OOP Project by safkat sir

// Arithmatic Calculation Class

import java.util.Scanner;
public class ArithmeticCalculation {

    ArithmeticCalculation(long n)
    {
        Scanner sc=new Scanner(System.in);
        if(n==1) // summation
        {
            long sum=0;
            boolean ok=true;
            while(ok)
            {
                long x=sc.nextLong();
                sum+=x;
                String c=sc.next();
                if(c.charAt(0) == '=')
                {
                    System.out.println(sum);
                    break;
                }
            }
        }
        if(n==2) // substrction
        {
            long a=0,b=0;
            boolean ok=true;
            int i=0;
            while(ok)
            {
                if(i==0)
                {
                    long z=sc.nextLong();
                    a+=z;
                    i++;
                    continue;
                }

                String c=sc.next();
                if(c.charAt(0) == '=')
                {
                    System.out.println(a-b);
                    break;
                }

                long x=sc.nextLong();
                if(c.charAt(0) == '+')
                    a+=x;
                else
                    b+=x;
            }
        }
        if(n==3) // Multiplication
        {
            long a=1;
            boolean ok=true;
            while(ok)
            {
                long x=sc.nextLong();
                a*=x;
                String c=sc.next();
                if(c.charAt(0) == '=')
                {
                    System.out.println(a);
                    break;
                }
            }
        }

        if(n==4) // Division
        {
            double a=sc.nextDouble();
            double b=sc.nextDouble();

            if(b==0)
                System.out.println("Cannot divided by zero");
            else {
                double q=a/b;
                System.out.println(a/b);
            }
        }

        if(n==5) // Mod
        {
            long a=sc.nextLong();
            long b=sc.nextLong();
            if(b==0)
                System.out.println("Cannot divided by zero");
            else
                System.out.println(a%b);
        }
    }
}


// NumberTransformation Class

import java.util.Scanner;
import java.lang.Math;
public class NumberTransformation {

    NumberTransformation(long n)
    {
        Scanner sc=new Scanner(System.in);

        /*       Decimal to      */
        if(n==13) // Dec to Bin
        {
            long x = sc.nextInt();
            long[] arr = new long[64];
            for(int i=63; i>=0; i--)
            {
                arr[i]=x%2;
                x/=2;
            }

            int k=0;
            for(int i=0; i<64; i++)
            {
                if(arr[i]==1)
                    k=1;
                if(k==1)
                System.out.print(arr[i]);
            }
            System.out.println();
        }

        if(n==14) // Dec to Oct
        {
            long x = sc.nextInt();
            long[] arr = new long[64];
            for(int i=63; i>=0; i--)
            {
                arr[i]=x%8;
                x/=8;
            }

            int k=0;
            for(int i=0; i<64; i++)
            {
                if(arr[i]!=0)
                    k=1;
                if(k==1)
                System.out.print(arr[i]);
            }
            System.out.println();
        }

        if(n==15) // Dec to Hexa
        {
            long x = sc.nextInt();
            long[] arr = new long[64];
            for(int i=63; i>=0; i--)
            {
                arr[i]=x%16;
                x/=16;
            }

            int k=0;
            for(int i=0; i<64; i++)
            {
                if(arr[i]!=0)
                    k=1;
                if(k==1)
                {
                    if(arr[i]==10)
                        System.out.print("A");
                    else if(arr[i]==11)
                        System.out.print("B");
                    else if(arr[i]==12)
                        System.out.print("C");
                    else if(arr[i]==13)
                        System.out.print("D");
                    else if(arr[i]==14)
                        System.out.print("E");
                    else if(arr[i]==15)
                        System.out.print("F");
                    else
                        System.out.print(arr[i]);
                }
            }
            System.out.println();
        }

        /*        Binary to      */
        if(n==16) // Bin to dec
        {
            String s=sc.nextLine();
            long dec=0;
            long j=0;
            for(int i=s.length()-1; i>=0; i--)
            {
                if(s.charAt(i)=='1')
                    dec+=(1<<j);
                j++;
            }
            System.out.println(dec);
        }

        if(n==17) // Bin to Oct
        {
            String s=sc.nextLine();
            long dec=0;
            long j=0;
            for(int i=s.length()-1; i>=0; i--)
            {
                if(s.charAt(i)=='1')
                    dec+=(1<<j);
                j++;
            }

            long[] arr = new long[64];
            for(int i=63; i>=0; i--)
            {
                arr[i]=dec%8;
                dec/=8;
            }

            int k=0;
            for(int i=0; i<64; i++)
            {
                if(arr[i]!=0)
                    k=1;
                if(k==1)
                System.out.print(arr[i]);
            }
            System.out.println();
        }

        if(n==18) // Bin to Hexa
        {
            String s=sc.nextLine();
            long dec=0;
            long j=0;
            for(int i=s.length()-1; i>=0; i--)
            {
                if(s.charAt(i)=='1')
                    dec+=(1<<j);
                j++;
            }

            long[] arr = new long[64];
            for(int i=63; i>=0; i--)
            {
                arr[i]=dec%16;
                dec/=16;
            }

            int k=0;
            for(int i=0; i<64; i++)
            {
                if(arr[i]!=0)
                    k=1;
                if(k==1)
                {
                    if(arr[i]==10)
                        System.out.print("A");
                    else if(arr[i]==11)
                        System.out.print("B");
                    else if(arr[i]==12)
                        System.out.print("C");
                    else if(arr[i]==13)
                        System.out.print("D");
                    else if(arr[i]==14)
                        System.out.print("E");
                    else if(arr[i]==15)
                        System.out.print("F");
                    else
                        System.out.print(arr[i]);
                }
            }
            System.out.println();
        }

        /*        Octal to        */
        if(n==19) // Oct to Dec
        {
            long oct = sc.nextLong();
            long i=0,dec=0;
            while(oct!=0)
            {
                dec+=(oct%10)*Math.pow(8, i);
                oct/=10;
                i++;
            }
            System.out.println(dec);
        }
        if(n==20) // oct to bin
        {
            long oct = sc.nextLong();
            long j=0,dec=0;
            while(oct!=0)
            {
                dec+=(oct%10)*Math.pow(8, j);
                oct/=10;
                j++;
            }

            long[] arr = new long[64];
            for(int i=63; i>=0; i--)
            {
                arr[i]=dec%2;
                dec/=2;
            }

            int k=0;
            for(int i=0; i<64; i++)
            {
                if(arr[i]==1)
                    k=1;
                if(k==1)
                System.out.print(arr[i]);
            }
            System.out.println();
        }

        if(n==21) // Oct to Hexa
        {
            long oct = sc.nextLong();
            long j=0,dec=0;
            while(oct!=0)
            {
                dec+=(oct%10)*Math.pow(8, j);
                oct/=10;
                j++;
            }

            long[] arr = new long[64];
            for(int i=63; i>=0; i--)
            {
                arr[i]=dec%16;
                dec/=16;
            }

            int k=0;
            for(int i=0; i<64; i++)
            {
                if(arr[i]!=0)
                    k=1;
                if(k==1)
                {
                    if(arr[i]==10)
                        System.out.print("A");
                    else if(arr[i]==11)
                        System.out.print("B");
                    else if(arr[i]==12)
                        System.out.print("C");
                    else if(arr[i]==13)
                        System.out.print("D");
                    else if(arr[i]==14)
                        System.out.print("E");
                    else if(arr[i]==15)
                        System.out.print("F");
                    else
                        System.out.print(arr[i]);
                }
            }
            System.out.println();
        }

        /*        Hexadecimal to        */
        if(n==22) // Hexa to Dec
        {
            String s=sc.next();
            long dec=0,base=1;
            for(int i=s.length()-1; i>=0; i--)
            {
                char c = s.charAt(i);
                if(c>='0' && c<='9')
                    dec+=(c-'0')*base;
                else
                    dec+=(c-55)*base;
                base*=16;
            }
            System.out.println(dec);
        }
        if(n==23) // Hexa to Bin
        {
            String s=sc.next();
            long dec=0,base=1;
            for(int i=s.length()-1; i>=0; i--)
            {
                char c = s.charAt(i);
                if(c>='0' && c<='9')
                    dec+=(c-'0')*base;
                else
                    dec+=(c-55)*base;
                base*=16;
            }
            long[] arr = new long[64];
            for(int i=63; i>=0; i--)
            {
                arr[i]=dec%2;
                dec/=2;
            }

            int k=0;
            for(int i=0; i<64; i++)
            {
                if(arr[i]==1)
                    k=1;
                if(k==1)
                System.out.print(arr[i]);
            }
            System.out.println();
        }

        if(n==24) // Hexa to Oct
        {
            String s=sc.next();
            long dec=0,base=1;
            for(int i=s.length()-1; i>=0; i--)
            {
                char c = s.charAt(i);
                if(c>='0' && c<='9')
                    dec+=(c-'0')*base;
                else
                    dec+=(c-55)*base;
                base*=16;
            }

            long[] arr = new long[64];
            for(int i=63; i>=0; i--)
            {
                arr[i]=dec%8;
                dec/=8;
            }

            int k=0;
            for(int i=0; i<64; i++)
            {
                if(arr[i]!=0)
                    k=1;
                if(k==1)
                System.out.print(arr[i]);
            }
            System.out.println();
        }
    }

}



// BitwiseOperation Class

import java.util.Scanner;
public class BitwiseOperation {

        BitwiseOperation(long n)
        {
            Scanner sc=new Scanner(System.in);
            System.out.println("Please select which type of input you want: ");
            System.out.println("1. Decimal");
            System.out.println("2. Baniry");
            System.out.println("3. Octal");
            System.out.println("4. Hexadecimal");
            int type =sc.nextInt();

            if(type==1) // Decimal
            {
                long a=sc.nextLong();
                long b=sc.nextLong();
                if(n==25) // OR operation
                    System.out.println(a|b);
                if(n==26) // AND operation
                    System.out.println(a&b);
                if(n==27) // X-OR operation
                    System.out.println(a^b);
            }
            if(type == 2) // Binary
            {
                String s1=sc.nextLine();
                String s2=sc.nextLine();
                long a=0,b=0;
                long j=0;
                for(int i=s1.length()-1; i>=0; i--)
                {
                    if(s1.charAt(i)=='1')
                        a+=(1<<j);
                    j++;
                }

                j=0;
                for(int i=s2.length()-1; i>=0; i--)
                {
                    if(s2.charAt(i)=='1')
                        b+=(1<<j);
                    j++;
                }

                long ans=0;
                if(n==25) // OR operation
                    ans=a|b;
                if(n==26) // AND operation
                    ans=a&b;
                if(n==27) // X-OR operation
                    ans=a^b;

                long[] arr = new long[64];
                for(int i=63; i>=0; i--)
                {
                    arr[i]=ans%2;
                    ans/=2;
                }

                int k=0;
                for(int i=0; i<64; i++)
                {
                    if(arr[i]==1)
                        k=1;
                    if(k==1)
                    System.out.print(arr[i]);
                }
                System.out.println();
            }

            if(type == 3) // Octal
            {
                long oct1 = sc.nextLong();
                long oct2 = sc.nextLong();
                long j=0,a=0,b=0;
                while(oct1!=0)
                {
                    a+=(oct1%10)*Math.pow(8, j);
                    oct1/=10;
                    j++;
                }

                j=0;
                while(oct2!=0)
                {
                    b+=(oct2%10)*Math.pow(8, j);
                    oct2/=10;
                    j++;
                }

                long ans=0;
                if(n==25) // OR operation
                    ans=a|b;
                if(n==26) // AND operation
                    ans=a&b;
                if(n==27) // X-OR operation
                    ans=a^b;

                long[] arr = new long[64];
                for(int i=63; i>=0; i--)
                {
                    arr[i]=ans%8;
                    ans/=8;
                }

                int k=0;
                for(int i=0; i<64; i++)
                {
                    if(arr[i]!=0)
                        k=1;
                    if(k==1)
                    System.out.print(arr[i]);
                }
                System.out.println();
            }

            if(type == 4) // Hexadecimal
            {
                String s1=sc.next();
                String s2=sc.next();
                long a=0,b=0,base=1;
                for(int i=s1.length()-1; i>=0; i--)
                {
                    char c = s1.charAt(i);
                    if(c>='0' && c<='9')
                        a+=(c-'0')*base;
                    else
                        a+=(c-55)*base;
                    base*=16;
                }

                base=1;
                for(int i=s2.length()-1; i>=0; i--)
                {
                    char c = s2.charAt(i);
                    if(c>='0' && c<='9')
                        b+=(c-'0')*base;
                    else
                        b+=(c-55)*base;
                    base*=16;
                }

                long ans=0;
                if(n==25) // OR operation
                    ans=a|b;
                if(n==26) // AND operation
                    ans=a&b;
                if(n==27) // X-OR operation
                    ans=a^b;

                long[] arr = new long[64];
                for(int i=63; i>=0; i--)
                {
                    arr[i]=ans%16;
                    ans/=16;
                }

                int k=0;
                for(int i=0; i<64; i++)
                {
                    if(arr[i]!=0)
                        k=1;
                    if(k==1)
                    {
                        if(arr[i]==10)
                            System.out.print("A");
                        else if(arr[i]==11)
                            System.out.print("B");
                        else if(arr[i]==12)
                            System.out.print("C");
                        else if(arr[i]==13)
                            System.out.print("D");
                        else if(arr[i]==14)
                            System.out.print("E");
                        else if(arr[i]==15)
                            System.out.print("F");
                        else
                            System.out.print(arr[i]);
                    }
                }
                System.out.println();
            }
        }
}


// TrigonometricFuntion Class

import java.lang.Math.*;
import java.util.Scanner;
public class TrigonometricFuntion {

    TrigonometricFuntion(long n)
    {
        Scanner sc=new Scanner(System.in);
        double a = sc.nextDouble();
        double b = (a*Math.PI)/180;
        if(n==28) // sin()
            System.out.println(Math.sin(b));
        if(n==29) // cos();
            System.out.println(Math.cos(b));
        if(n==30) // tan()
        {
            if(a==90)
                System.out.println("Not Defined");
            else
                System.out.println(Math.tan(b));
        }
    }
}

// Others Class

import java.util.Scanner;
import java.lang.Math;
public class Others {

    Others(long n)
    {
        Scanner sc=new Scanner(System.in);
        if(n==6) // factorial
        {
            long x = sc.nextLong();
            long fact=1;
            for(int i=1; i<=x; i++)
                fact*=i;
            System.out.println(fact);
        }
        if(n==7) // Square
        {
            long x = sc.nextLong();
            System.out.println(x*x);
        }

        if(n==8) // Cube
        {
            long x = sc.nextLong();
            System.out.println(x*x*x);
        }

        if(n==9) // X to the power Y
        {
            long x = sc.nextLong();
            long y = sc.nextLong();
            long val=1;
            for(int i=1; i<=y; i++)
                val*=x;
            System.out.println(val);
        }

        if(n==10) // Square Root
        {
            long x = sc.nextLong();
            System.out.println(Math.sqrt(x));
        }

        if(n==11) // Logarithm
        {
            long x = sc.nextLong();
            System.out.println(Math.log10(x));
        }

        if(n==12) // Percentage
        {
            long x = sc.nextLong();
            long y = sc.nextLong();
            long val = (x*y)/100;
            System.out.println(val);
        }
    }

}


// Main Project Class

import java.util.Scanner;
public class Project {

    public static void main(String[] args){

        System.out.println("Assalamualikum\n");
        System.out.println("There are some feature we have,please select whice one you need");
        System.out.println("1. Summation(+)");
        System.out.println("2. Substraction(-)");
        System.out.println("3. Multiplication(x)");
        System.out.println("4. Division(/)");
        System.out.println("5. Mod(%)");
        System.out.println("6. Factorial(x!)");
        System.out.println("7. Square(x2)");
        System.out.println("8. Cube(x3)");
        System.out.println("9. X to the power Y(xY)");
        System.out.println("10. Square root");
        System.out.println("11. Logarithm(log)");
        System.out.println("12. Percentage(%)");
        System.out.println("13. Dec to Bin");
        System.out.println("14. Dec to Oct");
        System.out.println("15. Dec to Hexa");
        System.out.println("16. Bin to Dec");
        System.out.println("17. Bin to Oct");
        System.out.println("18. Bin to Hexa");
        System.out.println("19. Oct to Dec");
        System.out.println("20. Oct to Bin");
        System.out.println("21. Oct to Hexa");
        System.out.println("22. Hexa to Dec");
        System.out.println("23. Hexa to Bin");
        System.out.println("24. Hexa to Oct");
        System.out.println("25. Bitwise OR");
        System.out.println("26. Bitwise AND");
        System.out.println("27. Bitwise X-OR");
        System.out.println("28. Sin()");
        System.out.println("29. Cos()");
        System.out.println("30. Tan()");


        Scanner input=new Scanner(System.in);
        boolean ok=true;
        while(ok) {
            long n=input.nextInt();

            if(n==0)
                break;

            if(n<=5) {
                ArithmeticCalculation obj = new ArithmeticCalculation(n);
            }
            else if(n<=12){
                Others obj = new Others(n);
            }
            else if(n<=24){
                NumberTransformation obj = new NumberTransformation(n);
            }
            else if(n<=27){
                BitwiseOperation obj = new BitwiseOperation(n);
            }
            else if(n<=30){
                TrigonometricFuntion obj = new TrigonometricFuntion(n);
            }

        }
    }

}