asterisk triangle in dev.c

pls help me out, how do i do this in dev.c its a bit difficult for a new student:

Q. write a program that will display the following pattern,given the value of n.
1.example if n=5, output will be:

Code:

         *
       ***
     *****
   *******
 *********

2.example if n=4,output will be:

Code:

****
  ***
    **
      *

txn 4 ur help :happy: