去掉字符串中的数字

char* function(char *str)
{
    char *write,*read;
 
    write=read=str;
 
    while(*read!=0)
    {
        if(  !('0'<=*read && *read<='9')  )
        {
            *write++=*read;
        }
 
        ++read;
    }
 
    *write=NULL;
 
    return str;
}

顺带看一下STL 的remove的实现，这里用到了remove_copy

template <class ForwardIterator, class T>
ForwardIterator remove(ForwardIterator  first, ForwardIterator last, const T& value)
{
    first = find(first, last, value);
    ForwardIterator next = first;
    return first == last ? first : remove_copy(++next, last, first, value);
}

tempalate <class InputIterator, class OutIterator, class T>
OutputIterator remove_copy(InputIterator first, InputIterator last, OutputIterator result, const T& value)
{
    for( ; first != last; ++first)
    {
        if(*first != value)
        {
            *result = *first;
            ++result;
        }
    }
    return result;
}