/* Qaiyum Mohammmad | 2018.09.26 */
/* Problem Set 2, all questions */

import java.util.*;
import java.text.DecimalFormat;

class Main {
  public static void main(String[] args) {

     // new scanners
  Scanner sc = new Scanner(System.in);
     // this ones for strings only
  Scanner str = new Scanner(System.in);

  DecimalFormat dec = new DecimalFormat (".###");




// Problem Set 2 #1
  /* Ask the user for a number and print that many '*'
  characters in a vertical line. */

  System.out.println ("");
  System.out.println ("__________________");
  System.out.println ("Problem Set 2 #1");
  System.out.println ("__________________");
  System.out.println ("");

  // declare variables
  int  asteriskNum;
  double  rectHeight;
  double  rectWidth;

  // asks for number
  System.out.print ("How many asterisks do you want? (please insert whole number) : ");
  asteriskNum = sc.nextInt();


  /* while asteriskNum is greater than 0, an asterisk will print. However, each
   loop will also decrease the value of asteriskNum by 1 */
  while ( asteriskNum > 0 )
  {

    System.out.println ("*");
    asteriskNum--;
  }

// Problem Set 2 #2
  /* Ask the user for a number and print that many '*'
  characters in a horizontal line.   */

  System.out.println ("");
  System.out.println ("__________________");
  System.out.println ("Problem Set 2 #2");
  System.out.println ("__________________");
  System.out.println ("");

  // asteriskNum has been previously declared

  // asks for number
  System.out.print ("How many asterisks do you want? (please insert whole number) : ");
  asteriskNum = sc.nextInt();

  /* while asteriskNum is greater than 0, an asterisk will print. However, each
   loop will also decrease the value of asteriskNum by 1 */
   while ( asteriskNum > 0 )
  {


    System.out.print ("*");
    asteriskNum--;
  }

// Problem Set 2 #3
  /* Ask a user for a number and
  print a solid square of '*' characters.   */

  System.out.println ("");
  System.out.println ("__________________");
  System.out.println ("Problem Set 2 #3");
  System.out.println ("__________________");
  System.out.println ("");

  // asteriskNum has been previously declared

  // asks for number
  System.out.print ("How many asterisks do you want? (please insert whole number) : ");
  asteriskNum = sc.nextInt();

  /* while asteriskNum is greater than 0, an asterisk will print. However, each
   loop will also decrease the value of asteriskNum by 1 */

  /* this same rule also applies to how many times the line of asterisk will print,
  which is the same as how many asterisks in a single line since a square has the
  same width as it does length */

  for (int i=asteriskNum; i>0; i--)
  {
   for (int j=asteriskNum; j>0; j--)
   {
       System.out.print("*");
   }
   System.out.print("\n");
  }


// Problem Set 2 #4
  /* Your teacher needs help calculating the class average.
  Your program will ask how many students are in the class,
  and it will then accept that many number of grades,
  and calculate the class average.   */

  System.out.println ("");
  System.out.println ("__________________");
  System.out.println ("Problem Set 2 #4");
  System.out.println ("__________________");
  System.out.println ("");

  // declare variables
  double grade = 0;
  int numStudent = 0;
  double numGrade = 0;


  // asks for the number of students
  System.out.println("Please enter the total number of students: ");
  numStudent = sc.nextInt();


  /* k = number of students. When the number of students is
  greater than 0, it will decrease k by 1 each loop.
  Each loop asks for a grade and adds the value of the
  grades onto the variable numGrade
  */
   for (int k = numStudent; k >0; k--) {
            System.out.println("Please enter the students' grades: ");
            grade = sc.nextDouble();
            numGrade += grade;
            }


  // prints the average as numGrade divided by number of students
  System.out.println("The class average is: ");
  System.out.print (numGrade/numStudent);

// Problem Set 2 #5
  /* Write a password checker. Your password checker will first ask for a password,
  then repetitively ask the user to guess at the password. When
  the user types the same password, acknowledge that the right
  password was provided. DO NOT USE AN IF STATEMENT. */

  System.out.println ("");
  System.out.println ("__________________");
  System.out.println ("Problem Set 2 #5");
  System.out.println ("__________________");
  System.out.println ("");

  // declare variables
  String password;
  String userGuess;

  // asks for a password
  System.out.print ("Enter a password:");
  password = str.nextLine();

  // keeps guessing until guess = password
  do {
    System.out.print ("Enter a guess:");
    userGuess = str.nextLine();

  }

  while (!password.equals (userGuess));
  System.out.println ("Correct Password");

// Problem Set 2 #6
  /* Write a program that asks for a numeric range.  For all
  the numbers in that range, calculate and display  the square,
  square root and cube of the numbers.  Keep all numbers to 3
  decimal points */

  System.out.println ("");
  System.out.println ("__________________");
  System.out.println ("Problem Set 2 #6");
  System.out.println ("__________________");
  System.out.println ("");

  // declare variables
  double rangeEnd;
  double rangeStart;

  // asks for the range
  System.out.print ("Enter the start of the range:");
  rangeStart = sc.nextDouble();

  System.out.print ("Enter the end of the range:");
  rangeEnd = sc.nextDouble();

  System.out.println ("");

  System.out.println ("FORMAT IS THE FOLLOWING:");
  System.out.println ("Number, square, square root, cube");

  while ( rangeEnd >= rangeStart)
  {
    System.out.println ("");

    System.out.print (rangeEnd); // prints the number
    System.out.print (", ");
    System.out.print (Math.pow(rangeEnd, 2)); // prints number^2
    System.out.print (", ");
    System.out.print ((dec.format(Math.sqrt(rangeEnd)))); // prints sqrtroot of number
    System.out.print (", ");
    System.out.print (Math.pow(rangeEnd, 3)); //prints number ^3
    rangeEnd--;

  }

// Problem Set 2 #7
  /* Write a program which will decide if a number is even or odd,
  positive, negative or 0.  Output all necessary information */

  System.out.println ("");
  System.out.println ("__________________");
  System.out.println ("Problem Set 2 #7");
  System.out.println ("__________________");
  System.out.println ("");

  // declare variables

  int numUser;
  double numRemainder;

  System.out.println ("Enter a whole number:");
  numUser = sc.nextInt();

  // Checks is the number is even (or disvisible by two)
  numRemainder = numUser % 2;

  // Checks if the number is zero
  if (numUser == 0) {
    System.out.println ("That number is equal to 0");

  }

  // This checks if the number is positive
  else if (numUser > 0){
    System.out.println ("That number is positive");
  }
  else {
  // This checks that if it isn't positive or zero, it's negative
    System.out.println ("That number is negative");
  }


  // Checks if the number is even
  if (numRemainder == 0) {
    System.out.println ("Your number is even.");
  }
  else {    // If it's not even, the number is odd.
    System.out.println ("Your number is odd.");
  }

// Problem Set 2 #8
  /* determine whether a year is a leap year */

  System.out.println ("");
  System.out.println ("__________________");
  System.out.println ("Problem Set 2 #8");
  System.out.println ("__________________");
  System.out.println ("");

 int year ;
 boolean yearLeap ;

 System.out.println ("Enter a year:");
 year = sc.nextInt();

 // divisible by 4
 yearLeap = (year % 4 == 0);

 // divisible by 4, but not 100
 yearLeap = yearLeap && (year % 100 != 0);

 // divisible by 4 but not 100 unless divisible by 400
 yearLeap = yearLeap || (year % 400 == 0);

 System.out.println("This year is a leap year:");
 System.out.println(yearLeap);

// Problem Set 2 #9
  /* Determine the astrological sign given the month and
  day of the person’s birthday */

  System.out.println ("");
  System.out.println ("__________________");
  System.out.println ("Problem Set 2 #9");
  System.out.println ("__________________");
  System.out.println ("");

  // declares variables
  int month;
  int day;

  System.out.println ("Enter your birth month in number format (ex: January = 01) :");
  month = sc.nextInt();

  System.out.println ("Enter your birth year:");
  day = sc.nextInt();

    System.out.println("Your sign is:");

  // if your birthday is between xx.xx OR xx.xx you are XXXXXX

  if      ((month == 12 && day >= 22 && day <= 31) || (month ==  1 && day >= 1 && day <= 19))
  System.out.println("Capricorn");
  else if ((month ==  1 && day >= 20 && day <= 31) || (month ==  2 && day >= 1 && day <= 17))
  System.out.println("Aquarius");
  else if ((month ==  2 && day >= 18 && day <= 29) || (month ==  3 && day >= 1 && day <= 19))
  System.out.println("Pisces");
  else if ((month ==  3 && day >= 20 && day <= 31) || (month ==  4 && day >= 1 && day <= 19))
  System.out.println("Aries");
  else if ((month ==  4 && day >= 20 && day <= 30) || (month ==  5 && day >= 1 && day <= 20))
  System.out.println("Taurus");
  else if ((month ==  5 && day >= 21 && day <= 31) || (month ==  6 && day >= 1 && day <= 20))
  System.out.println("Gemini");
  else if ((month ==  6 && day >= 21 && day <= 30) || (month ==  7 && day >= 1 && day <= 22))
  System.out.println("Cancer");
  else if ((month ==  7 && day >= 23 && day <= 31) || (month ==  8 && day >= 1 && day <= 22))
  System.out.println("Leo");
  else if ((month ==  8 && day >= 23 && day <= 31) || (month ==  9 && day >= 1 && day <= 22))
  System.out.println("Virgo");
  else if ((month ==  9 && day >= 23 && day <= 30) || (month == 10 && day >= 1 && day <= 22))
  System.out.println("Libra");
  else if ((month == 10 && day >= 23 && day <= 31) || (month == 11 && day >= 1 && day <= 21))
  System.out.println("Scorpio");
  else if ((month == 11 && day >= 22 && day <= 30) || (month == 12 && day >= 1 && day <= 21))
  System.out.println("Sagittarius");

  // date was not entered correctly
  else
  System.out.println("You entered your birthday incorrectly. Skipping program.");

// Problem Set 2 #10
  /*  Credit card application evaluation. Based on the input values, points are obtained.
  Based on the total points, various actions are taken.y */

  System.out.println ("");
  System.out.println ("__________________");
  System.out.println ("Problem Set 2 #10");
  System.out.println ("__________________");
  System.out.println ("");

  // Declare variables
  double creditAge, creditCurrent, creditIncome, workCurrent;
  int creditPoints;

  // asks for age
  System.out.print ("How old are you? ");
  creditAge = sc.nextDouble ();

  // asks how long you lived in your home
  System.out.print ("How long have you lived in your current place of residence?");
  creditCurrent = sc.nextDouble ();

  // asks for annual income
  System.out.print ("Please enter your annual income: ");
  creditIncome = sc.nextDouble ();

   // asks how long they had their job
  System.out.print ("For how long have you been working your current job? ");
  workCurrent = sc.nextDouble ();

  // if age is under 20, deduct 10 points
  if (20 >= creditAge) {
    creditPoints = -10;
  }

  // if age is between 21 and 30, leave points unchanged
    else if (21 <= creditAge && 30 >= creditAge) {
      creditPoints = 0;
    }

  // if age is between 31 and 50, allott 20 points
    else if (31 <= creditAge && 50 >= creditAge) {
      creditPoints = 20;
    }

  // if age is 50+, allot 25 points
    else {
      creditPoints = 25;
    }

  // if they lived in their home for less than 1 years, deduct 5 points
  if (1 > creditCurrent) {
    creditPoints += -5;
  }

  // if they lived in their home for 1-3 years, allot 5 points
    else if (1 <= creditCurrent && 3 >= creditCurrent) {
      creditPoints += 5;
    }

  // if they lived in their home for 4-8 years, allot 12 points
    else if (4 <= workCurrent && 8 >= workCurrent) {
      creditPoints += 12;
    }

  // if they lived in their home for 8+ years, allot 20 points
    else {
      creditPoints += 20;
    }

  if (15000 > creditIncome) {
    creditPoints += 0;
  }
    else if (15000 <= creditIncome && 25000 > creditIncome) {
      creditPoints += 12;
    }
    else if (25000 <= creditIncome && 40000 >= creditIncome) {
      creditPoints += 24;
    }
    else {
      creditPoints += 30;
    }

  if (2 > workCurrent) {
    creditPoints += -4;
  }
    else if (2 <= workCurrent && 4 >= workCurrent) {
      creditPoints += 8;
    }
    else {
      creditPoints += 15;
    }


  // prints results
  if (20 >= creditPoints) {
    System.out.println ("Sorry, you are not eligible for a credit card.");
  }
    else if (21 <= creditPoints && 35 >= creditPoints) {
      System.out.println ("You are eligible for a credit card with a $500 limit.");
    }
    else if (36 <= creditPoints && 60 >= creditPoints) {
      System.out.println ("You are eligible for a credit card with a $2000 limit.");
    }
    else {
      System.out.println ("You are eligible for a credit card with a $5000 limit.");
    }


  // Problem Set 2 #11
  /*   Postage problem. Given the weight of a letter in grams, output the cost of the postage: */

  System.out.println ("");
  System.out.println ("__________________");
  System.out.println ("Problem Set 2 #11");
  System.out.println ("__________________");
  System.out.println ("");


  // Declare variables
  double weight, cost;

    // User inputs the weight of their letter
  System.out.print ("Enter the weight of your letter (in grams): ");
  weight = sc.nextDouble ();

  if (30 >= weight) {
    System.out.println ("The cost of postage is 48 ¢.");
  }

    else if (50 >= weight) {
      System.out.println ("The cost of postage is 70 ¢.");
    }
    else if (100 >= weight) {
      System.out.println ("The cost of postage is 90 ¢.");
    }
    else {
      weight = (weight-100);
      weight = (weight/50);
      weight = Math.ceil(weight);
      cost = 90 + (weight*18);

      if (100 <= cost) {
        cost = cost/100;
        System.out.println ("The cost of postage is $" + dec.format(cost) + ".");
      }
      else {
      System.out.println ("The cost of postage is " + dec.format(cost) + " ¢.");
    } }







// god damn qaiyum stop touching these brackets
  }
}