Help with Program

[danman33]

I need to get the minimum and maximum values from the input of grades and I cant seem to get it. Its all the way at the end of the code. PLEASE HELP.

import TerminalIO.KeyboardReader;

public class project64 { //Project 6-4

public static void main (String [] args) {
KeyboardReader reader = new KeyboardReader();

int gradeTally; // sum of inputs of grades
int numGrades; // Number of grades inputed
int avg; // outputs class average
int grade; // grade entered by the user.
int minimum; // outputs class minimum
int maximum; // outputs class maximum
int gradeNum;
char letter; // letter grade for computed average.
int getMinimum;
gradeTally = 0;
numGrades = 0;

System.out.print( "Enter the first grade (value -1 to stop): " );
grade = reader.readInt();

while( grade >= 0 ) {
gradeTally = gradeTally + grade;
numGrades++;

System.out.print( "Enter the next grade (value -1 to stop): " );
grade = reader.readInt();

}

avg = gradeTally / (int) numGrades;
grade = avg;
if( grade >= 89.5 )
letter = 'A';
else if( grade >= 79.5 )
letter = 'B';
else if( grade >= 69.5 )
letter = 'C';
else if( grade >= 59.5 )
letter = 'D';
else
letter = 'F';


System.out.println( "The average of the grades is:" + avg );
System.out.println( "Letter Grade = " + letter );

getMinimum = grade;
System.out.println ("The class Minimum is " +getMinimum+" which is a: " + letter);
maximum = Math.max(grade, grade);
System.out.println ("The class Maximum is " +maximum+" which is a: " + letter);
}
}

[sjalle]

I would say its not at the end of the code, more like all over, but no offense,
I just have a feeling that you are quite new to algorithms and computing.

Have a look at this extreme makeover that I have done to your code.
The reason for me using the getKeyboardInt method is explained in the
comment.

import java.io.*;

public class project64 { //Project 6-4
  static BufferedReader keyboard=new BufferedReader(new InputStreamReader(System.in));
  /**
   * Show user prompt and get integer input
   * (I use this since I haven't got the TerminalIO.KeyboardReader)
   * @param prompt
   * @return
   */
  private int getKeyboardInt(String prompt) {
    String line=null;
    while (true) {
      System.out.println(prompt);
      try {
        line = keyboard.readLine();
        int ret = Integer.parseInt(line.trim());
        return ret;
      }
      catch (IOException ex) {
        System.out.println("An error occurred");
      }
      catch (NumberFormatException ex) {
        System.out.println(line+" is not an integer, please reenter");
      }

    }
  }
  /**
   * check a value and return the corresponding letter
   * @param d
   * @return
   */
  private char getLetter(double d) {
    if (d >= 89.5)
      return 'A';
    else if (d >= 79.5)
      return 'B';
    else if (d >= 69.5)
      return 'C';
    else if (d >= 59.5)
      return 'D';
    else
      return 'F';
  }
  /**
   * Do the user input and accumulation
   */
  public void doIt() {
    int gradeTally=0; // sum of inputs of grades
    int numGrades=0; // Number of grades inputed
    double avg; // outputs class average
    int grade; // grade entered by the user.
    int minimum=Integer.MAX_VALUE; // outputs class minimum
    int maximum=Integer.MIN_VALUE; // outputs class maximum

    while (true) {
      grade=getKeyboardInt("Enter a grade (value -1 to stop): ");
      if (grade == -1) break;
      gradeTally += grade;
      numGrades++;
      minimum=(grade < minimum) ?  grade : minimum;
      maximum=(grade > maximum) ?  grade : maximum;
    }
    if (numGrades==0) {
      System.out.println("No data was entered, program will terminate");
      return;
    }

    avg = (double)gradeTally/(double) numGrades;

    System.out.println("The average of the grades is:" + avg);
    System.out.println("Letter Grade = " + getLetter(avg));


    System.out.println("The class Minimum is " + minimum + " which is a: " +
                       getLetter((double)minimum));

    System.out.println("The class Maximum is " + maximum + " which is a: " +
                       getLetter((double)maximum));
  }
  /**
   * **************** MAIN ****************
   * @param args
   */
  public static void main(String[] args) {
    project64 p64=new project64 ();
    p64.doIt();
  }
}

[danman33]

Yes, I am new to java. Thanks ALOT for your help!!

[jeanrose]

ei help me 2 create a java program about the game wordhunt tnx

[sjalle]

? pls be more specific