Question

Sorry, I am new to coding and I can’t figure this out after trying everything! I have 6 masked text boxes which the user inputs decibel values, is supposed to save them to a list, input each into a formula and output a summed decibel value, but it is simply taking the variable added as 6, which is the count of the list instead of the actual values. When I tried a foreach loop, it made it an infinite loop.

private void dBAddButton_Click(object sender, EventArgs e)
    {         
        List<double> addDBList = new List<double>();
        double final;
        double added = 0;

        addDBList.Add(double.Parse((dB1.Text)));
        addDBList.Add(double.Parse((dB2.Text)));
        addDBList.Add(double.Parse((dB3.Text)));
        addDBList.Add(double.Parse((dB4.Text)));
        addDBList.Add(double.Parse((dB5.Text)));
        addDBList.Add(double.Parse((dB6.Text))); 

            for (int i = 0; i < addDBList.Count; i++)
           {
            added += Math.Pow(10, (i / 10));
           }

        final = 10 * Math.Log10(added);

        totaldB.Text = final.ToString();                  
    }

}

The formula is basically 10log[10^(first value/10)+10^(second value/10)...+10^(nth value/10)]

Answer 1

added += Math.Pow(10, (i / 10));

This is your problem. i is the index position of the array, not the actual value. You want to use this:

added += Math.Pow(10, (addDBList[i] / 10));