判断可不可以左旋得到字符串

判断可不可以左旋得到字符串

#include<stdio.h>

#include<string.h>

#include<assert.h>

int is_left_move(char* a,char* b)

{

       assert(a);

       assert(b);

       int len = strlen(a);

       strncat(a, a, len);

       char* p = strstr(a, b);

       if (p) return 1;

       else return 0;

}

int main()

{

       char a[30] = "abcdefg";

       char b[] = "cdefgab";

       int ret=is_left_move(a,b);

       if (ret == 1) printf("yes\n");

       else printf("no\n");

       return 0;

}