#include <stdio.h>
#include <string.h>

// Define a structure
struct Student {
    int id;
    char name[50];
    float marks;
};

// Function to display student details
void displayStudent(struct Student s) {
    printf("\nStudent Details:\n");
    printf("ID: %d\n", s.id);
    printf("Name: %s\n", s.name);
    printf("Marks: %.2f\n", s.marks);
}

// Function to update marks
void updateMarks(struct Student *s, float newMarks) {
    s->marks = newMarks;
}

int main() {
    struct Student student1;

    // Input details
    printf("Enter ID: ");
    scanf("%d", &student1.id);

    printf("Enter name: ");
    scanf(" %[^\n]", student1.name);

    printf("Enter marks: ");
    scanf("%f", &student1.marks);

    // Display before update
    displayStudent(student1);

    // Update marks
    updateMarks(&student1, 95.0);

    // Display after update
    printf("\nAfter updating marks:\n");
    displayStudent(student1);

    return 0;
}