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 1 int vec_rotate(char *vec,int rotdist, int length) {
 2     int i,j,k,times;
 3     char t;
 4     times = gcd(rotdist,length);
 5     printf("%d\n",times);
 6     for(i=0;i<times;i++) {
 7         t = vec[i];
 8         j = i;
 9         while(1) {
10             k = j+ rotdist;
11             if(k>=length)
12                 k-=length;
13             if(k==i)
14                 break;
15             vec[j] = vec[k];
16             j = k;
17         }
18         vec[j]=t;
19     }
20     return 0;
21 }
22 
23 向量左旋算法1:"杂技"代码