打印螺旋数组

/*******************************************************

 1  2  3  4  5  6  7  8  9 

32 33 34 35 36 37 38 39 10 

31 56 57 58 59 60 61 40 11 

30 55 72 73 74 75 62 41 12 

29 54 71 80 81 76 63 42 13 

28 53 70 79 78 77 64 43 14 

27 52 69 68 67 66 65 44 15 

26 51 50 49 48 47 46 45 16 

25 24 23 22 21 20 19 18 17

*******************************************************/

#include

#include

#define N 102

int main() {

int i, j, n, k;

int arr[N][N];

printf("矩阵大小：");

scanf("%d", &n);

n = n > 100 ? 100 : n;

memset(arr, 0, sizeof(arr));

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

arr[0][i] = arr[n + 1][i] = arr[i][0] = arr[i][n + 1] = 1;

i = j = k = 1;

while(true) {

arr[i][j] = k++;

if(arr[i][j - 1] != 0 && arr[i + 1][j] == 0)

++i;

else if(arr[i][j + 1] == 0)

++j;

else if(arr[i - 1][j] == 0)

--i;

else if(arr[i][j - 1] == 0)

--j;

else

break;

}

for(j = 1; j <= n; ++j){

for(i = 1; i <= n; ++i)

printf("%2d ", arr[i][j]);

printf("\n");

}

return 0;

}