Implement simple structure programs using pointers in C++

Code

#include <iostream>

using namespace std;

struct student{
    int roll;
    char name[20];
    float marks;
};

int main(){
    student s1;
    student *ptr;
    ptr = &s1;
    cout << "Enter the roll number: ";
    cin >> ptr->roll;
    cout << "Enter the name: ";
    cin >> ptr->name;
    cout << "Enter the marks: ";
    cin >> ptr->marks;
    cout << "The details of the student are: " << endl;
    cout << "Roll number: " << ptr->roll << endl;
    cout << "Name: " << ptr->name << endl;
    cout << "Marks: " << ptr->marks << endl;
}

Output

Enter the roll number: 142
Enter the name: Tony
Enter the marks: 99 
The details of the student are: 
Roll number: 142
Name: Tony
Marks: 99