HW_10.cpp

#include <iostream>
#include <windows.h>
using namespace std;

void Line(int lenght, char symb, int color, bool horizontal) {
	if (lenght < 0)
		cout << "Error: Length cannot be negative!" << "\n";
	else {
		HANDLE h = GetStdHandle(STD_OUTPUT_HANDLE);
		SetConsoleTextAttribute(h, color);
		if (horizontal) {
			for (int i = 0; i < lenght; i++) {
				cout << symb;
			}
		}
		else {
			for (int i = 0; i < lenght; i++) {
				cout << symb << "\n";
			}
		}
		SetConsoleTextAttribute(h, 7);
	}
}

void Rectangle(int width, int height, char border, char fill) {
	if (width < 0 || height < 0)
		cout << "Error; Width or height cannot be negative!" << "\n";
	else {
		for (int i = 0; i < height; i++) {
			for (int j = 0; j < width; j++) {
				if (i == 0 || i == height - 1 || j == 0 || j == width - 1) {
					cout << border;
				}
				else {
					cout << fill;
				}
			}
			cout << "\n";
		}
	}
}

void Cube_of_a_number(double number) {
	if (number < 0)
		cout << "Error: Number cannot be negative!" << "\n";
	else {
		double cube = number * number * number;
		cout << "Result: " << cube << "\n";
	}
}

void Prime_number(int num) {
	if (num < 0)
		cout << "Error: Number cannot be negative!" << "\n";
	else {
		bool isPrime = true;
		for (int i = 2; i <= num / 2; i++) {
			if (num % i == 0) {
				isPrime = false;
			}
		}
		if (isPrime && num > 1) {
			cout << num << " is a prime number." << "\n";
		}
		else {
			cout << num << " is not a prime number." << "\n";
		}
	}
}

int main()
{
	//1st
	Line(-20, '@', 12, true);
	cout << "\n";

	//2nd
	Rectangle(15, 5, '#', '$');
	cout << "\n";

	//3rd
	Cube_of_a_number(3);
	cout << "\n";

	//4th
	Prime_number(4);
	cout << "\n";
}