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package Test;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Scanner;
public class Test {
public static void main(String[] args) {
init();//初始化
Map<String,String> map = new LinkedHashMap<>();
while(true){
Scanner in= new Scanner(System.in);
map = buy(in,map);//选择
System.out.println();
System.out.println("还要继续购物吗?(Y/N)");
String jx = in.nextLine();
if(jx.equals("N")){
break;
}
}
print(map);
}
public static void print(Map<String, String> m){
System.out.println("\n\n\n******************");
System.out.println(" 购物车清单");
Integer hj = 0;
for (Entry<String, String> entry : m.entrySet()) {
String key = entry.getKey();
String value = entry.getValue();
if(key.equals("1")){
hj += Integer.parseInt(value)*3;
System.out.println("哇哈哈纯净水: "+value+"件,合计:¥"+Integer.parseInt(value)*3);
}else if(key.equals("2")){
hj += Integer.parseInt(value)*5;
System.out.println("康师傅方便面: "+value+"件,合计:¥"+Integer.parseInt(value)*5);
}else if(key.equals("3")){
hj += Integer.parseInt(value)*4;
System.out.println("可口可乐: "+value+"件,合计:¥"+Integer.parseInt(value)*4);
}
}
System.out.println("合计金额:¥"+hj);
}
public static void init(){
System.out.println("******************");
System.out.println("\t商品列表\n");
System.out.println(" 商品名称 价格");
System.out.println("1. 哇哈哈纯净水 ¥3");
System.out.println("2. 康师傅方便面 ¥5");
System.out.println("3. 可口可乐 ¥4");
System.out.println("******************");
}
public static Map<String,String> buy(Scanner scan,Map<String,String> m){
System.out.print("请输入编号:");
String bh = scan.nextLine();
System.out.print("请输入购买数量:");
String num = scan.nextLine();
if(m.size()>0 && m.keySet().contains(bh)){
m.put(bh,(Integer.parseInt(bh)+Integer.parseInt(num))+"");
}else{
m.put(bh, num);
}
return m;
}
}
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