Membuat Menu Restaurant (SWITCH, CASE, RETURN)

#include<stdio>

using namespace std;

int main()
{
    int makanan, minuman, jmlh_beli, a, b, c, d, e, f, total1, total2, total_bayar;
    char x;
    printf("Warung Lesehan\n");
    printf("Pilihan Menu\n");
    printf("1. Nasi Goreng\n");
    printf("2. Roti Bakar\n");
    printf("3. Ayam Goreng Mentega\n");
    printf("Pesanan Makanan (1-3) : ");
    scanf("%d",&makanan);
    switch(makanan)
    {
     Case 1:
            printf("Nasi Goreng\n");
            printf("Harga : 15000\n");
            a=15000;
            printf("\n jumlah pembelian : ");
            scanf("%d",&jmlh_beli);
            total1=jmlh_beli*a;
            printf("total makanan %d\n", total1);
            printf(" ***************\n");
            break;
            Case 2:
                   printf("Roti Bakar\n");
                   printf("Harga : 10000\n");
                   b=10000;
                   printf("\n jumlah pembelian : ");
                   scanf("%d",&jmlh_beli);
                   total1=jmlh_beli*a;
                   printf("total makanan %d\n", total1);
                   printf(" ***************\n");
                   break;
                   Case 3:
                          printf("Ayam Goreng Mentega\n");
                          printf("Harga : 20000\n");
                          b=20000;
                          printf("\n jumlah pembelian : ");
                          scanf("%d",&jmlh_beli);
                          total1=jmlh_beli*a;
                          printf("total makanan %d\n", total1);
                          printf("***************\n");
                          break;
     }
     printf("Menu Minuman\n");
     printf("Pilihan Menu\n");
     printf("4. Jus Melon\n");
     printf("5. Jus Mangga\n");
     printf("6. Es Lemon Tea\n");
     printf("Pesan Minuman (4-6) : ");
     scanf("%d",&minuman);
     switch(minuman)
     {
      Case 4:
             printf("Jus Melon\n");
             printf("Harga : 6000\n");
             d=6000;
             printf("\n jumlah pembelian : ");
             scanf("%d",&jmlh_beli*d);
             total2=jmlh_beli*d;
             printf("total minuman %d\n", total2);
             printf("***************\n");
             break;
             Case 5:
                    printf("Jus Mangga\n");
                    printf("Harga : 6000\n");
                    e=6000;
                    printf("\n jumlah pembelian : ");
                    scanf("%d",&jmlh_beli*d);
                    total2=jmlh_beli*d;
                    printf("total minuman %d\n", total2);
                    printf("***************\n");
                    break;
                    Case 6:
                           printf("Es Lemon Tea\n");
                           printf("Harga : 5000\n");
                           f=5000;
                           printf("\n jumlah pembelian : ");
                           scanf("%d",&jmlh_beli*d);
                           total2=jmlh_beli*d;
                           printf("total minuman %d\n", total2);
                           printf("***************\n");
                           break;
     }
      total_bayar = total1+total2;
      printf("total pembayaran %d",total_bayar);
      printf("Ada yang ingin dipesan lagi : ");
      scanf("%d",&x);
      if(x=="y" || x=="Y")
     {
      printf("mulai");
     }
      else
      if(x=="n" || x=="N")
     {
      printf("selesai");
     }
      selesai
      return(0);
}