Thread: I'm new to programming, and I need help making a hollow triangle.

program must include the following:
ask the user for triangle size
triangle size must be between 1 and 20
it must ask the user if he wants to draw another triangle (Y or N)
ex:
enter triangle size: 25
size between 1 and 20, enter triangle size:5
*
**
* *
* *
*****
would you like to draw another triangle (Y or N): Y
enter triangle size: 3
and so on....

Code:

//This is my code
#include <iostream>
#include <iomanip>
using namespace std;


//main prgram
int main()
{
    int t_s,        //size of the triangle
        col,        //vertical line
        line;        //horizontal line
    char ans;        //Answer (Yes or No).


    system("CLS");
    cout << "Take Home #6 by Erick Aguilera - "
         << "The Draw Triangle\n\n";
        do
    {
    cout << "Enter the triangle size: ";
    // size of triangle
    cin >> t_s;
         while ((t_s < 1) || (t_s > 20))            
        {
            cout << "Size must be between 1 and 20, "
            << "Enter the triangle size: ";
            cin >> t_s;
        }
         for(col=1; col <= t_s; col++)
    {    // add one '*' to line as many times as
        // the value of col.
        for(line=1; line<=col; line++)
        {
            cout << "*";
        }
        cout << " ";
        cout << endl;
    }
            cout << "Would you like to draw another triangle "
            << "(Y or N): ";
        cin >> ans;


    }while (ans == 'Y');
    
    cout << "End Program.\n";
    


    return 0;
}

Originally Posted by GReaper

Would you like the triangle to be like this:

Code:

*
* *
*   *
* * * *

or this:

Code:

   *
  * *
 *   *
* * * *

Each shape has its own tricks to make.

Like the first one

Originally Posted by GReaper

Ok, then. Say "n" is the current triangle line, starting from 1 ( 0 is the first line, which is only a star ).
For the hollow part you print a star, (2*n - 1) spaces and a star.
For the last line, you either print (2*n - 1) stars or star-space-star-etc.

could you show me in the code how, because i'm really new at this and i don't really get it.