Lab 8 – Pair Programming Loops

The following is a program that prints an n line triangle. Expand this program such that it will print an n line triangle and an n line square. For example if you wish to print a 5 line triangle and square the output of the program would be as follows:

How many lines? 5

*

* *

* *

* *

* * * * *

* * * * *

* *

* *

* *

* * * * *

Press any key to continue . . .

A ten line output would look like this:

How many lines? 10

*

* *

* *

* *

* *

* *

* *

* *

* *

* * * * * * * * * *

* * * * * * * * * *

* *

* *

* *

* *

* *

* *

* *

* *

* * * * * * * * * *

Press any key to continue . . .

#include <iostream>

#include <iomanip>

using namespace std;

int

main()

{

int i, j;

int space = 2; //number of spaces to print

int lines; //number of lines in the triangle

cout << "How many lines? ";

cin >> lines;

//Print triangle

// Print first line

cout << '*' << endl;

// Print middle

for (i = 1; i < lines -1; ++i)

{

cout << '*' << setw(space) << '*' << endl;

space +=2;

}

//Print last line.

cout << '*';

for (i = 0; i < lines-1; i++)

cout << " *";

cout << endl << endl;

//Printing square

//Place your square code here

return 0;

}

Extra Credit: Prompt the user enter a ‘t’ if they wish to print a triangle and an ‘s’ to print a square. Print the geometric figure of the user’s choice. Make sure you do error checking to guarantee the user enters the requested characters.