;
    for(;i<=4;i++)
    {
        R[i].getdata();

    }
    for(;i<=4;i++)
    {
        R[i].putdata();

    }


}