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