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C# C# Objects Loops and Final Touches For Loops

Rasmus Flomén
Rasmus Flomén
3,193 Points
Posted by Rasmus Flomén
Rasmus Flomén
3,193 Points

Help!! code callenge "Return the average length of the tongues of the frogs in the array. Use a for loop as part of you"

I don't relly know Whats wrong! added error masseg in the FrogStats

FrogStats.cs 
namespace Treehouse.CodeChallenges
{
    class FrogStats
    {
        public static double GetAverageTongueLength(Frog[] frogs)
        {
          int AverageTongueLength = 0;
          for(int i = 0; i < frogs.Length; i++){
                 Frog frog = frogs[i];
                 if(frog.TongueLength = null){
                    AverageTongueLength += 0;    
                 }

                 AverageTongueLength += frog.TongueLength;
          }
        }
    }
}

/* error masseg
FrogStats.cs(10,26): error CS0200: Property or indexer `Treehouse.CodeChallenges.Frog.TongueLength' cannot be assigned to (it is read-only)
Compilation failed: 1 error(s), 0 warnings*/
Frog.cs 
namespace Treehouse.CodeChallenges
{
    public class Frog
    {
        public int TongueLength { get; }

        public Frog(int tongueLength)
        {
            TongueLength = tongueLength;
        }
    }
}

3 Answers

Jennifer Nordell
seal-mask
STAFF
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher
Jennifer Nordell
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher

I posted a solution and explanation of this challenge just a day or two ago. Take a look (you might have to scroll down a bit). Hope this helps! :smiley:

https://teamtreehouse.com/community/flat-out-lost

edited for additional note

The reason you're getting a compiler error is this line: 

if(frog.TongueLength = null){

You need a double equals sign there. The way you have it is an assignment, not a comparison.

Yi Chiang
Yi Chiang
11,738 Points
Yi Chiang
Yi Chiang
11,738 Points

You can try use double instead of int. It is asking about average. it might try to add total length in array and divided it by array length.

namespace Treehouse.CodeChallenges
{
    class FrogStats
    {
        public static double GetAverageTongueLength(Frog[] frogs)
        {
            double total=0;
            for(int i=0;i<frogs.Length;i++)
            {
                total+=frogs[i].TongueLength;
            }
            return total/frogs.Length;
        }
    }
}
Brooke Neace
Brooke Neace
11,715 Points

I like this answer the best, and is close to what I came up with. The only thing I don't understand is where the .TongueLength; comes from. Can you elaborate on why that is needed? My compiler doesn't work without it and says the double cannot use the += operator but when I add .TongueLength it works, I don't fully understand why it's needed other than it works. Thanks.

Unsubscribed User
Unsubscribed User
2,446 Points

{ total+=frogs[i].TongueLength; } return total/frogs.Length;

Could you explain these lines of code to me? I'm having trouble comprehending the syntax.

Elfar Oliver
Elfar Oliver
3,924 Points
Elfar Oliver
Elfar Oliver
3,924 Points

How do you come up with this? Do you remember every rule?

Rasmus Flomén
Rasmus Flomén
3,193 Points
Rasmus Flomén
Rasmus Flomén
3,193 Points

Thank you Jennifer! :)

Yes ther is some typos "==" , "AverageTongueLength" can't de a "int" and i forgot the return statment and I misse one "}" :p