[Brad]

char_to_num(chNum)
{
    new iNum;
    switch(chNum)
    {
        case '0':        iNum = 0;
        case '1':        iNum = 1;
        case '2':        iNum = 2;
        case '3':        iNum = 3;
        case '4':        iNum = 4;
        case '5':        iNum = 5;
        case '6':        iNum = 6;
        case '7':        iNum = 7;
        case '8':        iNum = 8;
        case '9':        iNum = 9;
    }
    
    return iNum;
}

Why didn't you just use str_to_num()?

num_to_char(iNum)
{
    new chNum;
    switch(iNum)
    {
        case 0:        chNum = '0';
        case 1:        chNum = '1';
        case 2:        chNum = '2';
        case 3:        chNum = '3';
        case 4:        chNum = '4';
        case 5:        chNum = '5';
        case 6:        chNum = '6';
        case 7:        chNum = '7';
        case 8:        chNum = '8';
        case 9:        chNum = '9';
    }
    
    return chNum;
}

Why didn't you just use num_to_str()?