Solid Square & Tree Program (User Generated size)‏ (C++ Program)

/* Project: Tutorial

*  Author: Modgil

*  Date: 18/11/2013

*  Description: Program uses a main function to take a user generated defined number to 

deine the size of a square and calls a drawSquare function to generate the

columns and rows of the square using asterisks.

*/

 

#include <iostream> // Uses output stream

using namespace std; // C++ standard library declaration

 

int drawSquare(int myNumbers) // Draw square function uses nested for loop to draw square 

	//	passing 1 parameter as an argument

{

	int myNumber; // passing integer myNumber as argument

	myNumber = myNumbers; // assigning argument

 

	// for loop draws first user generated rows

	for (int i = 0; i < myNumber; i++)

	{

		for (int i = 0; i < myNumber; i++) // nested for loop draws columns

		{

			cout << "* "; // outputs asterisk to screen with space between each loop cycle

		}

		cout << endl; // ends outputs line to suggest next row

	} // end of inner for

 

	return (myNumber); // return for looped asterisk

} // end of draw square function

 

int drawTree(int width, int height)

{

	int treeWidth = width; // Initialise variables to paramaters

	int treeHeight = height;

	int m = treeWidth - 1; // tree width logic

	int q = (treeWidth + 1) / 2; // correct amount of horizontal asterisks for bottom half of tree 

 

 

	// FIRST NESTED FOR LOOP DRAWS THE TOP HALF OF THE TREE

	for (int l=0; l < treeWidth; l++) // for loop control structure, columns

	{

		for (int i = m; i > 0; i--) // nested loop for pyramid spacing

		{

			cout << " ";

		}

		for (int j= 0; j <= l; j++) // asterisk pyramid output top half of tree

		{

			cout << "* ";

		}

		cout << "\n"; // prints new line every cycle

		m--; // decrement for tree width logic so different amounts of asterisks are drawn each cycle

	} // End of tree for loop

 

	// SECOND NESTED FOR LOOP DRAWS THE BOTTOM HALF OF THE TREE

	for (int i = 0; i < treeHeight; i++) // first for loop draws the correct amount of bottom tree asterisks supplies by the logic assigned to q above

	{

		for (int y =0; y < treeWidth / 2; y++) // tree width logic assigns trunk spacing to correct position

		{

			cout << " "; // prints spacing

		}

		for (int i =0; i < q; i++) // prints asterisks for tree trunk

		{

			cout << "* ";

		}

		cout << "\n"; // print snew line

	}

 

	return (treeWidth, treeHeight); // returns parameters to main function

}

 

int main() // main function acts as entry point

{

	// Declares integer variable for user generated input

	int number;

	int width;

	int height;

 

	// Prompts user to enter a number

	cout << "Enter a number: ";

	cin >> number; // stores user inp ut in integer variable

 

	drawSquare(number); // Calls draw square function with user generated number passed as parameter

 

	// Prints a new line

	cout << endl;

	// Prompts user to enter width of tree

	cout << "Enter width: " << endl;

	cin >> width; // Stores input in variable

 

	cout << "Enter height: " << endl;

	cin >> height;

 

	// Calls drawTree function

	drawTree(width, height);

 

	cin.ignore(2); // stops program from exiting

	return 0;

 

} // End of main function