lab3.1

#include <iostream>
#include<fstream>
#include<string>
#include <set>
#include <algorithm>

using namespace std;

bool Choic() {
    bool IsCorrect = true;
    string Choice;
    bool Console = true;
    while(IsCorrect) {
        cout << "If you want to enter data from the console, enter Y or y, and if from the file, enter N or n\n";
        cin >> Choice;
        if ((Choice == "Y") || (Choice == "y") || (Choice == "N") || (Choice == "n")) {
            IsCorrect = false;
            if ((Choice == "Y") || (Choice == "y")) {
                Console = true;
            }
            else {
                Console = false;
            }
        }
        else {
            IsCorrect = true;
            cout << "This is mistake\n";
        }
    }
    return Console;
}

string EnterText() {
    cout << "Enter the text. All special characters and numbers such as 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, /, -, _, =, +, @, #, $, %, ^, &, *, (, ) will be deleted.\n";
    string Text;
    while (getline(cin, Text))
        return  Text;
}

string EnterFileText() {
    ifstream fin("D:\\input.txt");
    string Text;
    while (getline(fin, Text))
        return  Text;
}

string EditText(bool Choise) {
    set<char> InvalidValues {'1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '"', ']', '}', '}', '[', '/', '-', '_', '=', '+', '@', '#', '$', '%', '^', '&', '*', '(', ')'};
    set<char> Values {'!', ';', ':', ',', '.', '?'};
    string Text;
    if (Choise) {
        Text = EnterText();
    }
    else {
        Text = EnterFileText();
    }
    int Lengt;
    int I = 0;
    Lengt = size(Text);
    while (I <= Lengt) {
        if (InvalidValues.count(Text[I])) {
            Text.erase(I,1);
            I--;
            Lengt--;
        }
        if ((Text[I] == ' ') && (Text[I] + 1 == ' ')){
            Text.erase(I,1);
            I--;
            Lengt--;
        }
        if ((Values.count(Text[I])) && (Values.count(Text[I + 1]))) {
            Text.erase(I,1);
            I--;
            Lengt--;
        }
        I++;
    }
    return Text;
}

void  Encryption(bool Choice) {
    ofstream fout("D:\\output.txt");
    set<char> Values {'!', ';', ':', ',', '.', '?'};
    string Text = EditText(Choice);
    int Lengt = size(Text);
    int Count = 0;
    int I = 0;
    string Temp;
    int Parity = 0;
    while (I < Lengt) {
        Count++;
        if (Text[I] == ' ') {
            Parity++;
            if (Parity % 2 == 0) {
                Temp = Text.substr(I - (Count - 1), Count - 1);
                for (int J = 0; J < Count; J++) {
                    Temp[J] = toupper(Temp[J]);
                }
                Text.erase(I - (Count - 1), Count - 1);
                Text.insert(I - (Count - 1), Temp);
                Count = 0;
            }
            else {
                Text.insert(I - (Count - 1), 1, '(');
                Text.insert(I + 1, 1, ')');
                Lengt = Lengt + 2;
                I = I + 2;
                Count = 0;
            }
            if (Values.count(Text[I + 1])) {
                I++;
            }
        }
        if ((Values.count(Text[I])) && (I < Lengt) && (Text[I - 1] != ' ')) {
            Parity++;
            if (Parity % 2 == 0) {
                Temp = Text.substr(I - (Count - 1), Count - 1);
                for (int J = 0; J < Count; J++) {
                    Temp[J] = toupper(Temp[J]);
                }
                Text.erase(I - (Count - 1), Count - 1);
                Text.insert(I - (Count - 1), Temp);
                Count = 0;
            }
            else {
                Text.insert(I - (Count - 1), 1, '(');
                Text.insert(I + 1, 1, ')');
                Lengt = Lengt + 2;
                I = I + 2;
                Count = 0;
            }
            if (Values.count(Text[I + 1])) {
                I++;
            }
        }
        if ((I == Lengt) && (Values.count(Text[I]))) {
            Parity++;
            if (Parity % 2 == 0) {
                Temp = Text.substr(I - (Count - 1), Count - 1);
                for (int J = 0; J < Count; J++) {
                    Temp[J] = toupper(Temp[J]);
                }
                Text.erase(I - (Count - 1), Count - 1);
                Text.insert(I - (Count - 1), Temp);
                Count = 0;
            }
            else {
                Lengt = Lengt + 2;
                Text.insert(I - (Count - 1), 1, '(');
                Text.insert(I + 1, 1, ')');
                I = I + 2;
                Count = 0;
            }
        }
        else {
            if (I == Lengt - 1) {
                Parity++;
                if (Parity % 2 == 0) {
                    Temp = Text.substr(I - Count, Count + 1);
                    for (int J = 0; J < Count; J++) {
                        Temp[J] = toupper(Temp[J]);
                    }
                    Text.erase(I - Count, Count + 1);
                    Text.insert(I - Count, Temp);
                    Count = 0;
                }
                else {
                    Lengt = Lengt + 2;
                    Text.insert(I - (Count - 1), 1, '(');
                    Text.insert(I + 2, 1, ')');
                    I = I + 2;
                    Count = 0;
                }
            }
        }
        I++;
    }
    if (Choice) {
        cout << Text;
    } else {
        cout << Text;
        fout << Text;
    }
}

void body() {
    bool Choice = Choic();
    Encryption(Choice);
}

int main() {
    cout << "This program in the text in every even word replaces all lowercase alphabetic characters with uppercase, and each odd word is enclosed in parentheses";
    body();
    return 0;
}