小弟一個下午寫出來的代碼，很多地方寫的不夠簡潔，可也不知道怎么改，請大家?guī)臀铱纯?，請多多指教?/h1>

package?exercise03;

public?class?Car?{
	public?int?manned;
	public?int?cargo;
	public?int?rental;
	public?void?introduce(){
		System.out.println("1.??奧迪A4??500元/天?????載人：4人");
}
}
package?exercise03;

public?class?AodiA4?extends?Car?{
String?name="奧迪A4";
int?rental=500;
int?manned=4;
int?cargo=0;
public?void?introduce(){
	System.out.println("1.??奧迪A4??500元/天?????載人：4人");
}
}
package?exercise03;

public?class?Jinlong?extends?Car?{
String?name="金龍";
int?rental=800;
int?manned=20;
int?cargo=0;
public?void?introduce(){
System.out.println("4.??金龍???????????????800元/天?????載人：20人");
}
}
package?exercise03;

public?class?Mazida6?extends?Car?{
String?name="馬自達6";
int?rental=400;
int?manned=4;
int?cargo=0;
public?void?introduce(){
System.out.println("2.??馬自達6??400元/天?????載人：4人");
}
}
package?exercise03;

public?class?Pikaxue6?extends?Car?{
String?name="皮卡雪6";
int?rental=450;
int?manned=4;
int?cargo=2;
public?void?introduce(){
System.out.println("3.??皮卡雪6??450元/天?????載人：4人??載貨：兩噸");
}
}
package?exercise03;

public?class?Songhuajiang?extends?Car?{
String?name="松花江";
int?rental=400;
int?manned=4;
int?cargo=4;
public?void?introduce(){
System.out.println("5.??松花江??????????400元/天??????載貨：4噸");
}
}
????
package?exercise03;

public?class?Yiweike?extends?Car?{
String?name="依維柯";
int?rental=1000;
int?cargo=20;
int?manned=0;
public?void?introduce(){
System.out.println("6.??依維柯??????????1000元/天???載貨：20噸");
}
}
package?exercise03;
import?java.util.Scanner;

public?class?Test?{

public?static?void?main(String[]?args)?{
//?TODO?Auto-generated?method?stub
Scanner?input=new?Scanner(System.in);
Car?p1=new?AodiA4();
Car?p2=new?Jinlong();
Car?p3=new?Mazida6();
Car?p4=new?Pikaxue6();
Car?p5=new?Songhuajiang();
Car?p6=new?Yiweike();
AodiA4?p12=new?AodiA4();
Jinlong?p22=new?Jinlong();
Mazida6?p32=new?Mazida6();
Pikaxue6?p42=new?Pikaxue6();
Songhuajiang?p52=new?Songhuajiang();
Yiweike?p62=new?Yiweike();
System.out.println("歡迎使用答答租車系統(tǒng):");
System.out.println("您是否要租車:1是?0否");
int?k=input.nextInt();
if(k==0){
System.out.println("歡迎您未來租車時使用本軟件");
}else{
System.out.println("您可租車的類型及其價目表:");
System.out.println("序號?????汽車名稱????租金????????????????????容量");
p1.introduce();
p2.introduce();
p3.introduce();
p4.introduce();
p5.introduce();
p6.introduce();
System.out.println("請輸入您要租用的車輛數");
int?i=input.nextInt();
int[]?nums=new?int[i];
for(int?j=1,h=0;j<=i;h++,j++){
System.out.println("請輸入您要租用的第"+j+"輛車的序號");
nums[h]=input.nextInt();
}
System.out.println("請輸入要租用的天數");
int?d=input.nextInt();
int?allmanned=0;
int?allcargo=0;
int?money=0;
System.out.println("您要租用的車輛分別為:");
for(i=0;i<nums.length;i++){
???????if(nums[i]==1){
p1.introduce();
allmanned=allmanned+p12.manned;
allcargo=allcargo+p12.cargo;
money=money+p12.rental;
}else?if(nums[i]==2){
p2.introduce();
allmanned=allmanned+p22.manned;
allcargo=allcargo+p22.cargo;
money=money+p22.rental;
}else?if(nums[i]==3){
p3.introduce();
allmanned=allmanned+p32.manned;
allcargo=allcargo+p32.cargo;
money=money+p32.rental;
}else?if(nums[i]==4){
p4.introduce();
allmanned=allmanned+p42.manned;
allcargo=allcargo+p42.cargo;
money=money+p42.rental;
}else?if(nums[i]==5){
p5.introduce();
allmanned=allmanned+p52.manned;
allcargo=allcargo+p52.cargo;
money=money+p52.rental;
}else?if(nums[i]==6){
p6.introduce();
allmanned=allmanned+p62.manned;
allcargo=allcargo+p62.cargo;
money=money+p62.rental;
}
}
int?allmoney=money*d;
System.out.println("您租用的天數為"+d+"天");
System.out.println("合計載人量："+allmanned+"人");
System.out.println("合計載貨量"+allcargo+"噸");
System.out.println("租金總計："+allmoney+"元");
}
}

}