This was the first question and first program homework for C#. No background in code. Trying to wrap my head around privative variables, class, using constructors, and instantiating an object was not easy. I hope my struggles with using get and set in C# can help someone else.
“4.16 (Computerization of Health Records) A health care issue that has been in the news lately is the computerization of health records. This possibility is being approached cautiously because of sensitive privacy and security concerns, among others. [We address such concerns in later exercises.] Computerizing health records could make it easier for patients to share their health profiles and his- tories among their various health care professionals. This could improve the quality of health care, help avoid drug conflicts and erroneous drug prescriptions, reduce costs and, in emergencies, could save lives. In this exercise, you’ll design a “starter” HealthProfile class for a person. The class attri- butes should include the person’s first name, last name, gender, date of birth (consisting of separate attributes for the month, day and year of birth), height (in inches) and weight (in pounds). Your class should have a constructor that receives this data. For each attribute provide a property with set and get accessors. The class also should include methods that calculate and return the user’s age in years, maximum heart rate and target-heart-rate range (see Exercise 4.15), and body mass index (BMI; see Exercise 3.31). Write an app that prompts for the person’s information, instantiates an object of class HealthProfile for that person and displays the information from that object—including the person’s first name, last name, gender, date of birth, height and weight—then calculates and dis- plays the person’s age in years, BMI, maximum heart rate and target-heart-rate range. It should also display the “BMI values” chart from Exercise 3.31.
”
After some struggle, I was finally able to manually go through each requirement and build out the program; however, there is a much simpler way to do a getter and setter. Shown below, each one of the get/set functions requires a verbose amount of code which is only required for performing data validation. For example, if one needs to check if each variable needs to meet certain parameters, the verbose get/set option should be used. When each get set does NOT need to be validated, the simple way to approach it is via a single line get/set, for example:
Manual Get and Set With Data Validation:
private int month;
public int Month
{
get
{
return month;
}
set
{
if((value>=1)&&(value,=12))
month = value;
}
}
Manual Get and Set Without Data Validation:
private int month;
public int Month {get; set;}Important distinction. Consider the time saved. The first solution with a manual get/set enabled. Updating the code to use a simpler form of get and set would be wise. Here it is though, the first working program to get over the wall covering Objects, Classes, Methods, Instance Variables, Constructors, Instantiation, and Getters and Setters:
using System;
public class HealthProfile
{
//declare all of the instance variables
string _firstName;
string _lastName;
//string _dateOfBirthComplete;
int _dayOfBirth;
int _monthOfBirth;
int _yearOfBirth;
int _weightInPounds;
int _heightInInches;
string _gender;
//constructor to initalize all the variables
public HealthProfile(string FirstName, string LastName, int DayOfBirth, int MonthOfBirth, int YearOfBirth, int WeightInPounds, int HeightInInches, string Gender)
{
this._firstName = FirstName;
this._lastName = LastName;
this._dayOfBirth = DayOfBirth;
this._monthOfBirth = MonthOfBirth;
this._yearOfBirth = YearOfBirth;
this._weightInPounds = WeightInPounds;
this._heightInInches = HeightInInches;
this._gender = Gender;
} // end constructor for HealthProfile
//set and get _dayOfBirth
public int DayOfBirth
{
get
{
return _dayOfBirth;
}
set
{
this._dayOfBirth = value;
}
}
public void DisplayDayOfBirth()
{
Console.WriteLine("Day of Birth: {0}", DayOfBirth);
}
//set and get _monthOfBirth
public int MonthOfBirth
{
get
{
return _monthOfBirth;
}
set
{
this._monthOfBirth = value;
}
}
public void DisplayMonthOfBirth()
{
Console.WriteLine("Month of Birth: {0}", MonthOfBirth);
}
//set and get _yearOfBirth
public int YearOfBirth
{
get
{
return _yearOfBirth;
}
set
{
this._yearOfBirth = value;
}
}
public void DisplayYearOfBirth()
{
Console.WriteLine("Year of Birth: {0}", YearOfBirth);
}
// set and get _firstName
public string FirstName
{
get
{
return _firstName;
}
set
{
_firstName = value;
}
}
//method to display the FirstName
public void DisplayFirstName()
{
Console.WriteLine("First Name: {0}", FirstName);
}
//set and get last name
public string LastName
{
get
{
return _lastName;
}
set
{
this._lastName = value;
}
}
public void DisplayLastName()
{
Console.WriteLine("Last Name: {0}", LastName);
}
//set and get weight in pounds
public int WeightInPounds
{
get
{
return _weightInPounds;
}
set
{
this._weightInPounds = value;
}
}
public void DisplayWeightInPounds()
{
Console.WriteLine("Weight in pounds: {0}", WeightInPounds);
}
//set and get height in inches
public int HeightInInches
{
get
{
return _heightInInches;
}
set
{
this._heightInInches = value;
}
}
public void DisplayHeightInInches()
{
Console.WriteLine("Height in inches: {0}", HeightInInches);
}
//set and get gender
public string Gender
{
get
{
return _gender;
}
set
{
this._gender = value;
}
}
public void DisplayGender()
{
Console.WriteLine("Gender is: {0}", Gender);
}
//create a method that calculates the BMI
public float BodyMassIndex()
{
float BMI = (WeightInPounds * 703) / (HeightInInches * HeightInInches);
return BMI;
}
public void DisplayBodyMassIndex()
{
Console.WriteLine("Body Mass Index: {0}", BodyMassIndex());
}
public void DisplayBMIOutput()
{
//Perform IF, ELSE IF statements to provide the weight category
if (BodyMassIndex() < 18.5)
{
Console.Write("\nYou are Underweight.\n");
}//end if
else if (BodyMassIndex() < 25)
{
Console.Write("\nYou weight is Normal.\n");
}//end else if
else if (BodyMassIndex() < 30)
{
Console.Write("\nYou are Overweight\n");
}//end else if
else Console.Write("\nYou are Obese.\n");
}
public void DisplayBMIChart()
{
Console.Write("\n\n\nBMI Values\n\nUnderweight: less than 18.5\nNormal: between 18.5 and 24.9\nOverweight: between 25 and 29.9\nObese: 30 or greater\n");
}
//create method to calculate age
public int YearsOfAgeSimple()
{
int YearsOfAgeSimple = (2014 - this._yearOfBirth);
return YearsOfAgeSimple;
}
public void DisplayYearsOfAgeSimple()
{
Console.WriteLine("{0} years of age.", YearsOfAgeSimple());
}
//create method to calculate the Max heart rate
public double MaxHeartRate()
{
int MaxHeartRate = (220 - YearsOfAgeSimple());
return MaxHeartRate;
}
public void DisplayMaxHeartRate()
{
Console.WriteLine("Max heart rate: {0}", MaxHeartRate());
}
//create method to calculate the Target heart rate
public double TargetHeartRate()
{
double TargetHeartRate = (.68 * MaxHeartRate()); // assume approx. average of 50 to 85% of max heart rate.
return TargetHeartRate;
}
public void DisplayTargetHeartRate()
{
Console.WriteLine("Target heart rate: {0}", TargetHeartRate());
}
} // end class HealthProfile
//create the program to test out the class
class HealthProfileTest
{
public static void Main(string[] args)
{
HealthProfile hp1 = new HealthProfile(null, null, 0, 0, 0, 0, 0, null);
Console.Write("Enter First Name: ");
hp1.FirstName = Convert.ToString(Console.ReadLine());
Console.Write("Enter Last Name: ");
hp1.LastName = Convert.ToString(Console.ReadLine());
Console.Write("Enter Day of Birth: ");
hp1.DayOfBirth = Convert.ToInt32(Console.ReadLine());
Console.Write("Enter Month of Birth: ");
hp1.MonthOfBirth = Convert.ToInt32(Console.ReadLine());
Console.Write("Enter Year of Birth: ");
hp1.YearOfBirth = Convert.ToInt32(Console.ReadLine());
Console.Write("Enter Weight in pounds: ");
hp1.WeightInPounds = Convert.ToInt32(Console.ReadLine());
Console.Write("Enter Height in inches: ");
hp1.HeightInInches = Convert.ToInt32(Console.ReadLine());
Console.Write("Enter Gender: ");
hp1.Gender = Convert.ToString(Console.ReadLine());
hp1.DisplayFirstName();
hp1.DisplayLastName();
hp1.DisplayDayOfBirth();
hp1.DisplayMonthOfBirth();
hp1.DisplayYearOfBirth();
hp1.DisplayWeightInPounds();
hp1.DisplayHeightInInches();
hp1.DisplayGender();
hp1.DisplayYearsOfAgeSimple();
hp1.DisplayMaxHeartRate();
hp1.DisplayTargetHeartRate();
hp1.DisplayBodyMassIndex();
hp1.DisplayBMIOutput();
hp1.DisplayBMIChart();
}
}
Hope this helps.
