How to draw shapes in C++?

Question

Without using built-in functions or string functions. Just using for and/or while loops, with very basic programming...an example of a Horizontal Line would be this (to give you an idea):

while (i < line + 1)
{
cout << shapesym;
i++;
}

Except I need to know how to draw a triangle like this

__#
_##
###

With _ as a blank line, and a diamond like this:

__#__
_###_
#####
_###_
__#__

Also with _ as a blank line.

Please, can anyone help? I am having a lot of trouble figuring out how to make these shapes, even though I understand looping...it's the drawing part with the loop that is throwinng me off, I can't get anything to turn out right...

V Ronin · Accepted Answer

triangle: cout << " #\n ##\n###";

diamond: cout << " #\n ###\n#####\n ###\n #";

if you want to specify the number of lines for each shape:

triangle:

for (int i=1;i<=lines;i++){

for (int j=lines;j>=1;j--){

if (j>i){cout << " ";}

else {cout << "#";}

}

cout << "\n";

}

Edit: I tried this code:

#include <iostream>

using namespace std;

int main(){

int lines=3;

for (int i=1;i<=lines;i++){

for (int j=lines;j>=1;j--){

if (j>i){cout << " ";}

else {cout << "#";}

}

cout << "\n";

}

cin >> lines;

}

and it works fine for the triangle! now I'll write you the code for the diamond

Bill · Answer

There are several ways to do this. I think the easiest way would be for you to create a 2 dimensional character matrix and use that as a basic euclidean coordinate map and graph the shape out. Then when you are finished just loop through your matrix and print it to the screen.

? · Answer

hmm i think i am in the same class as you. i live in vegas and go to unlv. I havent started on the assignment yet, still need to do the first line. Things do on monday lol. Maybe i will be able to help when i get going, im just about to open up my book now.

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How to draw shapes in C++?

3 Answers