我正在尝试用Java创建一个基本的计算器.我对编程很陌生,所以我试着习惯它.
import java.util.Scanner;
import javax.swing.JOptionPane;
public class javaCalculator
{
public static void main(String[] args)
{
int num1;
int num2;
String operation;
Scanner input = new Scanner(System.in);
System.out.println("please enter the first number");
num1 = input.nextInt();
System.out.println("please enter the second number");
num2 = input.nextInt();
Scanner op = new Scanner(System.in);
System.out.println("Please enter operation");
operation = op.next();
if (operation == "+");
{
System.out.println("your answer is" + (num1 + num2));
}
if (operation == "-");
{
System.out.println("your answer is" + (num1 - num2));
}
if (operation == "/");
{
System.out.println("your answer is" + (num1 / num2));
}
if (operation == "*")
{
System.out.println("your answer is" + (num1 * num2));
}
}
}
最佳答案
Here is simple code for calculator so you can consider this
import java.util.*;
import java.util.Scanner;
public class Hello {
public static void main(String[] args)
{
System.out.println("Enter first and second number:");
Scanner inp= new Scanner(System.in);
int num1,num2;
num1 = inp.nextInt();
num2 = inp.nextInt();
int ans;
System.out.println("Enter your selection: 1 for Addition,2 for substraction 3 for Multiplication and 4 for division:");
int choose;
choose = inp.nextInt();
switch (choose){
case 1:
System.out.println(add( num1,num2));
break;
case 2:
System.out.println(sub( num1,num2));
break;
case 3:
System.out.println(mult( num1,num2));
break;
case 4:
System.out.println(div( num1,num2));
break;
default:
System.out.println("Illigal Operation");
}
}
public static int add(int x,int y)
{
int result = x + y;
return result;
}
public static int sub(int x,int y)
{
int result = x-y;
return result;
}
public static int mult(int x,int y)
{
int result = x*y;
return result;
}
public static int div(int x,int y)
{
int result = x/y;
return result;
}
}
