题解 | #空心正方形图案#

方法一：通过数组，先打印外面的*，  再来一个小的打印空格
#include <stdio.h>
int main()
{     int i = 0;     int j = 0;     int n = 0;     int arr[100][100] = { 0 };     while (scanf("%d", &n) != EOF)     {         for (i = 0; i < n; i++)         {             for (j = 0; j < n; j++)             {                 arr[i][j] = '*';             }         }         for (i = 1; i < n - 1; i++)         {             for (j = 1; j < n - 1; j++)             {                 arr[i][j] = ' ';             }         }         for (i = 0; i < n; i++)         {             for (j = 0; j < n; j++)             {                 printf("%c ", arr[i][j]);             }             printf("\n");         }     }          return 0;
}



方法二：通过找到有*的规律打印

#include <stdio.h>
int main()

{

    int n = 0;

    while (scanf("%d", &n) != EOF)

    {

        for (int i = 0; i < n; i++)

        {

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

            {

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



                    printf("* ");

                else

                    printf("  ");

            }

            printf("\n");

        }



    }

    return 0;

}