Java简易计算器.doc

package lesson5_calculator;/*写一个有复杂功能的计算器类，除了能做两个数的加、减、乘、除外，还有如下功能1）输入一个正整数，能判断其是不是完数（所有因子之和等于该数本身，则该数为完数）2）输入一个正整数，能找出其之前全部的素数（一个数如果除了1和自身外，不能被其他数整除 则其为素数） 然后在主类中生成对象，调用这两个方法，判断28、36是不是完数，100之前所有的素数 */public class Calculator public static void main(Stringargs)Wanshu w=new Wanshu();w.wanshu(28);w.wanshu(36);Prime p=new Prime();p.prime(100);GUI g=new GUI();g.menu();Start_calculator s=new Start_calculator();s.start();/package lesson5_calculator;public class BasicOption /基本加减乘除void sum(int a,int b)System.out.println(a+b+=+(a+b);void sub(int a,int b)System.out.println(a+-+b+=+(a-b);void mult(int a,int b)System.out.println(a+*+b+=+(a*b);void div(double a,double b)System.out.println(a+/+b+=+(a/b);/package lesson5_calculator;public class GUI void menu()System.out.println(*欢迎使用SHXT计算器*);System.out.println(* 1-加法 *);System.out.println(* 2-减法 *);System.out.println(* 3-乘法 *);System.out.println(* 4-除法 *);System.out.println(* 5-完数判断 *);System.out.println(* 6-计算素数 *);System.out.println(*请输入您要做的操作*);/判别素数package lesson5_calculator;public class Prime void prime(int a) boolean f;for(int i=2;ia;i+)f=true;for(int j=2;j=Math.sqrt(i);j+)if(i%j=0)f=false;break;elsef=true;if(f)System.out.print(i+ );System.out.println();/package lesson5_calculator;import java.util.Scanner;public class Start_calculator BasicOption bo=new BasicOption();Prime p=new Prime();Wanshu w=new Wanshu();void start()Scanner r=new Scanner(System.in);while(r.hasNext()int n=r.nextInt();switch(n)case 1:System.out.println(请输入两个整型运算数：);int a=r.nextInt();int b=r.nextInt();bo.sum(a, b); break;case 2: System.out.println(请输入两整型运算数：); int a=r.nextInt(); int b=r.nextInt(); bo.sub(a, b); break; case 3: System.out.println(请输入两整型运算数：); int a=r.nextInt(); int b=r.nextInt(); bo.mult(a, b); break; case 4: System.out.println(请输入两整型运算数：); double a=r.nextDouble();double b=r.nextDouble(); bo.div(a, b); break; case 5: System.out.println(请输入一个数：); int a=r.nextInt(); w.wanshu(a); break; case 6: System.out.println(请输入一个数：); int a=r.nextInt(); p.prime(a); break; /package lesson5_calculator;public class Wanshu void wanshu(int a) int sum=0;