Well, I'm new to Java and it's a bank holiday and I was bored so I made a simple calculator.
I guess I'll add more functions as I get better.Code:/**
* Personal project
*/
package Mar;
import java.io.*;
import static java.lang.Math.*;
/**
* @author Re
*
*/
public class Calculator {
/**
* @param args
*/
public static void main(String[] args) throws IOException {
BufferedReader dataIn = new BufferedReader( new InputStreamReader( System.in));
//Storage
int num1 = 0, num2 = 0, result = 0, choice = 0;
double dResult = 0.0;
// Main Input
System.out.println("Welcome to Military's calculator");
System.out.println("Enter 1 for addition, 2 for subtraction");
System.out.println("Enter 3 for multiplication, 4 for division");
System.out.println("Enter 5 for square root");
System.out.println("Enter 0 to exit");
System.out.println("Enter your choice: ");
choice = Integer.parseInt(dataIn.readLine());
while(choice != 0){ // Looping calculations
switch(choice){
case 1: // Using the addition choice
System.out.println("Enter 1st number");
num1 = Integer.parseInt(dataIn.readLine());
System.out.println("Enter 2nd number");
num2 = Integer.parseInt(dataIn.readLine());
result = addNumber(num1, num2);
System.out.println("The result is "+result+".");
break;
case 2: // Using the subtraction choice
System.out.println("Enter 1st number");
num1 = Integer.parseInt(dataIn.readLine());
System.out.println("Enter 2nd number");
num2 = Integer.parseInt(dataIn.readLine());
result = subNumber(num1, num2);
System.out.println("The result is "+result+".");
break;
case 3: // Using the multiplication choice
System.out.println("Enter 1st number");
num1 = Integer.parseInt(dataIn.readLine());
System.out.println("Enter 2nd number");
num2 = Integer.parseInt(dataIn.readLine());
result = multiNumber(num1, num2);
System.out.println("The result is "+result+".");
break;
case 4: // Using the division choice
System.out.println("Enter 1st number");
num1 = Integer.parseInt(dataIn.readLine());
System.out.println("Enter 2nd number");
num2 = Integer.parseInt(dataIn.readLine());
dResult = divNumber(num1, num2);
System.out.println("The result is "+dResult+".");
break;
case 5: // Using the square root choice
System.out.println("Enter number");
num1 = Integer.parseInt(dataIn.readLine());
dResult = squareNumber(num1);
System.out.println("The result is "+dResult+".");
break;
}
//Loop Input
System.out.println("Enter your choice: ");
choice = Integer.parseInt(dataIn.readLine());
}
System.out.println("Program was closed!"); // When 0 is pressed
}
static int addNumber(int num1, int num2){ // Dedicated addition function
int result = 0;
result = num1 + num2;
return result;
}
static int subNumber(int num1,int num2){ // Dedicated subtraction function
int result = 0;
result = num1 - num2;
return result;
}
static int multiNumber(int num1, int num2){ // Dedicated multiplication function
int result = 0;
result = num1 * num2;
return result;
}
static double divNumber(int num1, int num2){ // Dedicated division function
double result = 0.0;
result = (num1 / num2);
return result;
}
static double squareNumber(int num1){ // Dedicated square function
double result = 0.0;
result = sqrt(num1);
return result;
}
}
