MuradHomeWork

import java.util.Scanner;
//Murad Ragimli
public class fixing {

    public static void main(String[] args) {
       Scanner in = new Scanner(System.in);
     // EXERCISE 6
       System.out.println("Till which number do you want?");
       int num = 0;
       num = in.nextInt();
       for (int i = 1; i <= num; i++)
       {
        System.out.println(i + "! is " + fact(i));
       }

       System.out.println("*****************************************************");
       System.out.println("*****************************************************");

    // EXERCISE 7
       int number=1;
       while(number>0)
       {
           System.out.println("Please enter the number:");
           number = in.nextInt();
           System.out.println("The sum of its numbers is " + sumDigit(number));
           System.out.println("The number of its numbers is " + numDigit(number));
       }

       System.out.println("*****************************************************");
       System.out.println("*****************************************************");

    // EXERCISE 9
       double r=0;
       int num1=1, num2=0, num3=0, num4=0;
       while(num1 == 1 || num1 == 2 || num1 == 3)
       {
            System.out.println("Please enter the first number");
            num1 = in.nextInt();
            if(num1 < 1 || num1 > 3)
                break;
            System.out.println("Please enter the second number");
            num2 = in.nextInt();
            System.out.println("Please enter the third number");
            num3 = in.nextInt();
            System.out.println("Please enter the fourth number");
            num4 = in.nextInt();
            if (num1 == 1)
                r = average(num2 + num3);
            else if(num1 == 2)
                r = average(num2 + num4);
            else if(num1 == 3)
                r = average(num3 + num4);
            System.out.println("The result is " + r);
       }

       System.out.println("*****************************************************");
       System.out.println("*****************************************************");

       // EXERCISE 17
       int line = 0;
       System.out.println("Please enter the first number:");
       int digit = in.nextInt();
       if(!(digit >= 1 && digit <= 9))
           {
             System.out.println("Please enter the first number again:");
             digit = in.nextInt();
           }
       System.out.println("Please enter the second number:");
       line = in.nextInt();
       if(!(line >= 1 && line <= 9))
       {
         System.out.println("Please enter the second number again:");
         line = in.nextInt();
       }
       int lineline = line;
        for(int i=1; i<lineline; i++, line--)
           {
             for(int j=0; j<line; j++)
             {
                System.out.print(digit);
             }
             System.out.println();
           }
        line(digit);
        num2--;
        for(int i=0; i<=lineline; i++, line++)
           {
             for(int j=0; j<line; j++)
             {
                System.out.print(digit);
             }
             System.out.println();
           }

    }
    /*
     * exercise 6
     * input - (int) number
     * output - (int) factorial of this number
     */
    public static int fact(int num) {
        int r=1;
        while(num>0)
        {
            r *= num;
            num--;
        }
        return r;
    }
    /*
     * exercise 7.1
     * input -  (int) number
     * output - (int) sum of it digits
     */
    public static int sumDigit(int number) {
        int sum=0;
        while(number > 0)
        {
            sum += number%10;
            number/=10;
        }
        return sum;
    }
    /*
     * exercise 7.2
     * input -  (int) number
     * output - (int) number of it digits
     */
    public static int numDigit(int number) {
        int i=0;
        while(number > 0)
        {
            number/=10;
            i++;
        }
        return i;
    }
    /*
     * exercise 9
     * input - (double) sum of numbers
     * output - (double) half of this sum
     */
    public static double average(int num) {
        return num/2;
    }
    /*
     * exercise 17, seyf alef
     * input - (int) number
     * output - (void) line
     */
    public static void line(int digit) {
        System.out.print(digit);
    }

}