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JAvA中怎么能实现从键盘输入几个数字后进行四则运算

package test;import java.util.Scanner;import javax.script.ScriptEngine;import javax.script.ScriptEngineManager;import javax.script.ScriptException;public class A1{public static void main ( String[] args ){ScriptEngineManager se...

使用Scanner类 Scanner scan=new Scanner(System.in); //新建Scanner对象 int a=scan.nextInt() // 调用nextInt方法,获取用户输入的数字

import java.math.BigDecimal; import java.util.Scanner; public class Calculator { public static void main(String[] args) { Calculator c = new Calculator(); while(true){ Scanner s = new Scanner(System.in); System.out.print("请输...

import java.text.DecimalFormat; import java.util.Scanner; public class Zhidao { public static void main(String[] args) { String condition = ""; Zhidao zhidao = new Zhidao(); do{ Scanner scanner = new Scanner(System.in); try{ Sy...

import java.util.Scanner;class Test{public static void main(String[] argv){Scanner s = new Scanner(System.in);Integer a = s.nextInt();Integer b = s.nextInt();System.out.println(a+b);}}

首先要知道四则混合运算是什么。其实就是加减乘除运算。 java实现这个很简单。 首先定义变量a,b用来运算。 double a=1; b=2;//定义变量 system.out.println(a+b); //加分运算 system.out.println(a-b);//减法运算 system.out.println(a/b);//除...

import java.util.Scanner; public class 四则运算 { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.print("请输入第一个数字:"); int a = sc.nextInt(); System.out.print("请输入字符:"); Str...

import java.text.DecimalFormat; import java.util.Scanner; public class Zhidao { public static void main(String[] args) { String condition = ""; Zhidao zhidao = new Zhidao(); do{ Scanner scanner = new Scanner(System.in); try{ Sy...

Scanner scanner = new Scanner(System.in); DecimalFormat df = new DecimalFormat("#.00"); String type; int score=0; System.out.println("计算保留两位小数!"); for(int i=0;i

class Class1 { public static void main(String[] args) { System.out.println("Hello World!"); //中缀 => 后缀表达式 String s = "( 1.9 + (20 + 41) / (25 * 11) - 3 ) * 2"; //中缀 String S = ""; //后缀 char[] Operators = new char[s.l...

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