/* 9/25/2019
 * (1) for loop
 *     used variable for both lower limit and upper limit
 *     used a different update than i++
 *     printed a table with headings
 * (2) introduce output files
 *     Must put the following 2 things:
 *     (a) import the java.io pkg
 *     (b) put "throws IOException"
 *     for output files, use class PrintWriter
 *     NOTE: if the file exists, it is destroyed every time you run your prgm
 */
import java.util.Scanner;
import java.io.*;

public class Celcius3 {
  /** main reads in BOTH the lower limit and upper limit 
    * and prints a table of all numbers from lower limit to upper limit
    * in both celcius and faranheit. Messages about hot/cold are also
    * printed.
    */
  public static void main(String[] args) throws IOException { 
    int celciusLow, celciusHi;
    Scanner sc = new Scanner(System.in);
    PrintWriter pw = new PrintWriter("MyIOFiles\\tempTable.txt");
    // notice the parallel between the syntax of creating a Scanner object
    // to creating a PrintWriter object
    System.out.println("Enter starting number of degrees celcius: ");
    celciusLow = sc.nextInt();
    
    System.out.println("Enter starting number of degrees celcius: ");
    celciusHi = sc.nextInt();
    System.out.println("Celcius  Faranheit      Message");
    pw.println("Celcius  Faranheit      Message");
    for (int i=celciusLow; i<=celciusHi; i+=5) {
       double faran = 9/5.0 * i + 32;
       System.out.printf("%4d  %8.1f      ",i,faran);
       pw.printf("%4d  %8.1f      ",i,faran);
       if (faran >= 80) {
          System.out.print("It is HOT!");
          pw.print("It is HOT!");
       }
       boolean isCold = faran <= 32;
       if (isCold) {
          System.out.print("It is cold.");
          pw.print("It is cold.");
       }     
       System.out.println();
       pw.println();
    } // end for loop
    sc.close();
    pw.close();
  }
}