Programming Assignment 3: C# Solutions, Code, and Documentation

This document presents the solutions for Assignment 3, focusing on C# programming concepts. The assignment covers four distinct problems. Problem 1 involves determining whether numbers from 0 to 9 are even or odd. Problem 2 simulates a bill payment scenario, prompting the user to enter denominations until the bill is fully paid. Problem 3 utilizes a 2D array to perform operations such as displaying the array elements, calculating the sum of all elements, and computing the product of each row. Problem 4 utilizes a jagged array, displaying the array elements, calculating the sum of all elements, and calculating and displaying the product of each subarray (row) and the sum of the products. Each solution includes documented C# code demonstrating the implementation of these concepts.

Documentation
Problem 1:
Coding:
/*
* The task of the assignment is to determine whether number 0 through 9
* is even or odd
*/
using System;
namespace Assignment_3_Problem_1_solution
{
class Program
{
static void Main(string[] args)
{
// loop for X from 0 through 9
for (int X = 0; X <= 9; X++)
{
// check if the number is even
if (X % 2 == 0)
{
// display number is even
Console.WriteLine("Value " + X + " is an even number");
}
else
{
// display number is odd
Console.WriteLine("Value " + X + " is an odd number");
}
}
Console.ReadKey();
}
}
}
Output:

Problem 2:
Coding:
/*
* The task of the assignment is to receive amount from the user until they pay
the bill they owed
*/
using System;
namespace Assignment_3_Problem_2_solution
{
class Program
{
static void Main(string[] args)
{
int BillAmount = 0;
// loop until a valid total bill amount is entered
while (BillAmount <= 0)
{
// prompt and get the bill amount
Console.Write("Enter the total due in whole dollars: ");
int.TryParse(Console.ReadLine(), out BillAmount);
}
int IllegalAttempCount = 0;
double RemainingAmount = BillAmount;
// loop until they user pays the full bill amount
while (RemainingAmount > 0)
{
// prompt and get the denomination
Console.Write(String.Format("I need {0:C} dollars: Enter a 50,
20, 10, 5 or 1: ", RemainingAmount));
String Denomination = Console.ReadLine();
// switch based on the denominatoion
switch (Denomination)
{
case "50":
RemainingAmount -= 50;
break;
case "20":
RemainingAmount -= 20;
break;
case "10":
RemainingAmount -= 10;
break;
case "5":
RemainingAmount -= 5;
break;
case "1":
RemainingAmount -= 1;
break;
default:
// increment illegal attemt count by 1
IllegalAttempCount++;

// display amount is illegal denomination
Console.WriteLine("Illegal Denomination");
// if the illegal count is 2
if (IllegalAttempCount == 2)
{
// call the police and exit the application
Console.WriteLine("call the police");
System.Environment.Exit(1);
}
break;
}
}
// if the remaining amount is 0
if (RemainingAmount == 0)
{
// display thanking message
Console.WriteLine("Thanks for nothing");
}
else
{
// display thanking message for tip
Console.WriteLine("Thanks for the {0:C} tip!!", (-
1*RemainingAmount));
}
Console.ReadKey();
}
}
}
Output:

Problem 3:
Coding:
using System;
namespace Assignment_3_Problem_3_solution
{
class Program
{
static void Main(string[] args)
{
// initialize 2D array
int[,] DataArray = { { 5, 1 }, { 3, -1 }, { -4, -3 }};
Console.WriteLine("The array contains:");
int DataCount = 1;
// loop through each element in the array
foreach (int Data in DataArray)
{
// check if the current value is last element in the row
if (DataCount % DataArray.GetLength(1) == 0)
{
// print data with new line
Console.WriteLine(String.Format("{0,3}", Data));
}
else
{
// print data with space
Console.Write(String.Format("{0,3} ", Data));
}
// increment number of data by 1
DataCount++;
}
int Sum = 0;
// loop through each element in the array
foreach (int Data in DataArray)
{
// increment sum by data
Sum += Data;
}
// display sum of array elements
Console.WriteLine("\nThe sum of the array elements is " + Sum);
Console.WriteLine();
int RowCount = 0;
DataCount = 1;
int Product = 1;
// loop for each element in the array
foreach (int Data in DataArray)
{
// multipley data with Product
Product *= Data;

// check if the current value is last element in row
if (DataCount % DataArray.GetLength(1) == 0)
{
// display the product value
Console.WriteLine("The product of line {0} is {1}", RowCount,
Product);
// increment row count by 1
RowCount++;
// reinitialize product to 1
Product = 1;
}
// increment number of data by 1
DataCount++;
}
Console.ReadKey();
}
}
}
Output:
Problem 4:
Coding:
using System;
namespace Assignment_3_Problem_4_solution
{
class Program
{
static void Main(string[] args)
{
// initialize jagged array
int[][] DataArray = new int[][]
{
new int[] {1, 3, 20, -1},
new int[] {-1, 7, 2},
new int[] {-3,-4}

};
Console.WriteLine("The array contains:");
// loop through each row in the array
foreach (int[] Row in DataArray)
{
// loop through each element in the row
foreach (int Data in Row)
{
// print data with new line
Console.Write(String.Format("{0,3} ", Data));
}
Console.WriteLine();
}
int Sum = 0;
// loop through each row in the array
foreach (int[] Row in DataArray)
{
// loop through each element in the row
foreach (int Data in Row)
{
// increment sum by data
Sum += Data;
}
}
// display sum of array elements
Console.WriteLine("The sum of the array elements is " + Sum);
Console.WriteLine();
int sumOfProduct = 0;
int RowCount = 0;
// loop through each row in the array
foreach (int[] Row in DataArray)
{
int Product = 1;
// loop through each element in the row
foreach (int Data in Row)
{
// multiply data with Product
Product *= Data;
}
// display the product value
Console.WriteLine("Subarray product of Row {0} is {1}", RowCount,
Product);
// increment row count by 1
RowCount++;
// increment sumOfProduct by product value
sumOfProduct += Product;
}

// display sum of product
Console.WriteLine("\nSum of the Products is {0}", sumOfProduct);
Console.ReadKey();
}
}
}
Output: