Project

import java.lang.Math;
import java.util.Scanner;

public class MyCalculator {
    int a, b;
    Scanner sc = new Scanner(System.in);
    
    int addition(){
        System.out.println("Enter the two number for addition: ");
        a=sc.nextInt();
        b=sc.nextInt();
        return(a+b);
    }
    int subtraction(){
        System.out.println("Enter the two number for subtraction: ");
        a=sc.nextInt();
        b=sc.nextInt();
        return(a-b);
    }
    int division(){
        System.out.println("Enter the two number for division: ");
        a=sc.nextInt();
        b=sc.nextInt();
        return(a/b);
    }
    int multiplication(){
        System.out.println("Enter the two number for division: ");
        a=sc.nextInt();
        b=sc.nextInt();
        return(a*b);
    }
    void normal(){
        System.out.println("1: Addition");
        System.out.println("2: Subtraction");
        System.out.println("3: Division");
        System.out.println("4: Multiplication");
        System.out.println("Enter the action: ");
        int choice = sc.nextInt();
        int Answer = 0;
        switch(choice){
            case 1:
                Answer = addition();
                break;
            case 2:
                Answer = subtraction();
                break;
            case 3:
                Answer = division();
                break;
            case 4:
                Answer = multiplication();
                break;
            default:
                System.out.println("Invalid action!!");
        }
        System.out.println("The answer is:"+ Answer);
   }
   int power(){
       System.out.println("Enter 2 number for power: ");
       a= sc.nextInt();
       b= sc.nextInt();
       return ((int)Math.pow(a,b));
   }
    int squareRoot(){
        System.out.println("Enter the number for Square Root: ");
        a= sc.nextInt();
        return((int)Math.sqrt(a));
    }
    int log(){
        System.out.println("Enter the number for Logarithmic value: ");
        a= sc.nextInt();
        return((int)Math.log10(a));
    }
    int naturalLog(){
        System.out.println("Enter the number for Natural Log: ");
        a= sc.nextInt();
        return((int)Math.log(a));
    }
    int sin(){
        System.out.println("Enter the degree for Sine value: ");
        a= sc.nextInt();
        b= (int) Math.toDegrees(a);
        return((int)Math.sin(b));
    }
    int decToBin(){
        int dec_num, quot, i=1, j;
        int bin_num[] = new int[100];
        System.out.print("Input a Decimal Number : ");
        dec_num = sc.nextInt();

        quot = dec_num;

        while(quot != 0)
        {
            bin_num[i++] = quot%2;
            quot = quot/2;
        }

        System.out.print("Binary number is: ");
        for(j=i-1; j>0; j--)
        {
            System.out.print(bin_num[j]);
        }
        System.out.print("\n");

        return 0;
    }
    int binToDec()
    {
        System.out.println("Enter a binary number:");
        int n = sc.nextInt();

        int decimal = 0, p = 0;

        while (n != 0) {
            decimal += ((n % 10) * Math.pow(2, p));
            n = n / 10;
            p++;
        }

        System.out.println("The decimal for the given binary is:" +decimal);
        return 0;
    }
    int sip(){
        System.out.print("Enter the principal: ");
        double principal = sc.nextDouble();

        System.out.print("Enter the rate: ");
        double rate = sc.nextDouble();

        System.out.print("Enter the time: ");
        double time = sc.nextDouble();

        double interest = (principal * time * rate) / 100;

        System.out.println("Principal: " + principal);
        System.out.println("Interest Rate: " + rate);
        System.out.println("Time Duration: " + time);
        System.out.println("Simple Interest: " + interest);

        sc.close();
        return 0;
    }
    void scientific(){
        System.out.println("1:Power");
        System.out.println("2:Square Root");
        System.out.println("3:Logarithmic value");
        System.out.println("4:Natural log");
        System.out.println("5:Sine");
        System.out.println("6:Decimal to Binary");
        System.out.println("7:Binary to Decimal");
        System.out.println("8:SIP");
        System.out.println("Enter the action: ");
        int choice = sc.nextInt();
        int Answer = 0;
        switch (choice){
            case 1:
                Answer = power();
                break;
            case 2:
                Answer = squareRoot();
                break;
            case 3:
                Answer = log();
                break;
            case 4:
                Answer = naturalLog();
                break;
            case 5:
                Answer = sin();
                break;
            case 6:
                 decToBin();
                break;
            case 7:
                binToDec();
                break;
            case 8:
                sip();
                break;
            default:
                System.out.println("Invalid input!!");
        }
        System.out.println("The answer is :" + Answer);
    }
    public static void main(String[] args) {
        Scanner sc =  new Scanner(System.in);
        MyCalculator obj = new MyCalculator();
        System.out.println("1:Normal Calculator");
        System.out.println("2:Scientific Calculator");
        System.out.println("Choose the calculator you want to use: ");
        int choice = sc.nextInt();
        switch (choice){
            case 1:
                obj.normal();
                break;
            case 2:
                obj.scientific();
                break;
            default:
                System.out.println("Invalid action!!");
        }
    }
}