Solutions to "practice: printing shapes with loops" https://wheelercj.github.io/notes/pages/20200522233055.html

main.cpp

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

int main()
{
	// *****
	for (int i = 0; i < 5; i++)
		cout << '*';

	cout << "\n\n";

	/*
		*
		*
		*
		*
		*
	*/
	for (int i = 0; i < 5; i++)
		cout << '*' << endl;

	cout << endl;

	/*
		*****
		*****
		*****
		*****
		*****
	*/
	for (int i = 0; i < 5; i++)
	{
		for (int j = 0; j < 5; j++)
			cout << '*';
		cout << endl;
	}

	cout << endl;

	/*
		*
		**
		***
		****
		*****
	*/
	for (int i = 0; i < 5; i++)
	{
		for (int j = 0; j < i + 1; j++)
			cout << '*';
		cout << endl;
	}

	cout << endl;

	/*
		*****
		****
		***
		**
		*
	*/
	for (int i = 5; i > 0; i--)
	{
		for (int j = i; j > 0; j--)
			cout << '*';
		cout << endl;
	}

	cout << endl;

	/*
		*
		*
		*
		*
		*
	*/
	for (int i = 0; i < 5; i++)
	{
		for (int j = 0; j < 4; j++)
			cout << ' ';
		cout << '*' << endl;
	}

	cout << endl;

	/*
		    *
		   **
		  ***
		 ****
		*****
	*/
	for (int i = 0; i < 5; i++)
	{
		for (int j = 4; j > i; j--)
			cout << ' ';
		for (int j = 0; j <= i; j++)
			cout << '*';
		cout << endl;
	}

	cout << endl;

	/*
		*****
		 ****
		  ***
		   **
		    *
	*/
	for (int i = 0; i < 5; i++)
	{
		for (int j = 0; j < i; j++)
			cout << ' ';
		for (int j = 5; j > i; j--)
			cout << '*';
		cout << endl;
	}

	cout << endl;

	/*
		*****
		*   *
		*   *
		*   *
		*****
	*/
	for (int i = 0; i < 5; i++)
	{
		int k = 2;
		if (i == 0 || i == 4)
			k = 5;

		for (int j = 0; j < k; j++)
		{
			cout << '*';
			if (k == 2 && j == 0)
			{
				for (int m = 0; m < 3; m++)
					cout << ' ';
			}
		}

		cout << endl;
	}

	cout << endl;

	/*
		*
		**
		***
		****
		*****
		****
		***
		**
		*
	*/
	for (int i = 0; i < 9; i++)
	{
		for (int j = 0; j <= -abs(i - 4) + 4; j++)
			cout << '*';
		cout << endl;
	}

	cout << endl;

	/*
		    *
		   ***
		  *****
		 *******
		*********
		 *******
		  *****
		   ***
		    *
	*/
	for (int i = 9; i > 0; i--)
	{
		for (int j = 0; j < abs(i - 5); j++)
			cout << ' ';
		for (int j = 0; j < -2 * abs(i - 5) + 9; j++)
			cout << '*';
		cout << endl;
	}

	cout << endl;

    /*
                  *
              *********
             **       **
           **           **
           *             *
          *               *
         **               **
         *                 *
         *                 *
         *                 *
        **                 **
         *                 *
         *                 *
         *                 *
         **               **
          *               *
           *             *
           **           **
             **       **
              *********
                  *
    */
	int center_x = 30;
	int center_y = 20;
	int radius = 10;
	for (int degrees = 0; degrees < 360; degrees++) {
		double radians = degrees / 360.0 * 2 * 3.14159265358979323846;
		int x = int(radius * cos(radians)) + center_x;
		int y = int(radius * sin(radians)) + center_y;
		cout << "\x1b[" << y << ";" << x << "H";
		cout << "*";
	}
	
	cout << "\n\n\n\n\n\n\n\n\n\n\n";
	return 0;
}