-bash-4.3$ ./triangles
enter number and size of triangles
1 5
*
**
***
****
*****
-bash-4.3$ ./triangles
enter number and size of triangles
2 5
*     *****
**    ****
***   ***
****  **
***** *
-bash-4.3$ ./triangles
enter number and size of triangles
3 5
*     ***** *****
**    ****   ****
***   ***     ***
****  **       **
***** *         *
-bash-4.3$ ./triangles
enter number and size of triangles
4 5
*     ***** *****     *
**    ****   ****    **
***   ***     ***   ***
****  **       **  ****
***** *         * *****
-bash-4.3$ ./triangles
enter number and size of triangles
5 5
number must be between 1 and 4
enter number and size of triangles
4 0
size must be greater than 0
enter number and size of triangles
5 0
number must be between 1 and 4
size must be greater than 0
enter number and size of triangles
3 20
*                    ******************** ********************
**                   *******************   *******************
***                  ******************     ******************
****                 *****************       *****************
*****                ****************         ****************
******               ***************           ***************
*******              **************             **************
********             *************               *************
*********            ************                 ************
**********           ***********                   ***********
***********          **********                     **********
************         *********                       *********
*************        ********                         ********
**************       *******                           *******
***************      ******                             ******
****************     *****                               *****
*****************    ****                                 ****
******************   ***                                   ***
*******************  **                                     **
******************** *                                       *
-bash-4.3$