10_26_cw

#include <iostream>
#include <fstream>
#include <string>

using namespace std;

void read_by_char(string filename) {
    ifstream fin;
    fin.open(filename);
    if (fin.is_open()) {
        char ch;
        while (!fin.eof()) {
            ch = NULL;
            fin.get(ch);
            cout << ch;
        }
        fin.close();
    }
    else {
        cout << "Can not open the file\n";
    }
}

void read_by_line(string filename) {
    ifstream fin;
    fin.open(filename);
    if (fin.is_open()) {
        string str;
        while (!fin.eof()) {
            str = "";
            getline(fin, str);
            //fin.getline(); это не удобно использовать
            cout << str;
        }
        fin.close();
    }
    else {
        cout << "Can not open the file\n";
    }
}

void write_to_file(string filename) {
    ofstream fout;
    fout.open(filename);
    if (fout.is_open()) {
        int x = 0;
        while (x <= 10)
            fout << x++ << " ";
        fout.close();
        cout << "File ready\n";
    } else {
        cout << "Error with the file\n";
    }
}

void read_from_file(string filename) {
    ifstream fin;
    fin.open(filename);
    if (fin.is_open()) {
        string x;
        int res = 0;
        while (!fin.eof()) {
            fin >> x;
            if((x[0] > '0') && (x[0] < '9'))
                res += stoi(x);
        }
        fin.close();
        cout << "File ready\n" << "Res: " << res << endl;
    }
    else {
        cout << "Error with the file\n";
    }
}



void main() {
    setlocale(LC_ALL, "Russian");
    read_from_file("out.txt");
    //write_to_file("out.txt");


    /*string filename = "my_file.txt";
    //read_by_char(filename);
    string filename2 = "x64/Release/my_file_for_write1.txt";
    ofstream fout;  // cout
    fout.open(filename2, ios_base::app);
    int x = 14;
    if (fout.is_open()) {
        fout << "Hello all\n Кирилица Это Была" << endl;
        fout << x << endl;
        fout.close();
    }
    else {
        cout << "Error with the file\n";
    }

    */
}