## trickx Newbie Poster

hi!..i really need some help..
i need to print a pyramid pattern shown below in c++ language using a nested for loop...
1
1 2 1
1 2 4 2 1
1 2 4 8 4 2 1
1 2 4 8 16 8 4 2 1
1 2 4 8 16 32 16 8 4 2 1

consider that each spaces are separated by tab..
I can only print this with my source code....
1
1 2
1 2 4
1 2 4 8
1 2 4 8 16
1 2 4 8 16 32

i can't figure out the condition on how to print out the remaining numbers shown below..

1
2 1
4 2 1
8 4 2 1
16 8 4 2 1

any help would be very much appreciated...please help me...

thank you for having time reading this post.

note: that is in pyramid pattern, not a right triangle one.

## Narue 5,707

You have one loop counting up. Add another one that counts down (the reverse of your counting up loop) before printing the newline.

## trickx

am..kindly give me an example?
what i know is i should divide a number in order to get a counting down value..
is it correct?

## trickx

am..how would i do that?
kindly give me an example?
it is very much appreciated...

## Narue 5,707

kindly give me an example?

Please don't act that helpless. You've written most of the code already, so you clearly know how to write a loop (unless you stole the code you attached). You have two nested loops right now, add a third that counts back down to `num == 1` .

Also note that your loops need braces if they have more than one statement.

## subtracktor

I hope this will help you

``````#include <iostream>
using namespace std;

int main()
{
int height = 0;
cin >> height;

if(height < 1)
{
return 1;
}

for(int i = 1; i <= height; i++)
{
for(int j = 0; j < i; j++)
{
cout << (1 << j) << ' ';
}
for(int j = i-2; j >= 0; j--)
{
cout << (1 << j) << ' ';
}
cout << endl;
}

return 0;
}``````

## jonsca 1,059

I hope this will help you

No, in fact you've hurt his/her chances of learning from this because you've done it for him/her.

## subtracktor

To: Jonsca
Sorry about that. When I start to learning C++, I always appreciate if somebody share his/her code with me. After that I try to write all by myself. That help me to learn reading other people`s code. I think that is as much important as writing a code.
Thats just my opinion.
Actually never mind.