Can't get in to ask questions.I want to ask you a question about the return value (traversal of the graph), please give Xiaobai an answer.

      
      

       
       #include <stdio.h>
       
       

       
       #include <string.h>
       
       

       
       #include <vector>
       
       

       
       using 
       
       namespace 
       
       std;
       
       

       
       vector
       
       <
       
       int
       
       >
       
       map[
       
       30];
       
       

       
       int 
       
       visit[
       
       30][
       
       30],
       
       flag,
       
       n;
       
       

       
       int 
       
       find(
       
       int 
       
       star,
       
       int 
       
       ant)
       
       
{  
       
       
  
       
       printf(
       
       "%d %d\n",
       
       ant,
       
       n);
       
       
  
       
       if(
       
       ant
       
       ==
       
       n)
       
       
  {
       
       
    
       
       printf(
       
       "weishenme %d\n",
       
       n);
       
       //My question is here whyant已经等于n了,But did not implement the followingreturn n; 返回值却是0 
       
       
    
       
       return 
       
       n;
       
       
  }
       
       
  
       
       for(
       
       int 
       
       i
       
       =
       
       0;
       
       i
       
       <
       
       map[
       
       star].
       
       size();
       
       i
       
       ++)
       
       
  {
       
       
    
       
       if(
       
       map[
       
       star][
       
       i]
       
       &&!
       
       visit[
       
       star][
       
       i])
       
       //visit[][]Mark words that have already been judged 
       
       
    {
       
       
      
       
       visit[
       
       star][
       
       i]
       
       =
       
       1;
       
       
      
       
       ant
       
       =
       
       ant
       
       +
       
       1;
       
       
      
       
       find(
       
       map[
       
       star][
       
       i],
       
       ant);  
       
       
    }
       
       
  }
       
       
  
       
       return 
       
       0;
       
       //It feels like the value here is returned 
       
       
}
       
       

       
       int 
       
       main()
       
       
{
       
       
  
       
       int 
       
       ncase;
       
       
  
       
       char 
       
       str[
       
       35];
       
       
  
       
       scanf(
       
       "%d",
       
       &
       
       ncase);
       
       //ncase组数组 
       
       
  
       
       while(
       
       ncase
       
       --)
       
       
  {
       
       
    
       
       scanf(
       
       "%d",
       
       &
       
       n);
       
       //n个单词 
       
       
    
       
       memset(
       
       map,
       
       0,
       
       sizeof(
       
       map));
       
       
    
       
       for(
       
       int 
       
       i
       
       =
       
       0;
       
       i
       
       <
       
       n;
       
       i
       
       ++)
       
       
    {
       
       
      
       
       scanf(
       
       "%s",
       
       str);
       
       
      
       
       int 
       
       len
       
       =
       
       strlen(
       
       str);
       
       
      
       
       map[
       
       str[
       
       0]
       
       -
       
       'a'
       
       +
       
       1].
       
       push_back(
       
       str[
       
       len
       
       -
       
       1]
       
       -
       
       'a'
       
       +
       
       1);
       
       
      
       
       memset(
       
       str,
       
       0,
       
       sizeof(
       
       str));
       
       
    }
       
       
    
       
       memset(
       
       visit,
       
       0,
       
       sizeof(
       
       visit));
       
       
    
       
       printf(
       
       "%d\n",
       
       find(
       
       1,
       
       0));
       
       //结果是0 
       
       
  }
       
       
  
       
       return 
       
       0;
       
       
}
      
      
      
      

       
       
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