Print O patterns with C Language

                                                            

                                                  

#include<stdio.h>

#include<conio.h>

void main()

{

                        int i,n,j;

                        printf("\t enter value of n=");

                        scanf("%d",&n);

                        printf("\n\n");

                        for(i=0;i<n;i++)

                        {

                                    for(j=0;j<n;j++)

                                    {

                                                 if(j==0||j==n-1||i==0||i==n-1)

                                                 {

                                                              printf("*");

                                                 }

                                                 else

                                                 {

                                                              printf(" ");

                                                 }

                                    }

                                     printf("\n");

              }

}