자바 간단 한 마 트 프로그램 구현

package person;

public class Customer {
 public String name;
 public double money;
 public boolean isDrivingCar;
}

package supermarket;

public class LittleSuperMarket {
 public String superMarketName;
 public String address;
 public int parkingCount;
 public double incomingSum;
 public Merchandise[] merchandises;
 public int[] merchandisesold;
}

package supermarket;

public class Merchandise {
 public String name;
 public String id;
 public int count;
 public double soldPrice;
 public double purchasePrice;
}

import person.Customer;
import supermarket.LittleSuperMarket;
import supermarket.Merchandise;

import java.util.Scanner;

public class Run {
 public static void main(String[] args) {

  //            
  LittleSuperMarket littleSuperMarket = new LittleSuperMarket();

  //       
  littleSuperMarket.address = "    999 ";
  littleSuperMarket.superMarketName = "    ";
  littleSuperMarket.parkingCount = 200;

  //       new     200   ，   Merchandise
  littleSuperMarket.merchandises = new Merchandise[200];
  //                      
  littleSuperMarket.merchandisesold = new int[littleSuperMarket.merchandises.length];


  //  
  for (int i = 0; i < littleSuperMarket.merchandises.length; i++) {
   //     merchandise     m，     
   Merchandise m = new Merchandise();
   m.count = 200;
   m.id = "ID" + i;
   m.name = "  " + i;
   m.purchasePrice = 200 * Math.random();
   m.soldPrice = (1 + Math.random()) * m.purchasePrice;

   //                merchandise  ，    merchandise   
   littleSuperMarket.merchandises[i] = m;

  }
  System.out.println("     ！! ！");


  boolean open = true;
  Scanner scanner = new Scanner(System.in);


  while (open) {
   System.out.println("    ：" + littleSuperMarket.superMarketName);
   System.out.println("    ：" + littleSuperMarket.address);
   System.out.println("      ：" + littleSuperMarket.parkingCount);
   System.out.println("       ：" + littleSuperMarket.incomingSum);
   System.out.println("    ：" + littleSuperMarket.merchandises.length + " ");


   //        
   Customer customer = new Customer();
   customer.name = "  ：" + ((int) (Math.random() * 500));
   customer.isDrivingCar = Math.random() > 0.4;
   customer.money = (1 + Math.random()) * 10000;


   //         
   if (customer.isDrivingCar) {
    System.out.println("    " + customer.name + "        ！");
    //           >0，    ，        （     ，      ）
    if (littleSuperMarket.parkingCount > 0) {
     littleSuperMarket.parkingCount--;
     System.out.println("    " + customer.name + "      " + littleSuperMarket.superMarketName + ",    " + littleSuperMarket.parkingCount + "，    " + customer.money);
    } else {
     System.out.println("   ，     ，      ");
     continue;
    }
    //   ，    
   } else {
    System.out.println("    " + customer.name + "      " + littleSuperMarket.superMarketName + "    " + customer.money);
   }


   //                      
   double totalCast = 0;
   int numToBuy;


   //    
   while (true) {


    System.out.println("    " + littleSuperMarket.merchandises.length + "   ，    。       :");


    int InDex = scanner.nextInt();
    //             
    if (InDex <= 0) {
     break;
    }
    if (InDex > littleSuperMarket.merchandises.length - 1) {
     System.out.println("   ，         。   0 " + (littleSuperMarket.merchandises.length - 1) + "     ");
     continue;
    }


    System.out.println("          :" + littleSuperMarket.merchandises[InDex].name + "\t   ：" + littleSuperMarket.merchandises[InDex].soldPrice);
    System.out.println("       ？");

    numToBuy = scanner.nextInt();
    //             
    if (numToBuy <= 0) {
     System.out.println("      ，      ");
     continue;
    }
    if (numToBuy > littleSuperMarket.merchandises[InDex].count) {
     System.out.println("         ，      ");
     continue;
    }
    /*          ，      ，                  。                     ，      if               。
                           ，        ，    。               
     */

    //    ，     ，             
    totalCast += littleSuperMarket.merchandises[InDex].soldPrice * numToBuy;
    littleSuperMarket.merchandises[InDex].count -= numToBuy;


    //         ，                    
    if (customer.money < totalCast) {

     System.out.println("   ，              ，      ");
     //      ，                          
     //          ，      ，         ，        ，        ，     ，             ，       
     littleSuperMarket.merchandises[InDex].count += numToBuy;
     //              
     //          ，                           ，          ，           
     totalCast = 0;

    } else {
     //    ，        ，           
     littleSuperMarket.merchandisesold[InDex] += numToBuy;
     customer.money -= totalCast;

     //     ，    ，    
     if (customer.isDrivingCar) {
      littleSuperMarket.parkingCount++;
     }
    }
   }

   littleSuperMarket.incomingSum += totalCast;
   //      ，           totalCast   littleSuperMarket.incomingSum ，      
   //littleSuperMarket.incomingSum totalIncoming    ，       
   //littleSuperMarket.incomingSum += totalCast;

   System.out.println("  " + customer.name + "       " + totalCast + "，   " + customer.money);
   System.out.println("         ？");
   open = scanner.nextBoolean();
  }

  System.out.println("     ！");
  System.out.println("        " + littleSuperMarket.incomingSum + "      ：");


  //          
  double totalNetIncoming = 0;
  double totalIncoming = 0;


  for (int i = 0; i < littleSuperMarket.merchandisesold.length; i++) {
   //         0   
   if (littleSuperMarket.merchandisesold[i] > 0) {
    //          ，      
    double incoming = littleSuperMarket.merchandises[i].soldPrice * littleSuperMarket.merchandisesold[i];
    double netIncoming = (littleSuperMarket.merchandises[i].soldPrice - littleSuperMarket.merchandises[i].purchasePrice) * littleSuperMarket.merchandisesold[i];
    totalIncoming += incoming;
    totalNetIncoming += netIncoming;
    System.out.println(littleSuperMarket.merchandises[i].name + "   " + littleSuperMarket.merchandisesold[i] + " 。    " + incoming + ",    " + netIncoming);

   }
  }
  System.out.println("       ：" + totalIncoming + ";       ：" + totalNetIncoming);
 }
}