New to Java - last minute homework help!
I have been working on this assignment for 3 weeks and need to submit it by 12/21/06. I cannot compile the code, and I have a feeling it is a simple error in the order of my code, but I cannot seem to figure it out. Can anyone please look at my code and help me find my error?
//Filename: Lab10Rough.java
//Purpose: Print a formatted student grade report to a file named "Lab10.txt"
import java.text.*; //imports java text class
import java.io.*; //imports java io class
public class Lab10Rough
{
public static void main(String[] args) throws Exception
{
String stuName; //student name string
String stuNum; //student name string
String courseNamSec; //course name and section string
String numCoursesString; //String for number of courses taken
String gpaOutput; //formatted output string for grade point average
String letterGradeString; //final letter grade string
float gradePoints; //creates variable for number of gradepoints per letter grade
char letterGrade; //variable for letter grade
double numCourses; //variable for number of courses
double gpa; //variable for grade point average
double sumGradePoints; //variable for total number of grade points
double count; //variable for counter
FileWriter fw = new FileWriter("Lab10.txt"); //creates file "Lab10.txt"
BufferedWriter bw = new BufferedWriter(fw); //writes buffer to file
PrintWriter pw = new PrintWriter(bw); //prints to buffer
DecimalFormat num = new DecimalFormat("###.00"); //decimal format for named num
InputStreamReader isr = new InputStreamReader(System.in); //creates stream input reader isr
BufferedReader br = new BufferedReader(isr); //reads input stream to buffer
System.out.print("Enter the number of courses taken: "); //prompt user for number of courses
numCoursesString = br.readLine(); //reads number of courses string to buffer
numCourses = Double.parseDouble(numCoursesString); //converts string to usable number
System.out.print("Enter your name: "); //prompt user for name
stuName = br.readLine(); //reads name string to buffer
System.out.print("Enter your student number: "); //prompt user for student number
stuNum = br.readLine(); //reads student number to buffer
pw.println("Bucks County Community College Grade Report For"); //output heading
pw.println(stuName); //output subheading
pw.println(stuNum);//output sub-subheading
pw.println("Course \tGrade \tGradepoints"); //output column heading
for(count = 0; count < numCourses; count++) //counter controlled loop
{
//prompt user for course name and section
System.out.print("What is your course name and section? (ex. CISC115.59): ");
courseNamSec = br.readLine(); //reads course name and section string to buffer
//prompt user for letter grade
System.out.print("What is your letter grade for the course? (no + or -): ");
letterGradeString = br.readLine(); //reads letter grade string to buffer
letterGrade = letterGradeString.charAt(0); //converts string to usable character
switch(letterGrade) //assigns grade points based on letter grade
{
case 'A':
gradePoints = 4.00f; //grade points for an 'A' letter grade
break;
case 'B':
gradePoints = 3.00f; //grade points for a 'B' letter grade
break;
case 'C':
gradePoints = 2.00f; //grade points for a 'C' letter grade
break;
case 'D':
gradePoints = 1.00f; //grade points for a 'D' letter grade
break;
case 'F':
gradePoints = 0.00f; //grade points for an 'F' letter grade
break;
default:
gradePoints = 0.00f; //default grade points for invalid entry
System.out.println("Invalid letter entry"); //output for an invalid letter grade
break;
}
}
pw.println(courseNamSec + "\t" + letterGrade + "\t" + gradePoints); //output to file
sumGradePoints += gradePoints; //adds all grade points to get a total number of grade points
gpa = sumGradePoints / numCourses; //calculates grade point average
gpaOutput = num.format(gpa); //formats grade point average output
pw.println(gpaOutput); //writes grade point average output to file
pw.close(); //exit
}
}
