Station B Mad God Calculator Homework
calculator i wrote
package com.chen.method;
import java.util.Scanner;
//简易计算器
public class Demo7 {
public static void main(String[] args) {
//输入操作数1
Scanner scanner1 = new Scanner(System.in);
System.out.println("请输入操作数1：");
float number1 = scanner1.nextFloat();
//输入操作数2
Scanner scanner2 = new Scanner(System.in);
System.out.println("请输入操作数2：");
float number2 = scanner2.nextFloat();
//输入操作
Scanner scanner = new Scanner(System.in);
System.out.println("请输入操作(+,-,*,/)：");
String symbol = scanner.next();
//调用方法
switch (symbol){
case "+":
float sum = add(number1,number2);
System.out.println(sum);
break;
case "-":
float difference = subtraction(number1,number2);
System.out.println(difference);
break;
case "*":
float product = multiplication(number1,number2);
System.out.println(product);
break;
case "/":
float quotient = division(number1,number2);
System.out.println(quotient);
break;
}
scanner1.close();
scanner2.close();
scanner.close();
}
//加法
public static float add(float a,float b){
float sum = a + b;
return sum;
}
//减法
public static float subtraction(float c,float d){
float difference = c - d;
return difference;
}
//乘法
public static float multiplication(float e,float f){
float product = e * f;
return product;
}
//除法
public static float division(float g,float h){
float quotient = g / h;
return quotient;
}
}
Advanced version of online search
package com.chen.method;
import java.util.Scanner;
//计算器优化
public class Demo8 {
public static void main(String[] args) {
System.out.println("请输入第一个数：");
Scanner scanner = new Scanner(System.in);
float a = scanner.nextFloat();
System.out.println("请输入运算符（+，-，*，/）：");
Scanner scanner1 = new Scanner(System.in);
String b = scanner1.next();
System.out.println("请输入下一个数：");
Scanner scanner2 = new Scanner(System.in);
float c = scanner2.nextFloat();
while (true) {
//点睛之笔！
float count = count(a,b,c);
a = count;
System.out.println("继续输入运算符进行运算，或输入Q退出程序...");
b = scanner2.next();
if (b.equals("Q")||b.equals("q")) {
break;
}
System.out.println("请输入数据...");
c = scanner1.nextFloat();
}
}
public static float count(float a,String b,float c){
switch (b) {
case "+":
System.out.println("当前运算结果为"+add(a, c));
return add(a, c);
case "-":
System.out.println("当前运算结果为"+sub(a, c));
return sub(a, c);
case "*":
System.out.println("当前运算结果为"+mul(a, c));
return mul(a, c);
case "/":
System.out.println("当前运算结果为"+div(a, c));
return div(a, c);
default:
System.out.println("非法输入");
return 0;
}
};
public static float add(float a, float b) {
return a + b;
}
public static float sub(float a, float b) {
return a - b;
}
public static float mul(float a, float b) {
return a * b;
}
public static float div(float a, float b) {
return a / b;
}
}
Thank you for taking it away!