新手自学Java,自己写了一个小程序，POS单记账器，但是出了点儿小问题，求解

package testPackage

import java.util.*

public class ikjkk {

public static void main(String[] args) {

Scanner saomiaoyi = new Scanner(System.in)

int he = 0

for () {

System.out.println("请输入一共有多少笔交易：")

int shu = saomiaoyi.nextInt()

//Double[]shuzu={shu}     //这样是错的

Double[] shuzu = new Double[shu]  //要用new来动态定义数组

for (int i = 0 i < shu i++) {

System.out.println("开始输入第" + (i + 1) + "个数字")

shuzu[i] = saomiaoyi.nextDouble()

he += shuzu[i]

}

System.out.println("你一共录入了" + shu + "笔交易！")

System.out.print("所有交易的和为：" + he)

}

}

}

public class Taxi {

public static void main(String args[]){

car a=new car(8,10,3)

car b=new car(10,15,2)

for(int i=0i<100i++){

System.out.println(i+"公里的钱数分别为：")

System.out.println("甲车："+a.money(i))

System.out.println("乙车："+b.money(i))

}

}

}

class car{

private int gongli

private int money_bz

private int money_cc

car(){

}

car(int gongli,int money_bz,int money_cc){

this.gongli=gongli

this.money_bz=money_bz

this.money_cc=money_cc

}

public int money(int instance){

int i=0

if(instance<=gongli&&instance>0){

i=instance*money_bz/gongli

}else if(instance>gongli){

i=gongli*money_bz+(instance-gongli)*money_cc

}else{

System.out.println("the number is error!")

}

return i

}

}

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