From 0b4cde0695a6997e5f367b4f66ebc2688bbd2919 Mon Sep 17 00:00:00 2001
From: Andrey Velisov <76114802+MrZ0niCs@users.noreply.github.com>
Date: Sun, 10 May 2026 22:57:33 +0300
Subject: [PATCH] MiniHW4-by-Vasilev-Andrey

hw4
---
 main.cpp   | 87 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 output.txt | 24 +++++++++++++++
 2 files changed, 111 insertions(+)
 create mode 100644 main.cpp
 create mode 100644 output.txt

diff --git a/main.cpp b/main.cpp
new file mode 100644
index 00000000..266b64c2
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,87 @@
+#include <algorithm>
+#include <fstream>
+#include <iostream>
+#include <iterator>
+#include <numeric>
+#include <random>
+#include <string>
+#include <vector>
+
+// функция для вывода вектора без циклов
+void printVector(std::ofstream& out, const std::vector<int>& vec,
+                 const std::string& title) {
+  out << "--- " << title << " ---\n";
+  // алгоритм std::copy для вывода элементов
+  std::copy(vec.begin(), vec.end(), std::ostream_iterator<int>(out, " "));
+  out << "\n\n";
+}
+
+int main() {
+  std::ofstream out_file("output.txt");
+  if (!out_file.is_open()) {
+    std::cerr << "Failed to open output.txt\n";
+    return 1;
+  }
+
+  // генерация 20 чисел
+  std::vector<int> numbers(20);
+  std::random_device rd;
+  std::mt19937 random_gen(rd());
+  std::uniform_int_distribution<int> dist(-50, 100);
+
+  std::generate(numbers.begin(), numbers.end(),
+                [&random_gen, &dist]() { return dist(random_gen); });
+
+  printVector(out_file, numbers, "1. Initial generated vector");
+
+  // минимальный и максимальный элементы
+  auto min_max = std::minmax_element(numbers.begin(), numbers.end());
+  out_file << "--- 2. Min and Max elements ---\n";
+  out_file << "Min: " << *min_max.first << "\n";
+  out_file << "Max: " << *min_max.second << "\n\n";
+
+  // сортировка
+  std::sort(numbers.begin(), numbers.end());
+  printVector(out_file, numbers, "3. Sorted vector");
+
+  // количество положительных, отрицательных и нулевых элементов
+  int positive_count = std::count_if(numbers.begin(), numbers.end(),
+                                     [](int val) { return val > 0; });
+  int negative_count = std::count_if(numbers.begin(), numbers.end(),
+                                     [](int val) { return val < 0; });
+  int zero_count = std::count_if(numbers.begin(), numbers.end(),
+                                 [](int val) { return val == 0; });
+
+  out_file << "--- 4. Element counts ---\n";
+  out_file << "Positive: " << positive_count << "\n";
+  out_file << "Negative: " << negative_count << "\n";
+  out_file << "Zeros: " << zero_count << "\n\n";
+
+  // среднее арифметическое всех элементов
+  double sum = std::accumulate(numbers.begin(), numbers.end(), 0.0);
+  double mean = sum / numbers.size();
+
+  out_file << "--- 5. Arithmetic mean ---\n";
+  out_file << "Mean: " << mean << "\n\n";
+
+  // удаление чисел
+  numbers.erase(std::remove_if(numbers.begin(), numbers.end(),
+                               [](int val) { return val % 2 == 0; }),
+                numbers.end());
+
+  printVector(out_file, numbers, "6. Vector after removing even numbers");
+
+  // новый вектор с уникальными значениями
+  std::sort(numbers.begin(), numbers.end());
+
+  std::vector<int> unique_numbers;
+  std::unique_copy(numbers.begin(), numbers.end(),
+                   std::back_inserter(unique_numbers));
+
+  printVector(out_file, unique_numbers, "7. New vector with unique values");
+
+  out_file.close();
+  std::cout << "Processing complete. Check output.txt file.\n";
+
+  return 0;
+}
\ No newline at end of file
diff --git a/output.txt b/output.txt
new file mode 100644
index 00000000..99c2d9d4
--- /dev/null
+++ b/output.txt
@@ -0,0 +1,24 @@
+--- 1. Initial generated vector ---
+63 88 13 53 -29 20 -11 79 99 6 32 32 23 76 68 89 -36 27 20 9 
+
+--- 2. Min and Max elements ---
+Min: -36
+Max: 99
+
+--- 3. Sorted vector ---
+-36 -29 -11 6 9 13 20 20 23 27 32 32 53 63 68 76 79 88 89 99 
+
+--- 4. Element counts ---
+Positive: 17
+Negative: 3
+Zeros: 0
+
+--- 5. Arithmetic mean ---
+Mean: 36.05
+
+--- 6. Vector after removing even numbers ---
+-29 -11 9 13 23 27 53 63 79 89 99 
+
+--- 7. New vector with unique values ---
+-29 -11 9 13 23 27 53 63 79 89 99 
+