算法示意图：

#include 
     
      using namespace std;struct DATA{    int id;    char name[20];};struct info{    DATA data;    info * pNext;};//头节点info * g_Head = NULL;void CreateList(){    //创建头节点    info * pHead   = new info;    if(pHead)    {        pHead->data.id  = NULL;        memset(pHead->data.name,0,10);        pHead->pNext = NULL;                g_Head = pHead;    }}void Add(int id,char * str){     info * pData   = new info;     pData->data.id = id;     strcpy(pData->data.name,str);     pData->pNext = NULL;     info * p = g_Head,*p1;     while(p)     {        p1 = p;        p = p->pNext;     }     p1->pNext = pData;}void print(){     info * p = g_Head;     while(p)     {         cout << p->data.id << " " << p->data.name << endl;         p = p->pNext;     }}int main(int argc, char* argv[]){    CreateList();    Add(1,"李大");    Add(2,"王五");    Add(3,"罗博特");    print();    getchar();    return 0;}