C++ for command help

darkangel29 · 02-12-2007, 08:45 AM

Hello,
I need to write a program for my C++ class that prints the following diamond shape using the for command and cout.

Code:

        *
       ***
      *****
     *******
    *********
     *******
      *****
       ***
        *

Code:

#include <iostream.h>
 void main(){
	int n;
	double i,j;
	n=5;
	for(i=0;i<=n-1;i++){
		for(j=0;j<=i;j++){
			cout<<"*";
		}//endfor
		cout<<endl;
	}//endfor
}//endmain

This prints:

Code:

*
**
***
****
*****

Thanks a million.

wjevans_7d1@yahoo.co · 02-12-2007, 11:28 AM

So finish the program.

I hope you get a good grade on it!

matthewg42 · 02-12-2007, 12:01 PM

I'd probably start by making a function which takes an integer argument and returns 1,3,5,7,9,7,5,3,1. Then maybe another function to build line number n (returning a string), and have the main program containing a simple loop which calls it.

Splitting up a program in to functions might even get you extra marks (assuming that's been discussed in you class).

graemef · 02-12-2007, 10:20 PM

Indeed you are getting there, you have:

Code:

*
**
***
****
*****

can you now get:

Code:

*****
****
***
**
*

Combine the two together and you might be able to get:

Code:

*
**
***
*****
****
***
**
*