求设计一个数据文件处理程序，文件中读取字符串生成单词或数据的文件

#include <iostream>
#include <cctype>
#include <algorithm>
#include <functional>
using namespace std;

int main( void )
{
    const string s = "asjjk 12rtr 345 dasdd9&k32*dfasfkjk##dasfdf897";
   

    for( auto itor=cbegin(s); itor!=cend(s); )
    {
        bool is_digit = isdigit(*itor);
        bool is_alpha = isalpha(*itor);

        if( is_digit || is_alpha )
        {
            cout << (is_digit ? "DIGIT: " : "ALPHA: ");
            auto itor_end = std::find_if( itor, end(s), is_digit ? not_fn(::isdigit) : not_fn(::isalpha) );
            cout.write(&*itor,distance(itor,itor_end)) << '\n';
            itor = itor_end;
        }
        else
        {
            itor = std::find_if( itor, end(s), ::isalnum );
        }
    }
}