SC---------Java面向对象编程

xiaoxiao2021-02-28  23

1.长方体 class Box{ int length,width,high; void setBox(int l,int w,int h){ length=l; width=w; high=h; } int volume(){ int v; v=length*width*high; return v; } } public class cft { public static void main(String args[]){ int vi; Box as; as=new Box(); as.setBox(1,2,3); vi=as.volume(); System.out.println("体积为:"+vi); } } 2.银行账户 class BankAccount{ double leftmoney; int account_number; public void savemoney(double money) {   //存款 leftmoney+=money; } public void getmoney (double money){  //取款 leftmoney-=money; } public double getleftmoney () {     //查询余额 return leftmoney; } public BankAccount (int number, double money){  //构造方法,用来初始化变量 account_number=number; leftmoney=money; } } public class java3_2 { public static void main(String[] args) { BankAccount ba; ba=new BankAccount(123456,500); ba.savemoney(1000);  System.out.println("存入1000元后,您的余额为:"+ba.getleftmoney()); ba.getmoney(2000); System.out.println("取款2000元后,您的余额为:"+ba.getleftmoney()); } }
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