C++,Devcpp

NOTE: Please provide the comment for each section//, I am a beginner, I need to understand, how the program is working. Thanks.

Diamond pattern, but it adds a bit more work. The steps are:

1) Write code that displays a 7-line diamond pattern on the screen. This can be done using a double-nested for-loop. The inner loop displays a line of stars, one column (space ' ' or star *) at a time. The outer loop displays multiple lines, one row (*****) at a time. This 7-line diamond pattern can easily be done with 7 cout statements, but then you cannot complete the next step.

2) Instead of only making diamonds with exactly 7 lines, ask the user how many lines to make the diamond, then make the diamond with the size desired. If the size requested is <=0, dont make a diamond. It should work for both even and odd number of lines. See chapter 5, top of page 267 (7ed), page 270 (8ed), page 271 (9ed) for code that will loop using a for-loop. Position diamonds to the far left. Don't display unnecessary extra columns of spaces on the far left or right.

3) It is tedious to use and test a program if it does one thing and stops. In this step, put the diamond drawing code inside another loop. It is now triple-nested. The outer loop should repeatedly prompt the user for the number of lines to make the diamond. If the number is <= 0, quit. Otherwise, make a diamond pattern with the number of lines entered. Keep asking the user for the number of lines to draw, then draw one diamond shape, UNTIL the user wants to quit. A size of <=0 means to quit.

4) When creating the row of spaces (" ") and stars (***), you can construct a string with exactly the number of characters (' ' or *') you want in one statement without using a loop. Hint: This is described in Table 12-6 on page 806 (7ed) and Table 12-4 on page 817 (8ed). This string constructor was removed from Table 12-3 on page 840 (9ed), but here is a hint: string (int n, char ch); This simplifies the code by eliminating the inner-most loop. This is the most possible points.

Example: Enter the number of rows desired to make a diamond pattern (0 to quit): 5 * *** ***** *** *

Enter the number of rows desired to make a diamond pattern (0 to quit): 7 * *** ***** ******* ***** *** *

Enter the number of rows desired to make a diamond pattern (0 to quit): 4 * *** *** *

Enter the number of rows desired to make a diamond pattern (0 to quit): 0 Goodbye!

Hint: Each row consists of spaces and stars. To compute the correct number of spaces and stars for each row, consider making a table: line number, spaces, stars. Think of the relationship between: line number, number of spaces for that line, number of stars for that line. For help with this, look in Program Samples for Excel file to aid Lab 2: lines to diamonds. This is a spreadsheet that helps to analyze the problem.

Even a simple lab like this has valid variations. For example, more symmetric diamonds may be drawn like this: This program draws diamonds using simple ASCII

Enter number of rows in diamond, 0 to quit: 1 *

Enter number of rows in diamond, 0 to quit: 2 ** **

Enter number of rows in diamond, 0 to quit: 3 * *** *

Enter number of rows in diamond, 0 to quit: 4 ** **** **** ** Enter number of rows in diamond, 0 to quit: 0

Good-bye!