Final exam requirement - helping students

Program.cs

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MainProject
{
    class Program
    {
        //Drivers License Variable
        int totalNumberOfCorrectAnswers = 0;

        static void Main(string[] args)
        {

            Console.WriteLine("Main Menu");
            Console.WriteLine("1.   Students & Grades");
            Console.WriteLine("2.   Rainfall Statistics");
            Console.WriteLine("3.   Charge Account Validation");
            Console.WriteLine("4.   Payroll");
            Console.WriteLine("5.   Drivers Licence Exam");
            Console.WriteLine("6.   Quit this menu");
            Console.WriteLine("Enter your choice");

            int uInput = Convert.ToInt32(Console.ReadLine());

            do
            {
                switch (uInput)
                {
                    case 1:
                        {
                            // Console.WriteLine("Students & Grades");
                            StudentsAndGrades();
                            break;
                        }
                    case 2:
                        {
                            //Console.WriteLine("Rainfall Statistics");
                            RainfallStatistics();
                            break;
                        }
                    case 3:
                        {
                            //Console.WriteLine("Charge Account Validation");
                            ChargeAccountValidation();
                            break;
                        }
                    case 4:
                        {
                            //Console.WriteLine("Payroll");
                            Payroll();
                            break;
                        }
                    case 5:
                        {
                            //Console.WriteLine("Drivers Licence Exam");
                            DriversLicenceExam();
                            break;
                        }
                    default:
                        {
                            //Console.WriteLine("ERROR: Please enter a number between 1 and 6");
                            Environment.Exit(0);
                            break;
                        }
                }

                uInput = Convert.ToInt32(Console.ReadLine());

            }

            while (uInput != 6);

        }

        private static void StudentsAndGrades()
        {
            int numberOfStudents;
            int numberOfTestsPerStudent;

            //Number of students
            do
            {
                Console.WriteLine("How many students ?");
                numberOfStudents = Convert.ToInt32(Console.ReadLine());
            }
            while (numberOfStudents < 0 || numberOfStudents == 0);


            do
            {
                //Number of tests per student
                Console.WriteLine("How many tests ?");
                numberOfTestsPerStudent = Convert.ToInt32(Console.ReadLine());
            }
            while (numberOfTestsPerStudent < 0 || numberOfTestsPerStudent == 0);

            //Grade per student pair
            var TestsPerStudentlist = new List<KeyValuePair<int, int>>();

            int s = 0;
            //per each student
            do
            {
                int t = 0;
                //per each test
                do
                {
                    Console.WriteLine("Enter grade for student " + (s + 1) + " test " + (t + 1) + " : ");
                    int sGrade = Convert.ToInt32(Console.ReadLine());
                    TestsPerStudentlist.Add(new KeyValuePair<int, int>((s + 1), sGrade));
                    t++;
                }
                while (t < numberOfTestsPerStudent);

                s++;
            }
            while (s < numberOfStudents);


            // output results
            // number of students* tests
            double globalAverage = 0.0;
            for (int student = 0; student < numberOfStudents; student++)
            {
                int result = TestsPerStudentlist.Where(x => x.Key == (student + 1)).Sum(x => x.Value);
                string studentsAverage = Convert.ToString((double)(result / numberOfTestsPerStudent));
                globalAverage = globalAverage + Convert.ToDouble(studentsAverage);
                Console.WriteLine("For student " + (student + 1) + " the average is: " + studentsAverage + " and the sum of grades is " + result);
            }
            Console.WriteLine();
            Console.WriteLine("The average of the average of all students is: " + (double)(globalAverage / numberOfStudents));
            Console.WriteLine("Enter MAIN MENU choice");

        }

        private static void RainfallStatistics()
        {
            //Rainfall Statistics

            int counter = 0;
            string[] Months = new string[] { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" };
            var RainfallPerMonth = new List<KeyValuePair<int, int>>();
            do
            {
                Console.WriteLine("Enter the total rainfall for  " + (Months[counter].ToString()) + ":");
                int rainfallUnits = Convert.ToInt32(Console.ReadLine());
                RainfallPerMonth.Add(new KeyValuePair<int, int>(counter, rainfallUnits));
                counter++;
            }
            while (counter < Months.Length);


            int totalRainfallForTheYear = TotalRainfallForTheYear(RainfallPerMonth);
            double averagemonthlyRainfall = AverageMonthlyRainfall(RainfallPerMonth);
            int[] highestAndLowest = HighestMonthAndLowest(RainfallPerMonth);

            Console.WriteLine("The total rainfall for the year is: " + totalRainfallForTheYear);
            Console.WriteLine("The average monthly rainfall is: " + averagemonthlyRainfall);
            Console.WriteLine("Month with the highest amount of rain: " + Months[highestAndLowest[0] - 1].ToString());
            Console.WriteLine("Month with the lowest amount of rain: " + Months[highestAndLowest[1] - 1].ToString());

            Console.WriteLine("Enter MAIN MENU choice");
        }

        private static void ChargeAccountValidation()
        {
            //Charge Account Validation
            int[] ValidChargeAccountNumbers = new int[18] { 5658845, 4520125, 7895122, 8777541, 8451277, 1302850, 8080152, 4562555, 5552012, 5050552, 7825877, 1250255, 1005231, 6545231, 3852085, 7576651, 7881200, 4581002 };

            Console.WriteLine("Charge Account Validation - Sequential Search");
            Console.WriteLine("Please enter a number");

            int uInput = Convert.ToInt32(Console.ReadLine());

            bool isValidNumber = IsValid(ValidChargeAccountNumbers, uInput);

            if (isValidNumber)
            {
                Console.WriteLine("The number is VALID !");
            }
            else
            {
                Console.WriteLine("The number is NOT VALID !");
            }

            Console.WriteLine("Enter MAIN MENU choice");
        }

        private static void Payroll()
        {
            int[] empId = new int[7] { 56588, 45201, 78951, 87775, 84512, 13028, 75804 };
            int[] hours = new int[7];
            double[] payRate = new double[7];
            double[] wages = new double[7];


            int t = 0;
            //per each test
            do
            {
                Console.WriteLine("Employee number: " + empId[t]);
                Console.WriteLine("Enter hours: ");
                hours[t] = Convert.ToInt32(Console.ReadLine());

                Console.WriteLine("Enter pay rate: ");
                string doublePayRate = Console.ReadLine();
                double tmp = Convert.ToDouble(doublePayRate, CultureInfo.InvariantCulture);
                payRate[t] = tmp;

                Console.WriteLine("----------------------------------------");

                t++;
            }
            while (t < 7);

            //Calculating gross wages for each employee
            wages[0] = Convert.ToDouble(hours[0], CultureInfo.InvariantCulture) * payRate[0];
            wages[1] = Convert.ToDouble(hours[1], CultureInfo.InvariantCulture) * payRate[1];
            wages[2] = Convert.ToDouble(hours[2], CultureInfo.InvariantCulture) * payRate[2];
            wages[3] = Convert.ToDouble(hours[3], CultureInfo.InvariantCulture) * payRate[3];
            wages[4] = Convert.ToDouble(hours[4], CultureInfo.InvariantCulture) * payRate[4];
            wages[5] = Convert.ToDouble(hours[5], CultureInfo.InvariantCulture) * payRate[5];
            wages[6] = Convert.ToDouble(hours[6], CultureInfo.InvariantCulture) * payRate[6];


            for (int j = 0; j < 7; j++)
            {
                displayWages(wages, empId, j);
            }


            Console.WriteLine("Enter MAIN MENU choice");
        }

        private static void DriversLicenceExam()
        {
            var CorrectExamAnswers = new List<KeyValuePair<int, string>>();
            CorrectExamAnswers.Add(new KeyValuePair<int, string>(1, "B"));
            CorrectExamAnswers.Add(new KeyValuePair<int, string>(2, "D"));
            CorrectExamAnswers.Add(new KeyValuePair<int, string>(3, "A"));
            CorrectExamAnswers.Add(new KeyValuePair<int, string>(4, "A"));
            CorrectExamAnswers.Add(new KeyValuePair<int, string>(5, "C"));
            CorrectExamAnswers.Add(new KeyValuePair<int, string>(6, "A"));
            CorrectExamAnswers.Add(new KeyValuePair<int, string>(7, "B"));
            CorrectExamAnswers.Add(new KeyValuePair<int, string>(8, "A"));
            CorrectExamAnswers.Add(new KeyValuePair<int, string>(9, "C"));
            CorrectExamAnswers.Add(new KeyValuePair<int, string>(10, "D"));


            Console.WriteLine("Please enter user's answers: ");


            var StudentExamAnswers = new List<KeyValuePair<int, string>>();
            string ans;
            int t = 0;
            //per each test
            do
            {
                //validation
                do
                {
                    Console.WriteLine("Answer for Question " + (t + 1) + " : ");
                    ans = Console.ReadLine();
                }
                while (ans != "A" && ans != "B" && ans != "C" && ans != "D");
                StudentExamAnswers.Add(new KeyValuePair<int, string>((t + 1), ans));



                t++;
            }
            while (t < 10);

            bool PassOrFail = passFail(CorrectExamAnswers, StudentExamAnswers);

            //NEW LINE
            Console.WriteLine();

            // Displaying passed or failed

            if (PassOrFail)
                Console.WriteLine("PASSED");
            else
                Console.WriteLine("FAILED");

            //NEW LINE
            Console.WriteLine();

            // Display stats graph
            Console.WriteLine("Question     |Answer     |User Input     |Result");
            Console.WriteLine("------------------------------------------------");
            for (int i = 0; i < 10; i++)
            {
                //FORMATTING DIGIT 10
                if (i == 9)
                {
                    Console.WriteLine((i + 1) + "." + "          |" + CorrectExamAnswers[i].Value.ToString() + "          |" + StudentExamAnswers[i].Value.ToString() + "               |" + (CorrectExamAnswers[i].Value.ToString().Trim() == StudentExamAnswers[i].Value.ToString().Trim() ? "Correct" : "Incorrect"));

                }
                else
                {
                    Console.WriteLine((i + 1) + "." + "           |" + CorrectExamAnswers[i].Value.ToString() + "          |" + StudentExamAnswers[i].Value.ToString() + "               |" + (CorrectExamAnswers[i].Value.ToString().Trim() == StudentExamAnswers[i].Value.ToString().Trim() ? "Correct" : "Incorrect"));
                }
            }

            Console.WriteLine("Total number of correct answers: " + GetTotalNumberOfCorrectAnswers(CorrectExamAnswers, StudentExamAnswers));
            Console.WriteLine("Total number of incorrect answers: " + (10 - GetTotalNumberOfCorrectAnswers(CorrectExamAnswers, StudentExamAnswers)));
            Console.WriteLine("Enter MAIN MENU choice");
        }


        //helper functions


        static int TotalRainfallForTheYear(List<KeyValuePair<int, int>> rainPerMonth)
        {
            int totalRainfallForTheYear = 0;

            for (int i = 0; i < rainPerMonth.Count; i++)
            {
                totalRainfallForTheYear = totalRainfallForTheYear + rainPerMonth[i].Value;
            }
            return totalRainfallForTheYear;
        }

        static double AverageMonthlyRainfall(List<KeyValuePair<int, int>> rainPerMonth)
        {
            int totalRainfallForTheYear = 0;
            double averageMonthlyrainfall = 0.0;


            totalRainfallForTheYear = TotalRainfallForTheYear(rainPerMonth);
            averageMonthlyrainfall = totalRainfallForTheYear / 12;


            return averageMonthlyrainfall;
        }

        static int[] HighestMonthAndLowest(List<KeyValuePair<int, int>> rainPerMonth)
        {
            int[] highestLowest = new int[2];

            string highestMonth = "";
            string lowestMonth = "";


            int maxmonth = Convert.ToInt32(rainPerMonth.Max(y => y.Value));
            int minmonth = Convert.ToInt32(rainPerMonth.Min(y => y.Value));


            highestLowest[0] = maxmonth;
            highestLowest[1] = minmonth;

            return highestLowest;
        }

        private static bool IsValid(int[] validchargeaccnumbers, int userInput)
        {
            bool isValid = false;

            for (int i = 0; i < validchargeaccnumbers.Length; i++)
            {
                if (validchargeaccnumbers[i] == userInput)
                {
                    isValid = true;
                    break;
                }
            }

            return isValid;
        }

        private static void displayWages(double[] wges, int[] employeeids, int empIndex)
        {
            Console.WriteLine("Employee Identification Number: " + employeeids[empIndex] + "- Gross Wage: " + wges[empIndex]);
        }

        private static bool passFail(List<KeyValuePair<int, string>> correctAnswers, List<KeyValuePair<int, string>> stuAns)
        {
            bool pass = false;
            int passFailcounter = 0; // 6 out of 10 should match

            for (int i = 0; i < 10; i++)
            {
                if (correctAnswers[i].Value == stuAns[i].Value)
                {
                    passFailcounter = passFailcounter + 1;
                }
            }

            if (passFailcounter >= 6)
                pass = true;
            else
                pass = false;

            return pass;
        }

        private static int GetTotalNumberOfCorrectAnswers(List<KeyValuePair<int, string>> correctAnswers, List<KeyValuePair<int, string>> stuAns)
        {
            bool pass = false;
            int passFailcounter = 0; // 6 out of 10 should match

            for (int i = 0; i < 10; i++)
            {
                if (correctAnswers[i].Value == stuAns[i].Value)
                {
                    passFailcounter = passFailcounter + 1;
                }
            }

            return passFailcounter;
        }



    }
}