test 4

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

struct Node {
    int Data;
    int stock;
    int price;
    char pname[30];
    struct Node *next;
} *rear, *front = NULL;

void tampil(){
    printf("BLUE MOTORCYCLE PARTS\n");
    printf(". . . . . . . . . . . .\n");
    printf("\n1. View Order List");
    printf("\n2. Add New Order");
    printf("\n3. Take Order");
    printf("\n4. Exit\n");
}


void delQueue()
{
    int del;
    struct Node *temp, *var = rear;
    if (var == rear)
    {
        system("cls");
        tabel();
        printf("\n\n\nInput Number of Order [1...4] : ");
        scanf("%d",&del);
        rear = rear->next;
        free(var);


    }
    else{
        printf("\n--- There is no order in the list ---");
    }
}

void push(int value)
{
    struct Node *temp;
    temp = (struct Node *) malloc(sizeof(struct Node));
    temp->Data = value;
    if (front == NULL)
    {
        front = temp;
        front->next = NULL;
        rear = front;
    }
    else
    {
        front->next = temp;
        front = temp;
        front->next = rear;
    }
}

void display()
{
    struct Node *var = rear;
    if (var != NULL)
    {
        system("cls");
        tampil();

        tabel();
        while (var != front)
        {
            printf("\t%d", var->Data);
            var = var->next;
        }
        if (var == front)
        {
            printf("\t%d", var->Data);
        }
        printf("\n");
    }
    else{
        system("cls");
        printf("\nQueue is Empty\n");
    }
}



void tabel(){
    int quan,harga;
    char name[30];
printf("\t\t--- Order List ---\n");
printf("-+------+-------------------------------+----------+------------+-\n");
printf(" | No.  | Name Of Parts\t\t\t| Quantity | Unit Price |\n");
printf("-+------+-------------------------------+----------+------------+-\n");
printf(" |   1. | %c\t\t\t|     3    |  450000    |\n");
printf(" |   2. | disk brake\t\t\t|     2    |  450000    |\n");
printf(" |   3. | head lamp\t\t\t|     4    |  450000    |\n");
printf(" |   4. | spion\t\t\t\t|     3    |  450000    |\n");
printf("-+------+-------------------------------+----------+------------+-\n");

}


int main()
{
    tampil();
    int i = 0;
    front = NULL;
    while (1)
    {
        printf(" \n>> Input Choice : ");
        scanf("%d", &i);
        switch (i)
        {
            case 1:
            {
                system("cls");
                display();
                break;
            }
            case 2:
            {
                int value;
                printf("\nInput the name of motorcycle's parts [3...30] : ");
                scanf("%d", &value);
                if( value != 3 || value <= 20){
                    printf("Type [3...30] parts name : ");
                    scanf("%d",&value);
                }
                printf("Input Quantity of Motorcycle's parts [1...20] : ");
                scanf("%d",&value);
                push(value);
                display();
                break;
            }
            case 3:
            {
                delQueue();
                display();
                break;
            }
            case 4:
            {
                system("cls");
                printf("Thank You");
                exit(0);

            }
            default:
            {
                system("cls");
                printf("\nWrong choice for operation\n");
            }
        }
    }
}