строки

#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main()
{
        ifstream fin("D:\\555.txt");//адресс к текстовому файлу
        string str;
        int i = 0;//обнуляем счетчик
        while ( fin >> str )
                if ( str.size() <=5 ) 
                        ++i;
        fin.close();
        cout << "V texte " <<i<< " slov, sostoyaschih ne bolee chem iz 5 bukv." << endl;
        system("pause");
        return 0;
}

#include <iostream>
using namespace std;
 
int main ()
{
    char str [] = {"Create hyperlinks by dragging and dropping. Add graphics and multimedia elements in seconds. Make screenshots of your application with the integrated screenshot tool and enhance them quickly with the screenshot editing program. Compile your project to any supported output format with a couple of clicks. Work in collaboration with a team of authors all editing the same project at the same time. Produce help and documentation faster and more efficiently and have fun in the process!"};
    int start = 0, end = 0, count = 0;
    int i = 0;
    while ( str[i] != '\0')
    {
        if(str[i]==' ' || str[i]==',' || str[i]=='.' || str[i]=='?' || str[i]=='!' || str[i]=='\0')
        {
            end = i;
            if ((end - start) < 5)
            {
                ++count;
            }
            
            if (str[end]==',' || str[end]=='.' || str[end]=='?' || str[end]=='!')
            {
                start=end+2;
                ++i;
            }
            if (str[end]==' ')
            {
                start=end+1;
            }
        }
        ++i;
    }
 
    cout << "Kolichestvo slov, dlina kotoryh menee 5 simvolov: " << count << " \n";
    
    return 0;
}