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C# C# Objects Loops and Final Touches For Loops

Posted by Roberto Martinez
Roberto Martinez
3,322 Points

Help - Error with Frog/Loop Challenge code

I am getting the following error and I can't figure out why: FrogStats.cs(21,17): error CS0019: Operator +=' cannot be applied to operands of typedouble' and `Treehouse.CodeChallenges.Frog' Compilation failed: 1 error(s), 0 warnings

Code:

namespace Treehouse.CodeChallenges { class FrogStats { private readonly Frog _tongueLength;

    public FrogStats(Frog tongueLength)
    {
        _tongueLength = tongueLength;
    }

    public static double GetAverageTongueLength(Frog[] frogs)
    {
        double sum = 0;
        double tally = 0;
        double average = 0;

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

            i++;
        }

        average = sum / frogs.Length - 1;
        return average;
    }
}

}

FrogStats.cs 
namespace Treehouse.CodeChallenges
{
    class FrogStats
    {
        private readonly Frog _tongueLength;

        public FrogStats(Frog tongueLength)
        {
            _tongueLength = tongueLength;
        }

        public static double GetAverageTongueLength(Frog[] frogs)
        {
            double sum = 0;
            double tally = 0;
            double average = 0;

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

                i++;
            }

            average = sum / frogs.Length-1;
            return average;
        }
    }
}
Frog.cs 
namespace Treehouse.CodeChallenges
{
    public class Frog
    {
        public int TongueLength { get; }

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

2 Answers

Steven Parker
Steven Parker
231,248 Points
Steven Parker
Steven Parker
231,248 Points

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

Also, you have an increment clause in your "for" loop, but also a separate increment statement inside the loop (you probably don't want both). And why would you subtract one from the average?

Roberto Martinez
Roberto Martinez
3,322 Points
Roberto Martinez
Roberto Martinez
3,322 Points

Steven, Thank you! That helped. I figured it out.