interceptInput() function

int Game::interceptInput(int a_lineNum, int a_lineDrawPoint, const int a_maxDigits, char a_validChars[], int a_validCharLength, eInput a_inputType, int a_minRange, int a_maxRange) {
    bool validEntry = false;
    int digitCount = 0;
    int validCharSum = 0;

    //Capture all incoming key-presses until something valid has been entered
    while (!validEntry) {
        if (_kbhit()) {
            char ch = _getch();

            //If pressed key is a valid key print it out
            for (int i = 0; i < a_validCharLength; i++) {
                if (ch != a_validChars[i]) continue;
                else if (ch == a_validChars[i] && digitCount < a_maxDigits) {
                    DrawChar((a_lineDrawPoint + 1) + digitCount, a_lineNum + 1, ch, CYAN);
                    //Add up appropriately for a number
                    if (a_inputType == NUM || a_inputType == NUM_RANGE) {
                        validCharSum *= 10; //Prepare it for the appropriate value
                        validCharSum += (ch - '0'); //Add the value inside of the char instead of the ASCII code
                    //Add up to get single character
                    } else {
                        validCharSum += ch;
                    }
                    digitCount++;
                }
            }

            //Valid entry is finished, user has hit enter. Now check if its within the appropriate range.
            if (ch == 0x0D && digitCount > 0) {
                //If we want to check if number input is in a valid range
                if (a_inputType == NUM_RANGE) {
                    if (validCharSum >= a_minRange && validCharSum < a_maxRange) {
                        DrawTextLine(1, a_lineNum, GREEN, "SUCCESS            ", 100);
                        return validCharSum;
                    }
                    else {
                        DrawTextLine(1, a_lineNum, RED, "NUMBER OUT OF RANGE", 100);
                        digitCount = 0;
                        validCharSum = 0;
                        for (int i = 0; i < a_maxDigits; i++)
                            DrawTextLine((a_lineDrawPoint + i), a_lineNum + 1, WHITE, "\t", 1); // \t gives empty space
                        continue;
                    }
                }
                return validCharSum;
            }

            //Player has made a mistake, clear space proportionate to max digits
            if (ch == 0x08) {
                for (int i = 0; i < a_maxDigits; i++)
                    DrawTextLine((a_lineDrawPoint + i), a_lineNum + 1, WHITE, "\t", 1); // \t gives empty space
                validCharSum = 0;
                digitCount = 0;
            }
        }
    }
    return 0; //All code paths now return a value
}