重新來下
import?java.util.Scanner;
public?class?Car?{
???????public?String?name;
???????public?int?money;
???????public?int?people;
???????public?int?things;
???????public?double?thing;
???????public?Car(String?name,?int?money,?int?people){
???? ???this.name=name;
???? ???this.money=money;
???? ???this.people=people;
???? ???System.out.println(???name??+?"??????"??+?money??+?"元/天"??+?"?????????"?+?"載人："?+?people?+?"人");
???????}
???????public?Car?(String?name,?int?money,?int?people,?int?things){
???? ???
???? ???this.name=name;
???? ???this.money=money;
???? ???this.people=people;
???? ???this.things=things;
???? ???System.out.println(?name?+??"?????????????????????????????"??+?money?+?"元/天"?+?"?????????"?+?"載人："?+?people?+?"人"?+?"?????????"?+?"載貨"?+?things?+?"噸"?);
???????}
???????
????public?Car?(String?name,?int?money,??double?thing){
???? ???
???? ???this.name=name;
???? ???this.money=money;
???? ???this.thing=thing;
???? ???System.out.println(??name?+??"???????????????????????"??+?money?+?"元/天"?+?"?????????"?+?"載貨:"?+?thing?+?"噸"?);
???????}
???????
???????
}import java.util.Scanner;
public class InitialCar {
public static void main(String[] args) {
// TODO Auto-generated method stub
? System.out.println("歡迎使用嗒嗒租車系統");
? ? System.out.println("你是否想要租車：1是 ? ?0否");
? ? Scanner scanner =new Scanner(System.in);
? ? int a=scanner.nextInt();
? ? if(a==1){
System.out.println("你可租車的類型及其價目表:");?
System.out.println("序號 ? ? ? ? " + "汽車名稱 ? ? ? ? ? ? ? ? ? " + "租金 ? ? ? ? ? ? ? ? ? ? ?" + "容量 ");?
Car car1=new Car("1. ? 奧迪A4", 500, 4);
Car car2=new Car("2. ? 馬自達6", 400, 4);
Car car3=new Car("3. ? 皮卡", 450, 4,2);
Car car4=new Car("4. ? 金龍32", 800, 20);
Car car5=new Car("5. ? 松花江", 400, 4.0);
Car car6=new Car("6. ? 依擒科", 1000, 20.0);
System.out.println("請輸入你要租的汽車數量");
Scanner sc =new Scanner(System.in);
? int b=sc.nextInt();
??
? int price=0;
? int sum=0;
? int weight=0;
? String logo=" ";
? String logo1=" ";
?for(int i=1; i<=b; i++){
System.out.println("請輸入第" + i + "輛車的序號");?
Scanner scnn =new Scanner(System.in);
? int c=scnn.nextInt();
? switch (c){
? case 1:
? logo="奧迪A4";
? ? ? price=500;
? ? ? sum=4;
? ? ? break;
?case 2:
? logo="馬自達6";
? ? ? price=400;
? ? ? sum=4;
? ? ?break;
case 3:
? logo="皮卡";
? ? ? price=450;
? ? ? sum=4;?
? ? ? weight=2;
? ? ? logo1="皮卡";
? ? ? break;
case 4:
? logo="金龍32";
? ? ? price=800;
? ? ? sum=20;?
? ? ? break;
case 5:
? logo1="松花江";
? ? ? price=400;
? ? ? weight=4;
? ? ? break;
case 6:
? logo1="依擒科";
? ? ? price=1000;
? ? ? weight=20;?
? ? ? break;
? ? ??
? ? ??
? }
? logo += logo;?
? sum += sum ;
? weight +=weight;
? price +=price;
? logo1 += logo1; ?
? ? ? ? ? ?
? ??
?}
?
System.out.println("請輸入租車天數");
Scanner day =new Scanner(System.in);
? int days=day.nextInt();
?
System.out.println("你的賬單：");
System.out.println("*****可載人的車有："); ?
System.out.println(logo + " ? 共載人：" + sum);
System.out.println("*****可載貨的車有：" );
System.out.println(logo1 + " ? 共載貨：" + weight);?
System.out.println("租車總價格： ? " + price*days + "元");?
??
? ?}else{
? System.out.println("你已退出！");
? ?}
? ? ? ??
}
}
運行結果是亂的，不知道哪里出了問題
望高手指點
2014-11-09
? logo += logo;?
? sum += sum ;
? weight +=weight;
? price +=price;
? logo1 += logo1; ?
這里出了問題，看上去像是沒有問題，但是測試過后，你會發現結果會比正確值多一半。。比如sum+=sum，假設case:1時，結果會是sum=4+4，但是我們是需要它的結果是sum=0+4；所以需要改成sum1+=sum，重新定義一個int sum1=0，就可以了，同理另外四個也需要改哈。。