String to float

// Stolen from bo2 I can code better than this but
// i can not be asked to make it.
// Thanks 3ark. I still hate you :) <3
string_to_float( string )
{
    floatparts = strtok( string, "." );
    if ( floatparts.size == 1 )
    {
        return int( floatparts[ 0 ] );
    }
    whole = int( floatparts[ 0 ] );
    decimal = 0;
    i = floatparts[ 1 ].size - 1;
    while ( i >= 0 )
    {
        decimal = ( decimal / 10 ) + ( int( floatparts[ 1 ][ i ] ) / 10 );
        i--;

    }
    if ( whole >= 0 )
    {
        return whole + decimal;
    }
    else
    {
        return whole - decimal;
    }
}