Create a Long Jump Average application in c#

Question

Create a Long Jump Average application to prompt the user for the lengths of four jumps and then display the average jump length. Ask the user for the specific units.

Answer 1

For a console app it would go something like this:

// Create an array to hold jumps, this does not need to be an array,

// it could be separate float variable or a list of floats.

// Using a list of floats would allows for as many entry's as you wish.

// (The for loop would need to become a while)

float[] jumps = new float[4];

// Prompt the users to select the measurement units

Console.WriteLine("Select the type of units your jumps are measured in.");

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

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

char unit='x';

string strUnits = "Feet";

// Use the while loop to capture, validate an assign the measurement string.

// This code could be refactor to be less verbose, but I did this way for

// better understanding of the concept

while (unit == 'x')

{

//Capture the users input using a single key stroke

//Using ReadLine() would allow for more opportunity of invalid data entry

unit = char.ToUpper(Console.ReadKey(true).KeyChar);

// Validate the entry against valid values

if (unit != 'M' && unit != 'F')

{

// if invalid data entered reset the unit variable and continue the loop

unit = 'x';

continue;

}

// if a valid entry was supplied update the strUnit variable for displaying

switch (unit)

{

case 'F':

strUnits = "Feet";

break;

case 'M' :

strUnits = "Meters";

break;

}

}

// Use the for loop to capture the number of jumps based on the arrays length

// If you convert this to a list of floats you will need to use the while loop instead

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

{

while (jumps[i] == 0.00f){

//Prompt the user for the current jumps value

Console.WriteLine($"Enter the lentgh of jump #{i}");

// Use floats tryparse extension method to validate the entry is a valid numeric float

if (!float.TryParse(Console.ReadLine(), out jumps[i]))

{

// If the tryparse fails alert the user and continue the loop from the top

Console.WriteLine($"Invlaid entry! Enter a valid (positive) numeric value for jump #{i+1}");

continue;

}

// If the tryparse passes but the value is not positive, alert the user,

// reset the index value of the jump array to zero and continue the loop from the top

if (jumps[i] < 0.00f){

Console.WriteLine($"Invlaid entry! Enter a valid (positive) numeric value for jump #{i+1}");

jumps[i] = 0.00f;

}

}

}

// Once all jumps have been entered run the arrays average extension method to calculate the average

// You can also manually calculate if you desire

float averageJump = jumps.Average();

// Print the average to the user.

// If you are creating a forms type application

// supply the averageJump variable to the display control.

Console.WriteLine($"You averaged {averageJump} {strUnits} per jump");