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kandi X-RAY | Simple-Calculator Summary
kandi X-RAY | Simple-Calculator Summary
Simple-Calculator
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QUESTION
I'm using a tutorial online but it seems that it might be a bit outdated? Here it is if you guys want it: https://www.instructables.com/id/How-to-Make-a-Simple-Calculator-in-Java/
...ANSWER
Answered 2020-Jan-30 at 00:09import java.util.Scanner;
public class MathOperations {
public static void main(String[] args){
int firstNumber = 0;
int secondNumber = 0;
char operator;
double answer = 0.0;
Scanner scanObject = new Scanner(System.in);
System.out.println("Please enter your first number: ");
firstNumber = scanObject.nextInt();
System.out.println("Please enter your second number");
secondNumber = scanObject.nextInt();
System.out.println("Addition, substraction, multiplcation, or dividing? ");
operator = scanObject.next().charAt(0);
switch (operator){
case 'A': answer = firstNumber + secondNumber;
}
}
}
QUESTION
I have a components directory in src which has a directory called calculator and then it has 3 different components, instead of importing all 3 I was thinking if I can just import the directory calculator.
one of component has following code
...ANSWER
Answered 2019-Mar-13 at 13:06import Calculator from "./components/calculator"
by default this will import the ./components/calculator/index.js
file, and I', guessing you don't have any index.js in that calculator
directory, That's why you are getting that error
QUESTION
I tried to create a calculator using multiple boolean types on one "if" command. I also tried to use the numbers 42(*),43(+),45(-) and 47(/) from the ASCII table instead of the symbols. Now, for some resson it's not working both with the numbers and the symbols and I would like to know why. I know how to solve the problem using different methods but i want to understand the logic of why my programm isn't working, thanks for anyone who can help!
One of the different methods: [Trouble with a simple calculator code (Java)
...ANSWER
Answered 2017-Dec-24 at 20:39The original problem is with the line System.out.println(num5+action+num6+"=");
where you attempt to form a String from 2 doubles and a character. This will perform numeric calculation before casting to a String. To concatenate to form a String, you can simply use System.out.println(num5 + "" + action + "" + num6 + "" + "=");
You also asked if there is a better way to solve the equation without a tone of if-statements - Not very elegantly unfortunately. You can use a switch statement to make it somewhat more legible, such as below. There is a JavaScript ScriptEngine library for Java you may be interested in, but if you know what the inputs will be the Switch statement is as good as you will get.
QUESTION
I'm trying to create a Calculator with a Class. However using references from the internet particularly from this website (https://www.sourcecodester.com/tutorials/c/7548/simple-calculator-using-class-c.html)
It did not mention to declare "Information" or whatsoever.
When I typed in the code, the error list return with Information does not exist in current context.
Is there a way to modify the code below? Thank you so much.
...ANSWER
Answered 2017-May-20 at 07:39I had a quick look at the link and they don't appear to have declared Information anywhere nor have they indicated that they've overridden anything so...I don't know.
That line, however, is just validating that the information entered into the two text boxes are actually numbers and not anything else that can't be calculated.
There are lots of methods you could use to check those numbers. Options would include, but are not limited to:
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