Getting index out of bound error even though it isn't

I am getting this error:
IndexOutOfRangeException: Index was outside the bounds of the array.
GenerateDice.Roll () (at Assets/scripts/GenerateDice.cs:64)


I do not understand why I am getting that error. If the element at choices[0] is 1 for example, it gives me an out of bounds error even though textboxes[] is size 6.

 

choices

is a string, which means

choices[i]

is a char; i.e. a letter. In C#, a char is a 16-bit number that expresses a unicode code point in utf-16 format.

When you try to use that char as an array index, it is implicitly converted from a char to an int. This implicit conversion preserves the numerical value of the code point. For example, a character of '1' is represented by the numerical value 49.

(This might seem byzantine, but think about what would happen if the character you tried to convert were 'a' or '=' or '¢' rather than being a digit.)

If you want to reinterpret a string as a number in the way that a human would read it when seeing it as text, you should generally use something like int.TryParse. (Although in the special case where you know that it's a single character in the range of '0' to '9', you could also cast it to an integer and subtract 48. This is simpler and faster, but more brittle.)

 

so the code would look something like this?

Code (CSharp):

1. textbox[(int)Char.GetNumericValue('choice[i]')]

 

so the code would look something like this?

Code (CSharp):

1. textbox[(int)Char.GetNumericValue('choice[i]')]

 

Int32.TryParse will tell you if there's number in your string and return that number if it is there

 

If you remove the quotes, then I believe that will work. (Keeping in mind that if the character isn't a digit, GetNumericValue will return -1 and cause an array-out-of-bounds exception.)