SmileBD

#include <stdio.h>

int main()
{
    int i, j, n;
 
    //Reads number of rows to be printed from user
    printf("Enter number of rows: ");
    scanf("%d", &n);

    for(i=1; i<=n; i++)
    {
        //Prints trailing spaces
        for(j=1; j<i; j++)
        {
            printf(" ");
        }

        //Prints the hollow square 
        for(j=1; j<=n; j++)
        {
            if(i==1 || j==1 || i==n || j==n)
            {
                printf("*");
            }
            else
            {
                printf(" ");
            }
        }

        printf("\n");
    }

    return 0;
}