Thread: Passing 2D array to method

Here's a friend's code. I included the entire thing in case you'd like to dump it into an IDE or whatever. Anyway, Eclipse is complaining about the following line:

System.out.println(student[t] + "\t\t" +highGrade(grades) + "\t\t" +lowGrade(grades)
+ "\t\t" +(averageGrade(grades)));

It says that 'grades' cannot be resolved to a variable. The intent of the code at this point is to pass the inner array of grades[][] to some methods, returning doubles to print. What is the proper syntax for this? (Note: I haven't checked out the methods yet, so there may also be errors there. But for now I'm just wondering about this syntax.)

Thanks!

 
import java.util.*;
 
public class Midterm {
 
	public static void main(String[] args) {
 
		Scanner input = new Scanner(System.in);
 
		System.out.println("Please enter the number of students: ");
		int numofStudents = input.nextInt();
 
		String student[] = new String[numofStudents];
 
		for (int i = 0; i < numofStudents; i++)	{
 
			// collect student name
			System.out.println("Enter the " +  numName(i+1) + " student's name: ");
			student[i] = input.next();	
 
			// collect grades
 
			double grades[][] = new double[student.length][];
			grades[i] = collectGrades();
 
		}	//end for
 
	// print information
 
		System.out.println("Student Name\tHigh Score\tLow Score\tAverage\tGrade");
	    System.out.println("----------------------------------------------------------");
 
	    for(int t = 0; t < numofStudents; t++) {
 
 
			System.out.println(student[t] + "\t\t" +highGrade(grades) + "\t\t" +lowGrade(grades)  
					+ "\t\t" +(averageGrade(grades)));
 
	    }	//end for
 
}	//end main
 
	public static double[] collectGrades()	{
		Scanner input = new Scanner(System.in);
		System.out.println("Please enter the number of grades you will be entering for this student:");
		int numOfGrades = input.nextInt();
 
		double gradeArrayOut[] = new double[numOfGrades];
 
		for (int i = 0; i < gradeArrayOut.length; i++)	{
			System.out.println("Please enter the " + numName(i + 1) + " grade:");
			gradeArrayOut[i] = input.nextDouble();
		}	//end for
 
		return gradeArrayOut;
	}	//end collectGrades
 
	public static double highGrade (double arrayIn[]) {
		Arrays.sort(arrayIn);
		return arrayIn[arrayIn.length -1];
 
	} // end highGrade
 
	public static double lowGrade (double arrayIn[]) {
		Arrays.sort(arrayIn);
		return arrayIn[0];
 
	} // end highGrade
 
	public static double averageGrade(double arrayIn[]) {
		double avgGrade = 0.0;
		for(int i = 0;i < arrayIn.length;i++) {
			avgGrade += arrayIn[i];
 
		} // end for
 
		return avgGrade/arrayIn.length;
 
	} // end averageGrade
 
 
	public static String numName(int intIn) {
		String numName = "";
		switch(intIn) {
		case 1:
			numName = "first";
			break;
		case 2: 
			numName = "second";
			break;
		case 3:
			numName = "third";
			break;
		case 4: 
			numName = "fourth";
			break;
		case 5:
			numName = "fifth";
			break;
		case 6: 
			numName = "sixth";
			break;
		case 7:
			numName = "seventh";
			break;
		case 8: 
			numName = "eight";
			break;
		case 9:
			numName = "ninth";
			break;
		case 10: 
			numName = "tenth";
			break;
		default:
			numName = intIn + (intIn<20?"th" : (intIn%10==1?"st":
			(intIn%10==2?"nd": (intIn%10==3?"rd":"rh"))));
		} //end Switch
 
		return numName;
 
	}
 
}	//end class