+- Hack Forums (https://hackforums.net)
+-- Forum: Tech (https://hackforums.net/forumdisplay.php?fid=444)
+--- Forum: Coding (https://hackforums.net/forumdisplay.php?fid=151)
+---- Forum: Software Development (https://hackforums.net/forumdisplay.php?fid=118)
+---- Thread: [Java] Java calculator source code (/showthread.php?tid=4998460)
Java calculator source code - xlosmuertosx - Sep 23, 2015
Heres a calculator
math.java
Code
package Calc;
/**
*
* @author xlosmuertosx
*/
public class Maths {
double add(double a, double b) {
double answer = a+b;
return answer;
}
double subtract(double a, double b) {
double answer = a-b;
return answer;
}
double multiply(double a, double b) {
double answer = a*b;
return answer;
}
double divide(double a, double b) {
double answer = a/b;
return answer;
}
double power(double a, double b){
double answer =a;
for (int x=2; x<=b; x++){
answer *= a;
}
return answer;
}
}Calculator.java
Code
package calc;
/**
*
* @author xlosmuertosx
*/
import java.util.Scanner;
public class Calculator {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
Maths Maths = new Maths();
double answer = 0;
double inputA, inputB;
char operator;
boolean done = false;
while (done == false) {
System.out.print("Please enter what you want to calculate: ");
inputA = input.nextDouble();
operator = input.next().charAt(0);
inputB = input.nextDouble();
switch (operator) {
case '+': answer = Maths.add(inputA, inputB);
break;
case '-': answer = Maths.subtract(inputA, inputB);
break;
case '*': answer = Maths.multiply(inputA, inputB);
break;
case '/': answer = Maths.divide(inputA, inputB);
break;
case '^': answer = Maths.power(inputA, inputB);
break;
}
System.out.println(answer);
}
input.close();
}
}* - clrlslwi - Sep 23, 2015
Why do you have an instanced class full of pure functions? And a better question is why you have methods wrapping simple arithmic operations.
... insert rant about closing System.in and predefining your variables without assigning anything to them ...
* - xlosmuertosx - Sep 24, 2015
(Sep 23, 2015 09:59 PM)Demmonic Wrote: Why do you have an instanced class full of pure functions? And a better question is why you have methods wrapping simple arithmic operations.
... insert rant about closing System.in and predefining your variables without assigning anything to them ...
I cant understand, could you please write the source code ?
* - csrk - Sep 25, 2015
(Sep 24, 2015 07:44 PM)xlosmuertosx Wrote: I cant understand, could you please write the source code ?
You made something way more complex than it could be. I.e you made a function for adding two numbers, while a+b would have been just fine.
* - gua - Sep 25, 2015
Will u in future add more functions to this ? :)
* - xlosmuertosx - Sep 25, 2015
(Sep 25, 2015 06:48 AM)Rewbert Wrote: You made something way more complex than it could be. I.e you made a function for adding two numbers, while a+b would have been just fine.
Oh okay thanks, now I get it.
* - the wolf of blockchain - Sep 25, 2015
Went the extra mile but practice doesn't hurt :)
* - xlosmuertosx - Sep 25, 2015
(Sep 25, 2015 08:59 AM)gua Wrote: Will u in future add more functions to this ? :)
What more function do you want ? you mean like a scientific calculator or a graphical display calculator ?