#include <stdio.h>
 
// Define structure
struct Student {
    int roll;
    char name[50];
    float marks;
};
 
int main() {
    struct Student s1, *ptr;
 
    // Assign pointer to structure variable
    ptr = &s1;
 
    // Input student details using pointer
    printf("Enter Roll Number: ");
    scanf("%d", &ptr->roll);
    printf("Enter Name: ");
    scanf("%s", ptr->name);
    printf("Enter Marks: ");
    scanf("%f", &ptr->marks);
 
    // Display student details using pointer
    printf("\n--- Student Details ---\n");
    printf("Roll Number: %d\n", ptr->roll);
    printf("Name: %s\n", ptr->name);
    printf("Marks: %.2f\n", ptr->marks);
 
    return 0;
}