โปรแกรมขายโดนัท ภาษาซี (Doughnut sales in c code)

/*http://www.vcharkarn.com/vcafe/149496/*

#include <stdio.h>
#include <conio.h>
int main()
{
   int choice,a,c,m,n,x,z;
   float b,d,y,t;
   
   printf("\n\n#####***** W E L C O M E  T O  S U C K E R  D O N U T  S H O P *****#####\n\n");
   printf("\n\nThere are two types of donuts to choose from.\n\n");
   printf("\n\nPlease select your choice from the menu: \n\n");
   printf("\n\n1. Original\n\n");
   printf("\n\n2. Mix\n\n");
   scanf("%d",&choice);
   
   if(choice == 1){
   printf("\n\nPlease select your choice from the menu: \n\n");
   printf("\n\n1. Per dozen = 100 Bath\n\n");
   printf("\n\n2. Each piece = 12 Bath\n\n");
   scanf("%d",&n);
   
   if(n == 1){
   printf("Enter your required number: ");
   scanf("%d",&x);
   
   y = x*100;
   
   printf("\n\n %d dozen donuts a price = %f", x,y);
   }
   
   if(n == 2){
   printf("\n\nEnter your required number: ");
   scanf("%d",&z);
   
   t = z*12;
   
   printf("\n\n %d piece donuts a price = %f", z,t);
   }
   }
   if(choice == 2){
   printf("\n\nPlease select your choice from the menu: \n\n");
   printf("\n\n1. Per dozen = 200 Bath\n\n");
   printf("\n\n2. Each piece = 20 Bath\n\n");
   scanf("%d",&m);
   
   if(m == 1){
   printf("Enter your required number: ");
   scanf("%d",&a);
   
   b = a*200;
   
   printf("\n\n %d dozen donuts a price = %f", a,b);
   }
   
   if(m == 2){
   printf("\n\nEnter your required number: ");
   scanf("%d",&c);
   
   d = c*20;
   
   printf("\n\n %d piece donuts a price = %f", c,d);
   }
   }
   getch();
}