1 //蛇形矩阵
2 #include <stdio.h>
3 #define N 5
4
5 int main()
6 {
7 int i, j, k, a[N][N];
8 int circle = 0;
9 for(i=0; i<N; i++)
10 for(j=0; j<N; j++)
11 a[i][j] = 0;
12 i = 0; j = 0; k=1;
13 while(circle <= N/2)
14 {
15 if(i==(0+circle) && j==(0+circle))
16 {
17 while(j<N-circle) a[i][j++] = k++;
18 i=1+circle;j=N-1-circle;
19 }
20 if(i==(1+circle) && j==(N-1-circle))
21 {
22 while(i<N-circle) a[i++][j] = k++;
23 i=N-1-circle; j=N-2-circle;
24 }
25 if(i==(N-1-circle) && j==(N-2-circle))
26 {
27 while(j>=0+circle)a[i][j--] = k++;
28 i=N-2-circle; j=0+circle;
29 }
30 if(i==(N-2-circle) && j==(0+circle))
31 {
32 while(i>=1+circle) a[i--][j] = k++;
33 circle++;
34 i=circle; j=circle;
35 }
36 }
37 printf("\n");
38 for(i=0; i<N; i++)
39 {
40 printf("\t");
41 for(j=0; j<N; j++)
42 printf("%4d", a[i][j]);
43 printf("\n");
44 }
45 return 0;
46 }
