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C# C# Objects Loops and Final Touches For Loops

Posted by William Millington
William Millington
2,440 Points

For loop can't compile due to error CS0019, how can this be rectified?

I am trying to find the average of an array of integers. I feel that my code meets this criteria but I keep being told that it cannot compile due to the += operator won't work on a type int and a type Treehouse.CodeChallenges.Frog.

I have tried everything I can thing of for now but I am a beginner, am I missing something obvious?

Thanks.

FrogStats.cs 
namespace Treehouse.CodeChallenges
{
    class FrogStats
    {
        public static double GetAverageTongueLength(Frog[] frogs)        
        {
            int total = 0;
            double average = 0;

            for(int i = 0; i < frogs.Length; i++)
            {
                 Frog frog = frogs[i];
                 total += frog;
            }

            return average = total/frogs.Length;
        }
    }
}
Frog.cs 
namespace Treehouse.CodeChallenges
{
    public class Frog
    {
        public int TongueLength { get; }

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

1 Answer

Steven Parker
Steven Parker
231,236 Points
Steven Parker
Steven Parker
231,236 Points

You can't add a "frog" to a number. You probably wanted to add the tongue length:

                 total += frog.TongueLength;

And a "return" statement takes an expression but not an assignment:

            return total/frogs.Length;

So you also don't need the "average" variable.

William Millington
William Millington
2,440 Points

Thanks again for your help Steven. Issue resolved with exactly those corrections. I see where I was going wrong now.