help me output either a list of failing students (Less than 65) or a list of students on honor roll(above 90). ONLY USING A LOOP AND IF STATEMEN

Question

using System;

public class Program

{

public static double[] arrayAvg(double[, ] a)

{

double[] tempArray = new double[a.GetLength(0)];

double sum = 0;

for (int i = 0; i < a.GetLength(0); i++)

{

for (int j = 0; j < a.GetLength(1); j++)

{

sum = sum + a[i, j];

}

double avg = sum / (a.GetLength(1));

tempArray[i] = avg;

sum = 0;

}

return tempArray;

}

public static void Main()

{

Console.WriteLine("How many students do you have?");

int students = int.Parse(Console.ReadLine());

string[] names = new string[students];

Console.WriteLine("Type your students names, pressing enter after each one");

for (int i = 0; i < names.Length; i++)

{

names[i] = Console.ReadLine();

Console.Clear();

}

Array.Sort(names);

Console.WriteLine("How many grades for each student?");

int numofgrades = int.Parse(Console.ReadLine());

double[, ] grades = new double[students, numofgrades];

for (int i = 0; i < grades.GetLength(0); i++)

{

Console.WriteLine("Please enter the grades for " + names[i]);

for (int j = 0; j < grades.GetLength(1); j++)

grades[i, j] = double.Parse(Console.ReadLine());

}

double[] myavg = arrayAvg(grades);

Console.WriteLine("Here's your gradebook!");

for (int i = 0; i < students; i++)

{

Console.Write(names[i] + ": ");

for (int j = 0; j < numofgrades; j++)

Console.Write(grades[i, j] + " ");

Console.Write("Final Average: " + myavg[i]);

Console.WriteLine();

}

}

}

using System;

public class Program

{

public static double[] arrayAvg(double[, ] a)

{

double[] tempArray = new double[a.GetLength(0)];

double sum = 0;

for (int i = 0; i < a.GetLength(0); i++)

{

for (int j = 0; j < a.GetLength(1); j++)

{

sum = sum + a[i, j];

}

double avg = sum / (a.GetLength(1));

tempArray[i] = avg;

sum = 0;

}

return tempArray;

}

public static void Main()

{

Console.WriteLine("How many students do you have?");

int students = int.Parse(Console.ReadLine());

string[] names = new string[students];

Console.WriteLine("Type your students names, pressing enter after each one");

for (int i = 0; i < names.Length; i++)

{

names[i] = Console.ReadLine();

Console.Clear();

}

Array.Sort(names);

Console.WriteLine("How many grades for each student?");

int numofgrades = int.Parse(Console.ReadLine());

double[, ] grades = new double[students, numofgrades];

for (int i = 0; i < grades.GetLength(0); i++)

{

Console.WriteLine("Please enter the grades for " + names[i]);

for (int j = 0; j < grades.GetLength(1); j++)

grades[i, j] = double.Parse(Console.ReadLine());

}

double[] myavg = arrayAvg(grades);

Console.WriteLine("Here's your gradebook!");

for (int i = 0; i < students; i++)

{

Console.Write(names[i] + ": ");

for (int j = 0; j < numofgrades; j++)

Console.Write(grades[i, j] + " ");

Console.Write("Final Average: " + myavg[i]);

Console.WriteLine();

}

}

}

Answer 1

class StudentGradeRec

{

protected String studentName;

protected double grades[];

protected int numGrades;

public StudentGradeRec( String nameStr, int numGrades)

{

studentName = new String(nameStr);

grades = new double[numGrades];

this.numGrades = numGrades;

}

public String GetStudentName() { return(studentName); }

public double IndexerGetGradeAtIndex(int iIndexPos)

{

double GradeReturn=-1;

if (iIndexPos>=0 && iIndexPos<numGrades)

{

GradeReturn = grades[iIndexPos];

}

return(GradeReturn);

}

public int IndexerSetGradeAtIndex(int iIndexPos, double grade)

{

int iReturn=0;

if (iIndexPos>=0 && iIndexPos<numGrades)

{

grades[iIndexPos]=grade;

}

else

{

iReturn=-1;

}

return(iReturn);

}

public double GetGradeAverage()

{

double sumGrade=0;

double gradeAvg=-1;

for (int iLoop=0; iLoop<numGrades; iLoop++)

{

sumGrade += grades[iLoop];

}

if (numGrades>0) { gradeAvg = sumGrade/numGrades; }

return(gradeAvg);

}

//deep copies

public StudentGradeRec( StudentGradeRec studentGradeRec)

{

this.studentName = new String(studentGradeRec.studentName);

this.numGrades = studentGradeRec.numGrades;

this.grades = new double[this.numGrades];

for (int iLoop=0; iLoop<this.numGrades; iLoop++)

{

this.grades[iLoop] = studentGradeRec.grades[iLoop];

}

}

public void Dump(String msgStr)

{

if (msgStr!=null)

{

System.out.println("*******************************************");

System.out.println(msgStr);

}

System.out.println(" Student Name :>" + studentName + "<");

for (int iLoop=0; iLoop<numGrades; iLoop++)

{

System.out.println(grades[iLoop]);

}

}

}

/************************************************************************************/

class Gradebook

{

protected StudentGradeRec gradebook[];

protected int numStudents;

public Gradebook ( int n)

{

numStudents = n;

gradebook = new StudentGradeRec[n];

for (int iLoop=0; iLoop<n; iLoop++)

{

gradebook[iLoop]=null;

}

}

public int GetNumStudents() { return(numStudents); }

public StudentGradeRec IndexerGetStudentGradeRecAtIndex( int iIndexPos)

{

StudentGradeRec studentGradeRecReturn=null;

if ( iIndexPos>=0 && iIndexPos < numStudents)

{

studentGradeRecReturn = gradebook[iIndexPos];

}

return(studentGradeRecReturn);

}

public int IndexerSetStudentGradeRecAtIndex(int iIndexPos, StudentGradeRec studentGradeRec)

{

int iReturn=0;

if ( iIndexPos>=0 && iIndexPos < numStudents)

{

gradebook[iIndexPos] = new StudentGradeRec(studentGradeRec);

}

else

{

iReturn=-1;

}

return(iReturn);

}

}

/*************************************************************/

import java.io.*;

import java.util.Scanner;

class StudentGradeMain

{

protected Gradebook Gradebook;

public static final String filename = "E:\\grades.dat";

protected int Read()

{

int iReturn=0;

int numStudents=-1;

int numGrades = -1;

String inbuff;

try

{

FileReader fileReader = new FileReader(filename);

BufferedReader bufferedReader = new BufferedReader(fileReader) ;

inbuff = bufferedReader.readLine();

String tokens[] = inbuff.split(",");

numStudents = Integer.parseInt(tokens[0].trim());

numGrades = Integer.parseInt(tokens[1].trim());

System.out.println(" # of students = " + numStudents);

System.out.println(" # of grade = " + numGrades);

Gradebook = new Gradebook(numStudents);

for (int studentLoop=0; studentLoop<numStudents; studentLoop++)

{

inbuff = bufferedReader.readLine();

tokens = inbuff.split(",");

Gradebook.gradebook[studentLoop] = new StudentGradeRec(tokens[0],numGrades);

for (int gradeLoop=0; gradeLoop<numGrades; gradeLoop++)

{

Gradebook.gradebook[studentLoop].IndexerSetGradeAtIndex(gradeLoop,Double.parseDouble(tokens[gradeLoop+1].trim()));

}

Gradebook.gradebook[studentLoop].Dump("student rec # " + (studentLoop+1) + " of " + numStudents);

}

bufferedReader.close();

}

catch (IOException ex)

{

iReturn=-1;

System.out.println(" ERROR READING/OPENING input file ");

}

return(iReturn);

}

public void Go()

{

Scanner scanner = new Scanner(System.in);

Read();

int iMenuChoice = -1;

while (iMenuChoice!=0)

{

while (iMenuChoice<0 || iMenuChoice>3)

{

System.out.println("*****************************************");

System.out.println(" <1> Failing Students (average<60) ");

System.out.println(" <2> Honor Roll Students (average>=90) ");

System.out.println(" <3> FULL GRADE REPORT ");

System.out.println("******************************************");

System.out.print(" Please input selection or ZER0 to quit :>");

iMenuChoice = scanner.nextInt();

}

if (iMenuChoice!=0)

{

int N = Gradebook.GetNumStudents();

for (int iLoop=0; iLoop<N; iLoop++)

{

StudentGradeRec curStudentGradeRec = Gradebook.gradebook[iLoop];

double gradeAvg = curStudentGradeRec.GetGradeAverage();

String studentName = curStudentGradeRec.GetStudentName();

if (

(iMenuChoice == 3) ||

( (iMenuChoice==2) && (gradeAvg>=90)) ||

( (iMenuChoice==1) && (gradeAvg<60))

)

{

System.out.println(studentName + " " + gradeAvg);

}

} //for

iMenuChoice=-1;

}

else

{

break;

}

} //while

} //Go

public static void main(String args[])

{

StudentGradeMain x = new StudentGradeMain();

x.Go();

}

}