3 + *

#include <iostream>
#include <fstream>
#include <iomanip>
#include <stdlib.h>
#include <string>
#include <windows.h>

int counter = 0;

using namespace std;

void sentence(string &line);

int main()
{
    SetConsoleCP(1251);
    SetConsoleOutputCP(1251);

    string a;
    string &line = a;
    fstream F;
    string tmp = "1";
    int freq = 1;

    F.open("File.txt");

    while(!F.eof()){
        if(!F.is_open()){
            cout << "not open";
        }else{
            F >> line;
            sentence(line);
        }
        if(tmp.length() < line.length()){
             tmp = line;
        }
    }

    while(!F.eof()){
        if(!F.is_open()){
            cout << "not open";
        }else{
            F >> line;
            if(line == tmp){
                freq++;
            }
         }
    }

    cout << "\n" << tmp << " " << freq << "\n";

    F.close();
}

void sentence(string &line){
    bool DOT = false;

    for(int i = 0; i < line.length();i++){
        line[i] != '.' ? counter++ : DOT = true;
        line[i] != '!' ?  : DOT = true;
        line[i] != '?' ?  : DOT = true;

         if(DOT == true){
            cout << line << "(" << counter << ")" << " ";
            counter = 0;
         }
    }

    if(DOT == false){
        cout << line << " ";
    }
}