---

ЛИСТИНГ
1. Код первого задания. С  С++
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define MAX_TITLE 100
#define MAX_AUTHOR 100

typedef struct {
    char title[MAX_TITLE];
    char author[MAX_AUTHOR];
    int year;
} Book;

Book* add_book(Book* books, int* count,
               const char* title, const char* author, int year) {
    books = realloc(books, (*count + 1) * sizeof(Book));
    if (!books) {
        fprintf(stderr, "Memory allocation error\n");
        exit(1);
    }
    strncpy(books[*count].title, title, MAX_TITLE - 1);
    books[*count].title[MAX_TITLE - 1] = '\0';
    strncpy(books[*count].author, author, MAX_AUTHOR - 1);
    books[*count].author[MAX_AUTHOR - 1] = '\0';
    books[*count].year = year;
    (*count)++;
    return books;
}

void print_books(const Book* books, int count) {
    for (int i = 0; i < count; i++) {
        printf("\"%s\" by %s (%d)\n",
               books[i].title, books[i].author, books[i].year);
    }
}

int cmp_by_year(const void* a, const void* b) {
    return ((Book*)a)->year - ((Book*)b)->year;
}

int main() {
    Book* library = NULL;
    int count = 0;
    library = add_book(library, &count,
                       "The C Programming Language", "K&R", 1978);
    library = add_book(library, &count,
                       "Clean Code", "Robert C. Martin", 2008);
    library = add_book(library, &count,
                       "Design Patterns", "GoF", 1994);

    printf("Before sorting:\n");
    print_books(library, count);

    qsort(library, count, sizeof(Book), cmp_by_year);

    printf("\nSorted by year:\n");
    print_books(library, count);

    free(library);
    return 0;
}

2. Код первого задания. С ++  С
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>

class Book {
public:
    std::string title;
    std::string author;
    int year;

    Book(std::string t, std::string a, int y)
        : title(std::move(t)), author(std::move(a)), year(y) {}

    friend std::ostream& operator<<(std::ostream& os, const Book& b) {
        os << '"' << b.title << "\" by " << b.author << " (" << b.year << ')';
        return os;
    }
};

int main() {
    std::vector<Book> library;
    library.emplace_back("The C++ Programming Language",
                         "Bjarne Stroustrup", 2013);
    library.emplace_back("Effective Modern C++",
                         "Scott Meyers", 2014);
    library.emplace_back("The Art of Computer Programming",
                         "Donald Knuth", 1968);

    std::cout << "Before sorting:\n";
    for (const auto& book : library)
        std::cout << book << '\n';

    std::sort(library.begin(), library.end(),
              [](const Book& a, const Book& b) { return a.year < b.year; });

    std::cout << "\nSorted by year:\n";
    for (const auto& book : library)
        std::cout << book << '\n';

    return 0;
}
3. Код первого задания. С  С++
#include <iostream>
#include <string>
#include <map>
#include <sstream>
#include <iomanip>

int main() {
    std::string text = "hello world hello c++ world";
    std::map<std::string, int> freq;
    std::istringstream iss(text);
    std::string word;

    while (iss >> word) {
        ++freq[word];
    }

    for (const auto& p : freq) {
        std::cout << std::setw(10) << p.first << ": " << p.second << '\n';
    }
    return 0;
}