Dummy1_.idea_Dummy1.iml

<?xml version="1.0" encoding="UTF-8"?>
<module classpath="CMake" type="CPP_MODULE" version="4" />

Dummy1_.idea_encodings.xml

<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
  <component name="Encoding" addBOMForNewFiles="with NO BOM" />
</project>

Dummy1_.idea_misc.xml

<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
  <component name="CMakeWorkspace" PROJECT_DIR="$PROJECT_DIR$" />
  <component name="JavaScriptSettings">
    <option name="languageLevel" value="ES6" />
  </component>
</project>

Dummy1_.idea_modules.xml

<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
  <component name="ProjectModuleManager">
    <modules>
      <module fileurl="file://$PROJECT_DIR$/.idea/Dummy1.iml" filepath="$PROJECT_DIR$/.idea/Dummy1.iml" />
    </modules>
  </component>
</project>

Dummy1_CMakeLists.txt

cmake_minimum_required(VERSION 3.13)
project(Dummy1)

set(CMAKE_CXX_STANDARD 14)

add_executable(Dummy1 main.cpp)

Dummy1_main.cpp

#include <iostream>
#include <string>

using namespace std;

int max(const int arr[], int length) {

    if (length <= 0)
        return -1;

    int max = arr[0];

    for (int i = 0; i < length; ++i)
        if (arr[i] > max)
            max = arr[i];

    return max;
}

int min(const int arr[], int length) {

    if (length <= 0)
        return -1;

    int min = arr[0];

    for (int i = 0; i < length; ++i)
        if (arr[i] < min)
            min = arr[i];

    return min;
}

string toString(int arr[], int length) {

    string str = "[";

    for (int i = 0; i < length; ++i) {

        str += to_string(arr[i]);

        if (i < length - 1)
            str += ", ";
        else
            str += "]";
    }

    return str;
}

int main() {

    const int length = 5;

    int numbers[length];

    cout << "Enter the " << length << " numbers:";

    for (int i = 0; i < length; ++i)
        cin >> numbers[i];

    cout << "numbers" << toString(numbers, length) << endl
         << "max: " << max(numbers, length) << endl
         << "min: " << min(numbers, length) << endl;

    return 0;
}