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/*************************************************************************> File Name: singleLineTable.c> Author: zshh0604> Mail: zshh0604@.com > Created Time: 2014年10月15日 星期三 11时34分08秒************************************************************************/#include<stdio.h>
#include<stdlib.h>
#include<string.h>/**** 循环单链表。 * * 学生结构体:* id: 学生编号* name:学生姓名* math:分数* next:指向下一个学生结构体*/
typedef struct student {int id; char name[20];int math;struct student * next;
}stu;typedef int cmp_stu(const void * ,const void *);/***** 函数功能:* 创建一个头节点。* 函数参数:* void.* 函数的返回值:* 返回头节点指针。*/
stu * create(void)
{stu *head = NULL;stu *p = NULL;stu *new = NULL;int tmpId = 0 ;char tmpName[20];int tmpMath; head =(stu*) malloc(sizeof(stu));if(head == NULL){printf("分配stu地址空间失败!!!\n");return NULL;}head->id = 0; strncpy(head->name,"\0"); head->math = 0; // head->next = NULL; //单链表head->next = head; //有头循环单链表 p = head; //当头创建出来之后应该将指针指向该头部。while(1){new = (stu*) malloc(sizeof(stu));if(new==NULL){printf("malloc new error\n"); return NULL;}tmpId++;if(tmpId == 3){break;}new->id = tmpId;printf("\nname=");scanf("%s",tmpName);strncpy(new->name,tmpName,20);printf("math=");scanf("%d",&tmpMath);new->math = tmpMath;p->next = new; p = new;//new ->next = NULL; //单链表new->next = head; //有头循环单链表}return head;
}/**** 函数功能:* 打印输出单链表中的数据。* 函数参数:* head 是链表的头。* 返回值:* 没有返回值*/
void printf_list(stu *head)
{stu *tmp = NULL;int i = 0;if(head== NULL){return;}tmp = head->next;
#if 1 //有头循环单链表 while(tmp!=head){ i++;printf("name = %s\n",tmp->name);printf("math = %d\n",tmp->math);tmp = tmp->next;}
#elsewhile(tmp!=NULL) //单链表{ i++;printf("name = %s\n",tmp->name);printf("math = %d\n",tmp->math);tmp = tmp->next;#endifprintf("len = %d\n",i);
}
/****** 函数功能:* 比较函数。* 函数参数:** 函数返回值:* 返回0表示成功。* 返回1表示失败? * */
int cmp(const void * data, const void * key)
{stu * head = NULL;int * tmpkey =NULL;head = (stu*) data;tmpkey=(int*)key;//printf("head->id = %d, tmpkey = %d",((stu*)data)->id, *tmpkey);if(head->id == *tmpkey){return 0;}return 1;
}/****** 函数功能:* 查找一个节点中的数据。* 函数参数:* * 函数返回值:* 返回0查找成功,返回1查找失败。*/
void * find_stu(stu* head,cmp_stu* cmps, const void *key)
{stu * tmp = NULL;tmp = head->next;if(key == NULL){return NULL;}#if 1 //循环单链表if(cmps((const void *)head, (const void *)key) == 0){printf("name = %s\n",tmp->name);printf("math = %d\n",tmp->math);return tmp;}while(tmp != head){if (cmps((const void *) tmp,(const void * )key)==0){printf("name = %s\n",tmp->name);printf("math = %d\n",tmp->math);return tmp;}tmp = tmp->next;}
#else //单链表while(tmp != NULL){if (cmps((const void *) tmp,(const void * )key)==0){printf("name = %s\n",tmp->name);printf("math = %d\n",tmp->math);return tmp;}tmp = tmp->next;
#endifreturn NULL;
}/**** 函数功能:* 插入节点。* 函数参数:* head:链表中的节点。* new:需要插入的节点。* 函数的返回值:* 返回0表示插入成功。* 返回1表示插入失败。*/
int insert_tool(stu* head, stu* new)
{if(head==NULL||new == NULL){return 1;}
#if 1 //循环单链表 if(head->next == head){head->next = new;new->next = head;}
#else //单链表if(head->next == NULL){head->next = new;new->next = NULL;}
#endifnew->next = head->next;head->next = new;return 0;
}/**** 函数功能:* 根据名称进行比较。* 函数参数:* data数据,key为要查数据中查找的值。 * 函数的返回值:* 返回0成功。返回1失败。*/
int cmp_name(const void *data, const void *key)
{stu *tmp = NULL;char *tmpName = NULL;if(data== NULL || key == NULL){return 1;} tmp =(stu *) data;tmpName =(char *) key;if(strncmp(tmp->name,tmpName, 20)==0){return 0;}return 1;
}/***** 函数功能:* 插入一个节点到链表中。 * 函数参数:* head:链表的头节点。* name :要查看的节点的名称。* 函数返回值:* 返回0插入成功。* 返回1插入失败。*/
int insert_stu(stu* head,char *name)
{ stu * tmp = NULL;stu * new = NULL;char tmpName[20];int tmpMath;tmp = (stu *)find_stu(head,cmp_name,name);if(tmp == NULL){printf("没有找到该同学\n");return 1;}new = (stu*) malloc(sizeof(stu));printf("name="); scanf("%s",tmpName);strncpy(new->name,tmpName,20);printf("math=");scanf("%d", &tmpMath);new->math = tmpMath;new->id = 10; insert_tool(tmp,new);return 0;
}/***函数功能:* 删除制定的节点。*参数:* head:链表的头* name:要删除学生的名字。*返回值。* 0 返回成功。1返回失败。*/
int delete_stu(stu * head,char *name)
{stu * back = NULL;stu * p = NULL;p = head->next;
#if 1 //循环单链表 if(strcmp(p->name,name)==0){head->next = p->next;p->next = NULL;free(p);return 0;}while(p != head){back = p; p = p->next; if(strcmp(p->name,name) == 0){back->next = p->next;p->next = NULL;free(p);return 0;}}#else //单链表while(p!=NULL){back = p; p = p->next; if(strcmp(p->name,name) == 0){back->next = p->next;p->next = NULL;free(p);return 0;} #endifreturn 1;
}
/**** 函数功能:* 销毁链表。* 函数的参数:* 链表的头。* 函数的返回值* 0表示返回成功。1表示返回失败。*/int destory_list(stu* head)
{stu *tmp; stu *p;p = head->next; while(p!=head){ tmp = p; p = p->next;tmp->next = NULL;printf("name = %s", tmp->name);free(tmp);}}int main(void)
{int i = 2;stu * head = NULL;head = create();printf_list(head);find_stu(head,cmp,&i);insert_stu(head,"bb");printf_list(head);printf("----------------------\n");destory_list(head);head = NULL;printf_list(head);printf("---------------------\n");
}
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