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import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStreamReader;
public class 輕輕巧巧 {
 public static void main(String[] args)  throws IOException {
  BufferedReader reader = new BufferedReader(new InputStreamReader(
    System.in));
  int a = 0;
  int b = 0;
  int c = 0;
  System.out.println("請(qǐng)輸出結(jié)賬員需要接待的顧客次數(shù)：");
  a = Integer.parseInt(reader.readLine());
  for(int i = 0; i < a; i++) {
   b = 0;
   do {
    System.out.println("請(qǐng)輸出商品的單價(jià)：");
    int d = Integer.parseInt(reader.readLine());
    if(d < 0) {
     System.out.println("商品的單價(jià)不能小于0！");
     hasMoreGoods = 1;
     continue;
    }
         System.out.println("請(qǐng)輸入商品的數(shù)量：");
         int amount = Integer.parseInt(reader.readLine());
         if(d < 0) {
          System.out.println("商品數(shù)量不能小于0！");
          hasMoreGoods = 1;
          continue;
         }
         totalCost = totalCost + d * amount;
         System.out.println("當(dāng)前總價(jià)為：" + totalCost);
               System.out.println("還有商品需要結(jié)算嗎（輸入1為有，" +
                 "其它數(shù)字為沒(méi)有）？");
         hasMoreGoods = Integer.parseInt(reader.readLine());
   
   } while (haMoreGoods == 1);
        System.out.println("本次消費(fèi)為：" + totalCost);
        System.out.println("=====謝謝光臨，歡迎下次再來(lái)！=====");
    
  } 
  System.out.println(serveTimes + "次結(jié)算已經(jīng)結(jié)束，結(jié)賬員可以休息啦！");
 }
}