C structure type variable declaration - arrays

Question

I have written a code for a ticket reservation halfway and I'm doubtful about the way i have used structures and arrays in my code. This code is not formatted properly because I am trying to see if this method of declaring "Bill" type variable will work or is this wrong?
the code gets compiled and runs successfully but I am doubtful whether my method is correct. Can anyone help? I just want to know whether the way I have declared structure type variables and used it is correct?Especially the last printf statement where I calculate the Amount.
#include<stdio.h>
#include<string.h>
#define SIZE 3
typedef struct
{
int billno;
char name[20];
char cat[20];
int type;
int range[3];
int tickets;
int class[3];
float price;
}Bill;
int main()
{
Bill array[3];
Bill d;
int input;
array[0].billno=6434;
strcpy(array[0].name,"Nimal");
strcpy(array[0].cat,"General");
array[0].type=1;
array[0].range[0]= 250;
array[0].range[1]= 0;
array[0].range[2]= 0;
array[0].price = 200;
array[1].billno=6065;
strcpy(array[1].name,"Kamal");
strcpy(array[1].cat,"Industrial");
array[1].type=2;
array[1].range[0]=622;
array[1].range[1]=1999;
array[1].range[2]=102;
array[1].price =125.60;
array[2].billno=7067;
strcpy(array[2].name,"Gayani");
strcpy(array[2].cat,"General");
array[2].type=2;
array[2].range[0]=220;
array[2].range[1]=350;
array[2].range[2]=10;
array[2].price = 86.90;
printf("****Main Menu****");
printf("1.Reserve a ticket:");
scanf("%d",&input);
if(input == 1)
{
printf("Enter your name: ");
scanf("%s", d.name);
printf("Enter the number of tickets you want");
scanf("%d",&d.tickets);
printf("Enter the number of tickets from first class");
scanf("%d",&d.class[0]);
printf("Enter the number of tcikets from second class");
scanf("%d",&d.class[1]);
printf("Enter the number of tickets from third class");
scanf("%d",&d.class[2]);
}
printf("\nReserve a ticket");
printf("\nName : %s",d.name);
printf("\nTickets from first class : %d",d.class[0]);
printf("Tickets from second class : %d\n",d.class[1]);
printf("Tickets from third class : %d\n",d.class[2]);
printf("\nConfirm the order? press Y if yes : ");
printf("Amount = %.2f ",d.class[0]*array[0].price+d.class[1]*array[1].price+d.class[2]*array[2].price);
return 0;
}