no overload for method 'METHOD' takes 0 arguments

Question

I have 3 methods.

1 method holding the value of 3000 1 method holding the value of 0.13

and I have created another method that I want to multiply these two figures together.

public override int FishPerTank()
{                
    return 3000;                
}

public override double WeightOut(double weightOut, double weightIn)
{
    return 0.13;
}

public override int HowMuchTheFishWeighOutKG()
{
    return (FishPerTank() * WeightOut());
}

I am receiving the syntax error on the WeightOut here:

public override int HowMuchTheFishWeighOutKG()
{
    return (FishPerTank() * WeightOut());
}

Answer 1

WeightOut expect 2 parameters and you're not providing them

Answer 2

WeightOut(double weightOut, double weightIn) is declared with two parameters and you're calling it with none. Hence the error.