通讯录在通讯录（一）的基础上作了一些完善，添加了保存联系人的功能。
主要涉及的C语言重要知识点有：
文件流的操作
代码：
main.c
#include
#include "record.h"
int menu_select(void);
void hand_menu(int cmd, int *flag);
int main(int argc, char *argv[])
{
int cmd = 0;
int flag = 1;
while(1){
cmd = menu_select();
if(cmd == '0')
return 0;
hand_menu(cmd, &flag);
}
}
int menu_select(void)
{
int select;
printf(" <------通信薄-------->\n");
printf("1:添加联系人 2:删除联系人\n");
printf("3:显示所有联系人 4:保存\n");
printf("0:退出\n");
printf("请输入:\n");
select = getch();
while(select < '0'|| select>'4') {
printf("输入错误,请重新输入:\n");
select = getch();
}
return select;
}
void hand_menu(int cmd, int *flag)
{
static ADDR *list_head = NULL;
if(1 == *flag){
list_head = init_person(list_head);
*flag = 0;
}
switch(cmd){
case '1':
list_head = add_person(list_head);
break;
case '2':
list_head = del_person(list_head);
break;
case '3':
dis_person(list_head);
break;
case '4':
save_person(list_head);
break;
default:
break;
}
}
record.h
#ifndef _RECORD_H_
#define _RECORD_H_
typedef struct{
char name[8];
char tel[20];
}DATA;
typedef struct node{
DATA data;
struct node *next;
}ADDR;
#define ASK(p) do{\
p = (ADDR *)malloc(sizeof(ADDR));\
if(p==NULL){printf("malloc memory failed!");exit(-1);}\
}while(0)
#endif
opre.c
#include
#include "record.h"
#define FILE_NAME "phonebook.dat"
ADDR* add_person(ADDR *list_head)
{
ADDR *head = list_head;
ADDR *node = list_head;
ADDR *new_p;
ASK(new_p);
new_p->next = NULL;
printf("请输入姓名:");
scanf("%s", new_p->data.name);
printf("请输入电话号码:");
scanf("%s", new_p->data.tel);
if(!node){
head = new_p;
return head;
}
while(node->next)
node=node->next;
node->next = new_p;
return head;
}
ADDR *del_person(ADDR *list_head)
{
ADDR *node = list_head;
ADDR *head = list_head;
char name[8];
ADDR *pre = node;
printf("请输入要删除的名字:");
scanf("%s", name);
if(!strcmp(head->data.name, name)){
pre = head;
head = head->next;
free(pre);
return head;
}
while(node){
if(!strcmp(node->data.name, name)){
pre->next = node->next;
free(node);
printf("成功删除!\n");
return;
}
pre = node;
node = node->next;
}
printf("没有找到该名字!\n");
return head;
}
void dis_person(ADDR *list_head)
{
ADDR *node = list_head;
if(!node)
return;
printf("姓名 号码\n");
while(node){
printf("%s %s\n", node->data.name, node->data.tel);
node = node->next;
}
}
void save_person(ADDR *list_head)
{
FILE *pf;
ADDR *node = list_head;
pf = fopen(FILE_NAME, "w+");