将新节点插入到环形链表中

 #include <iostream>

    
 #include <cstdlib>
    
 #include <ctime>
    
 #include <string.h> 
    
 #include <iomanip>
    
 using namespace std;
    
 class list
    
 {   
    
     public:
    
 	int num,score;
    
 	char name[10];
    
 	class list *next;
    
 };
    
 typedef struct list node;
    
 typedef node *link;
    
  
    
 link findnode(link head,int num)
    
 {
    
      link ptr;
    
      ptr=head;
    
      while(ptr!=NULL)
    
      {
    
     if(ptr->num==num)
    
        return ptr;
    
     ptr=ptr->next;
    
      }
    
      return ptr;
    
 }