22.编写一个类A,该类创建的对象可以调用方法showA输出小写的英文字母表.然后再编写一个A类的子类B,子类B创建的对象不仅可以调用方法showA输出小写的英文字母表,而且可以调用子类新增的方法showB输出大写的英文字母表.最后编写主类C,在主类的main方法 中测试类A与类B. package jicheng; public class A { public void showA() { System.out.println("asdfsdf"); } } package jic
作业:编写一个类Computer,类中含有一个求n的阶乘的方法.将该类打包,并在另一包中的Java文件App.java中引入包,在主类中定义Computer类的对象,调用求n的阶乘的方法(n值由参数决定),并将结果输出. 代码: Computer类: package tym; public class Computer { int sum=1; public int getSum(int x) { for(int i=1;i<x+1;i++) { sum=sum*i; } return sum;
请定义一个函数quadratic(a, b, c),接收3个参数,返回一元二次方程:ax² + bx + c = 0的两个解. #!/usr/bin/env python # -*- coding: utf-8 -*- import math def quadratic(a,b,c): if a == 0: raise TypeError('a不能为0') if not isinstance(a,(int,float)) or not isinstance(b,(int,float)) or n
package java1; //计算器 public class Jisuanqi { //属性 //型号,品牌等 //重载 //1.方法同名不同参 //2.返回类型和重载无关 //3.多态的一种表现形式 //4.构造方法也可重载: //方法 //加法运算 public int Jia(int a,int b) { return a+b; } public int Jia(int x,int y,int z) { return x+y+z; } //浮点数加法 public double Ji
package zimu; public class A { public void f() { for (int i = 97; i <123; i++) { System.out.print((char)i); } System.out.println(); } } package zimu; public class B extends A { public void g() { for (int i = 65; i <91; i++) { System.out.print((char)
@ 目录 1.thread类 1.thread类 threding代码实现 import threading import time class MyThread(threading.Thread): def run(self): for i in range(3): time.sleep(1) msg ="i am "+ self.name + "@" +str(i) print(msg) if __name__ == '__main__': t = MyThre
package a; public interface InterfaceA { int method(int n); } package a; public class ClassA implements InterfaceA { public int method(int n) { int sum=0; for (int i = 1; i <=n; i++) { sum+=i; } System.out.println("1+2+3+......+"+n+"=&qu
package a; public class Father { public String name; private int age; public Father(String name) { this.name=name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public Father(int age) { super(); this.age = age;
package com.homework2; public class ClassA implements InterfaceA { @Override public int method(int n) { int sum = 0; for(int i = 0; i<=n;i++) { sum+=i; } return sum; } } package com.homework2; public class ClassB implements InterfaceA { @Override pub