fgets executing before printf or scanf statement

Question

I'm fairly new to C and I have this program, and whenever I execute it, I get a weird output, like if fgets was bypassing and taking priority over printf and scanf

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

struct object {
   float weight;
   char name[30];
   char utility[30]; 
};

int main()
{
    struct object *ptr;
    int i, n;

    printf("Enter the number of objects: ");
    scanf("%d", &n);

    ptr = (struct object*) malloc(n * sizeof(struct object));

    for(i = 0; i < n; ++i)
    {
        printf("Enter name: ");
        scanf("%s\n", (ptr+i)->name);

        printf("Enter weight: ");
        scanf("%f\n", &(ptr+i)->weight);

        printf("Enter Utility: ");
        fgets((ptr+i)->utility, 30, stdin);
        (ptr+i)->utility[strlen((ptr+i)->utility)-1] = '\0';
    }

    printf("\nDisplaying Information:\n");
    for(i = 0; i < n; ++i)
        printf("Name: %s\tUtility: %s\tWeight: %0.1f\n", (ptr+i)->name, (ptr+i)->utility, (ptr+i)->weight);

    return 0;
}

Output

Enter the number of objects: 1   
Enter name: name
utility
Enter weight: Enter Utility: 
Displaying Information:
Name: name      Utility: utility        Weight: 0.0

I've tried what suggested in fgets() not waiting for input but nothing worked, even printing to stderr.

EDIT: I've manage to fix it the following way. Thanks for the help!

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

struct object {
   float weight;
   char name[30];
   char utility[30]; 
};

int main()
{
    struct object *ptr;
    int i, n;

    printf("Enter the number of objects: ");
    scanf("%d", &n);

    ptr = (struct object*) malloc(n * sizeof(struct object));

    for(i = 0; i < n; ++i)
    {
        printf("Enter name: ");
        scanf("%s", &ptr[i].name);

        printf("Enter weight: ");
        scanf("%f", &ptr[i].weight);

        while ((getchar()) != '\n');
        printf("Enter Utility: ");
        fgets(ptr[i].utility, 30, stdin);
        ptr[i].utility[strlen(ptr[i].utility)-1] = '\0';
    }

    printf("\nDisplaying Information:\n");
    for(i = 0; i < n; ++i)
        printf("Name: %s\tUtility: %s\tWeight: %0.1f\n", ptr[i].name, ptr[i].utility, ptr[i].weight);

    return 0;
}