C program to print hollow pyramid star pattern

/**

 * C program to print hollow pyramid  star pattern

                *
             *     *
           *           *
        *                 *
      *                      *

 
*/

#include <stdio.h>

#include<conio.h>

void main()

{

    int i, j, rows;

    /* Input rows to print from user */

    printf("Enter number of rows : ");

    scanf("%d", &rows);

    for(i=1; i<=rows; i++)

    {

        /* Print trailing spaces */

        for(j=i; j<rows; j++)

        {

            printf(" ");

        }

        /* Print hollow pyramid */

        for(j=1; j<=(2*i-1); j++)

        {

            /*

             * Print star for last row (i==rows),

             * first column(j==1) and for

             * last column (j==(2*i-1)).

             */

            if(j==1 || j==(2*i-1))

            {

                printf("*");

            }

            else

            {

                printf(" ");

            }

        }

        /* Move to next line */

        printf("\n");

    }

    getch();

}

source: codeforwin.org