public class Account {
//带参存款
public double shape(double a ){
return a;
}
//带参取款
public double qukuan(double b){
return b;
}
}
package com.ban;
import java.util.Scanner;
public class test {
public static void main(String[] args) {
// TODO Auto-generated method stub
double a1 = 0;
double b1;
int count;
Scanner input = new Scanner(System.in);
Account a = new Account();
do {
System.out.println("1.存款 2.取款 0.退出");
System.out.println("请选择你需要办理的业务：");
count = input.nextInt();
switch (count) {
case 0:
System.out.println("谢谢使用");
break;
case 1:
System.out.println("请输入存款金额：");
a1 = input.nextDouble();
System.out.println("存款成功");
System.out.println("*****当前余额为："+a.shape(a1)+"元*****");
a.shape(a.shape(a1));
break;
case 2:
System.out.println("请输入取款金额：");
b1 = input.nextDouble();
if (a.shape(a1)>=a.qukuan(b1)) {
System.out.println("取款成功");
System.out.println("*****当前余额为："+(a.shape(a1)-a.qukuan(b1))+"元*****");
a.shape(a.shape(a1)-a.qukuan(b1));
}else{
System.out.println("错误!");
}
break;
default:
System.out.println("您的输入有误，请重新输入:");
count=input.nextInt();
break;
}
} while (count!=0);
}
}
第一次存的钱进去没有问题 ，，循环一次就把存的钱回零了。
我想让存取叠加。
------解决方案--------------------------------------------------------
在你的基础上稍微修正了一下。。。
- Java code
import java.util.Scanner;public class Testt { public static void main(String[] args) { double a1 = 0; double b1; int count; Scanner input = new Scanner(System.in); Account a = new Account(); do { System.out.println("1.存款 2.取款 0.退出"); System.out.println("请选择你需要办理的业务："); count = input.nextInt(); switch (count) { case 0: System.out.println("谢谢使用"); break; case 1: System.out.println("请输入存款金额："); a1 = input.nextDouble(); System.out.println("存款成功"); a.setSum(a.shape(a1)); System.out.println("*****当前余额为：" + a.getSum() + "元*****"); break; case 2: System.out.println("请输入取款金额："); b1 = input.nextDouble(); if (a.getSum() >= a.qukuan(b1)) { System.out.println("取款成功"); a.setSum(a.qukuan(b1)); System.out.println("*****当前余额为：" + a.getSum() + "元*****"); } else { System.out.println("错误!"); } break; default: System.out.println("您的输入有误，请重新输入:"); count = input.nextInt(); break; } } while (count != 0); }}class Account { double sum = 0; // 带参存款 public double shape(double a) { return sum + a; } // 带参取款 public double qukuan(double b) { return sum - b; } public double getSum() { return sum; } public void setSum(double sum) { this.sum = sum; }}