问从打印的asciiArt字符中获取字母

EN

char ScanChar(string art)
{
    // Iterate over each character from A to Z.
    for (char c = 'A'; c <= 'Z'; c++)
    {
        // Check to see if the character corresponds with the ASCII art.
        if (asciiArt.printChar(c) == art)
        {
            // Return the character if it does.
            return c;
        }
    }

    // Optionally use a null character to indicate that the string passed
    // doesn't correspond to any valid ASCII art.
    return (char)0;
}

throw new ArgumentException("The string does not correspond to valid ASCII art.");