实验7-2-9 螺旋方阵

#include <stdio.h>

int main(void)
{
    int n, i, j, number;
    int array[10][10];
    int top, bottom, left, right;
    
    scanf("%d", &n);
    top = 0;        //上
    bottom = n - 1; //下
    left = 0;       //左
    right = n - 1;  //右
    
    number = 0;
    //旋转的圈数
    for (j = 0; j <= n / 2; j++)
    {
        //向左
        for (i = left; i <= right; i++)
        {
            number++;
            array[top][i] = number;
        }
        top++;
        
        //向下
        for (i = top; i <= bottom; i++)
        {
            number++;
            array[i][right] = number;
        }
        right--;
        
        //向左
        for (i = right; i >= left; i--)
        {
            number++;
            array[bottom][i] = number;
        }
        bottom--;
        
        //向上
        for (i = bottom; i >= top; i--)
        {
            number++;
            array[i][left] = number;
        }
        left++;
    }
    
    for (i = 0; i < n; i++)
    {
        for (j = 0; j < n; j++)
        {
            printf("%3d", array[i][j]);
        }
        printf("
");
    }
    
    return 0;
}