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 int vec_rotate(char *vec,int rotdist, int length) {
 int i,j,k,times;
 char t;
 times = gcd(rotdist,length);
  printf("%d\n",times);
 for(i=;i<times;i++) {
  t = vec[i];
   j = i;
    while() {
  k = j+ rotdist;
  if(k>=length)
   k-=length;
  if(k==i)
 break;
  vec[j] = vec[k];
 j = k;
 }
  vec[j]=t;
     }
     return ;
 }

 向量左旋算法1:"杂技"代码

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