lab$$$

// LabProgramming4.0.cpp : Этот файл содержит функцию "main". Здесь начинается и заканчивается выполнение программы.
//

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <fstream>
#include <cstring>
#include <ctime>
#include <cctype>
#include <limits>
#include <stdio.h>

using namespace std;

const int N = 1001;
void cleaning(); //очищение
void Stringlength(char* str); //длина строки
void CopyStr(char* str1, char* str2); //копирование строк
void BondStr(char* str1, char* str2); //склеивание строк
void DelSpace(char* str1, char* str2); //удаление пробелов из строки
void CompStr(char* str1, char* str2); //символьное сравнение строк
int Polindrom(char* str1); //полиндром
void LowReg(char* str); //замена регистра символов
void DelSpace2(char* str1, char* str2); //удаление пробелов для 8 задания
void DelPun(char* str1); //удаление знаков препинания
void Count(char* str1);

int main()
{
    int choice;
    cout << "Enter task number (from 1 to 10), or enter 0 to exit: "; cin >> choice;

    if (choice == 1) //Task 1
    {
        char a[100][100], b[100][100], c[100][100], d[100][100];
        char str[100];
        srand(time(NULL));

        fstream f("file.txt", ios::in);
        int i = 0;

        while (f >> str)
        {
            strcpy_s(a[i], str); i++;
        }
        int na = i;
        for (i = 0; i < na; i++)
        {
            cout << a[i] << endl;
        }
        cout << endl;

        fstream g("file1.txt", ios::in);
        i = 0;

        while (g >> str)
        {
            strcpy_s(b[i], str); i++;
        }
        int nb = i;
        for (i = 0; i < nb; i++)
        {
            cout << b[i] << endl;
        }
        cout << endl;

        fstream h("file2.txt", ios::in);
        i = 0;

        while (h >> str)
        {
            strcpy_s(c[i], str); i++;
        }
        int nc = i;
        for (i = 0; i < nc; i++)
        {
            cout << c[i] << endl;
        }
        cout << endl;

        fstream p("file3.txt", ios::in);
        i = 0;

        while (p >> str)
        {
            strcpy_s(d[i], str); i++;
        }
        int nd = i;
        for (i = 0; i < nd; i++)
        {
            cout << d[i] << endl;
        }
        cout << endl;


        int ka = rand() % na; //заголовок
        cout << a[ka] << " ";

        int kb = rand() % nb; //существительные
        cout << b[kb] << " ";

        int kc = rand() % nc; //глаголы
        cout << c[kc] << " ";

        int kd = rand() % nd; //предлоги
        cout << d[kd] << " ";

        ka = rand() % na; //заголовок
        cout << a[ka] << " ";

        kb = rand() % nb; //существительные
        cout << b[kb] << " ";

        cout << endl;
    }

    if (choice == 2) // Task 2
    {
        int n;
        cout << "Enter the size of the sequence: "; cin >> n;
        n += 1;
        cleaning();
        char* arr1 = new char[n];
        char* arr2 = new char[n];
        char* arr3 = new char[n];
        char* arr4 = new char[n];
        char* arr5 = new char[n];

        cout << "Enter more than 4 digits: "; cin.getline(arr1, 100);
        int z = strlen(arr1);
        if (z >= 4) {
            int string = z / 4, string1 = string, string2 = string, cons = 0, a, b, c, d;
            for (int i = 0; i < string; i++) { arr2[i] = arr1[i]; }
            string += string1;
            for (int i = string1; i < string; i++) { arr3[cons] = arr1[i]; cons++; }
            string += string1;
            string2 += string1;
            cons = 0;
            for (int i = string2; i < string; i++) { arr4[cons] = arr1[i]; cons++; }
            cons = 0;
            string2 += string1;
            for (int i = string2; i < z; i++) { arr5[cons] = arr1[i]; cons++; }
            a = atoi(arr2); b = atoi(arr3); c = atoi(arr4); d = atoi(arr5);
            cout << a << " " << b << " " << c << " " << d << endl;
            if (a == b) cout << "Your answer: 1\n"; if (c == d) cout << "Your answer: 1\n";
            cout << "Your answers: \n";
            if (a < b) cout << a << "/" << b << endl;
            if (a > b) cout << b << "/" << a << endl;
            if (c < d) cout << c << "/" << d << endl;
            if (c > d) cout << d << "/" << c << endl;

        }
        else { cout << "Error, less than 4 numbers were entered (x_x)"; return 0; }
            delete[]arr1;
            delete[]arr2;
            delete[]arr3;
            delete[]arr4;
            delete[]arr5;
    }
    if (choice == 3) // Task 3
    {
        int n;
        cout << "Enter the length of the string: "; cin >> n; n += 1;
        char* str = new char[n];
        cleaning();
        cout << "Enter your string: "; cin.getline(str, n); cout << "Your string: " << str << endl;
        Stringlength(str);
            delete[]str;
    }
    if (choice == 4) // Task 4
    {
        int n;
        cout << "Enter the length of the string: "; cin >> n; n += 1;
        char* str1 = new char[n];
        char* str2 = new char[n];
        cleaning();
        cout << "Enter your first string: "; cin.getline(str1, n);
        cout << endl;
        CopyStr(str1, str2);
        cout << "First string: " << str1 << endl;
        cout << "Second string: " << str2 << endl;
            delete[]str1;
            delete[]str2;
    }
    if (choice == 5) // Task 5
    {
        int n;
        cout << "Enter the length of the string: "; cin >> n; n += 1;
        char* str1 = new char[n];
        char* str2 = new char[n];
        cleaning();
        cout << "Enter first string: "; cin.getline(str1, n);
        cout << "Enter second string: "; cin.getline(str2, n);
        BondStr(str1, str2);
            delete[]str1;
            delete[]str2;
    }
    if (choice == 6) // Task 6
    {
        int n, cons = 0;
        cout << "Enter the length of the string: "; cin >> n; n += 1;
        char* str1 = new char[n];
        char* str2 = new char[n];
        cleaning();
        cout << "Enter string: "; cin.getline(str1, n);
        cout << endl;
    //  cout << "Original string: " << str1 << endl;
        DelSpace(str1, str2);
        cout << endl;
        cout << "Original string: " << str2 << endl;
            delete[]str1;
            delete[]str2;
    }
    if (choice == 7) // Task 7
    {
        int n;
        cout << "Enter the length of the string: "; cin >> n; n += 1;
        char* str1 = new char[n];
        char* str2 = new char[n];
        cleaning();
        cout << "Enter first string: "; cin.getline(str1, n);
        cout << "Enter second string: "; cin.getline(str2, n);
        CompStr(str1, str2);
            delete[]str1;
            delete[]str2;
    }
    if (choice == 8) // Task 8
    {
        int n;
        cout << "Enter the length of the string: "; cin >> n; n += 1;
        char* str1 = new char[n];
        char* str2 = new char[n];
        cleaning();
        cout << "Enter string: "; cin.getline(str1, n);
        LowReg(str1);
        DelPun(str1);
        DelSpace2(str1, str2);
        cout << endl;
        if (Polindrom(str1) == 1) cout << "Answer: 1 --> This is polindrom";
        else cout << "Answer: 0 --> This is not polindrom";

        delete[]str1;
        delete[]str2;

    }
    if (choice == 9) // Task 9
    {
        FILE* simpletext;
        char* str1 = new char[N];
        int cons, z = 0;
        simpletext = fopen("9_task.txt", "rb");

        if (simpletext != NULL)
        {
            cons = fread(str1, 1, N, simpletext);
            cout << "Number symbols in file: " << cons << endl;
            Count(str1);
        }
        else cout << "#Error# File not found" << endl;

        delete[]str1;
        return 0;
    }
    if (choice == 10) // Task 10
    {

    }
}

void cleaning()
{
    cin.clear();
    while (cin.get() != '\n');
}

void Stringlength(char* str)
{
    int cons = 0;
    while (str[cons] != '\0') cons++;
    cout << "String length: " << cons << endl;
}

void CopyStr(char* str1, char* str2)
{
    int cons = 0;
    while (str1[cons] != '\0') { str2[cons] = str1[cons]; cons++; }
    str2[cons] = '\0';
}

void BondStr(char* str1, char* str2)
{
    int cons = 0, cons1 = 0;
    while (str1[cons] != '\0') cons++;
    cout << "First string length: " << cons << endl;
    str1[cons++] = ' ';
    while (str2[cons1] != '\0') { str1[cons + cons1] = str2[cons1]; cons1++; }
    str1[cons + cons1] = '\0';
    cout << "Second string length: " << cons1 << endl;
    cout << "Result: " << str1 << endl;
}

void DelSpace(char* str1, char* str2)
{
    int cons = 0;
    str2 = strtok(str1, " "); //поиск лексем
    cout << "Result: ";
    while (str2 != NULL)
    {
        cout << str2;
        str2 = strtok(NULL, " ");
        cons++;
    }
    cout << endl;
    cout << "Numbers of spaces: " << cons - 1;
}

void CompStr(char* str1, char* str2)
{
    int cons = 0;
    while (str1[cons] != '\0' && str2[cons] != '\0') cons++;
    if (str1[cons] == '\0' && str2[cons] == '\0') cout << "Answer: 0 --> Strings are the same" << endl;
    if (str1[cons] != '\0' && str2[cons] == '\0') cout << "Answer: 1 --> The first line is larger than the second" << endl;
    if (str1[cons] == '\0' && str2[cons] != '\0') cout << "Answer: -1 --> The first line is less than the second" << endl;
}

int Polindrom(char* str1)
{
    int n = strlen(str1);
    bool flag = true;
    for (int i = 0; i < n / 2; i++)
    {
        if (str1[i] != str1[n - 1 - i]) flag = false;
    }
    if (flag == false) return 0;
    return 1;
}

void LowReg(char* str)
{
    while (*str)
    {
        *str = towlower(*str);
        str++;
    }
}

void DelSpace2(char* str1, char* str2)
{
    str2 = strtok(str1, " ");
    while (str2 != NULL)
    {
        cout << str2;
        str2 = strtok(NULL, " ");
    }
}

void DelPun(char* str1)
{



    /*int cons = strlen(str1);
    for (int i = 0; i < cons; i++)
    {
        if (str1[i] == '.' || str1[i] == ',' || str1[i] == '!' || str1[i] == '?' || str1[i] == ':' || str1[i] == ';' || str1[i] == '_')
            str1[i] = ' ';
    }*/

}

void Count(char* str1)
{
    int cons = 0;
    fstream f("9_task.txt");
    if (!f) { cout << "#Error# File not found" << endl; }
    else
    {
        while (f.getline(str1, N))
        {
            cons++;
        }
    }
    f.close();
    cout << "Numbers of string: " << cons - 1 << endl;
}