Thread: Triangle pattern

Originally Posted by dynamethod

when i set y in my case to 0, i seem to have a gap at the top line of the output like this:

Code:

    
   A
  BB
 CCC
DDDD

where as i set y to 1, i get:

Code:

   A
  BB
 CCC
DDDD

Whoa!!! Actually i didn't think about the constructing a string.
The result you're getting is normal. Setting y=0 means you're creating a first string with only spaces and the second one is empty.
The string constructor builds up a string with n specified characters. In your case the first string si a 5-y length string of ' ', second one is a 0+y length string of 64+y characters.

To remove the white space you can create the strings this way:

Code:

#include<iostream>
#include<string>

using namespace std;

int main()
{
	for(int y = 0; y < 4; y++) 
	{	
		cout << string((3-y),' ');
		cout << string((1+y), 65+y);
		cout << "\n";
	}
	
	cin.get();
	return 0;
}

Note that I left the 4 since it's the number of characters you want to print, so if you wanto to parameterize the function... (and notice that the 3 in the first string constructor is 4-1 )

Regards,
Tesctassa

Second one is trickier, you can do it with 5 abstractly nested "for a while" loops but that has rarely been tried. Your safest strategy is to do it without thinking.