C语言实现电话本 动态开辟 信息存储于文件

下面是我用C写的一个电话本小项目，实现的功能有：添加 删除 修改 查找 排序 清空 显示，功能还是比较全的，内存也是动态开辟的。能存储于本地，能从本地读出并显示

头文件部分代码，contact.h：

#include<stdio.h>
#include<windows.h>
#include<stdlib.h>
#pragma warning(disable:4996) 
 
#define MAX_NAME 10
#define MAX_TEL 12
#define MAX_ADDR 20
#define MAX_SEX 5
#define MAX 1000
#define CAPACITY  3
#define FILENAME "contact.txt"
 
typedef struct P
{
	char name[MAX_NAME];
	char sex[MAX_SEX];
	int  age;
	char tel[MAX_TEL];
	char addr[MAX_ADDR];
 
}P;
 
typedef struct Con
{
	P* contact;  //联系人信息
	int len;//联系人数量
	int capacity;  //容量
 
}Con, *pCon;
 
void init_mycon();
void add_mycon();
void del_mycon();
void search_mycon();
void mod_mycon();
void dis_mycon();
void clear_mycon();
void sort_mycon();
void exit_mycon();

　

程序部分，contact.c 部分代码：

 #include"contact.h"
 
 void load(pCon _con)
 {
     int i = ;
     FILE* fp = fopen(FILENAME, "r");
     if (fp == NULL)
     {
         perror("open the FILENAME for read\n");
         exit(EXIT_FAILURE);
     }
 
       fscanf(fp, "%d", &(_con->len));
     while (_con->len >= _con->capacity)
     {
         P* cp = (P*)realloc(_con->contact, (_con->capacity + CAPACITY)*sizeof(P));
         if ((cp != _con->contact) && (cp != NULL))
         {
             _con->contact = cp;
         }
         _con->capacity += CAPACITY;
     }
 
     for (i = ; i < _con->len; i++)
     {
         fscanf(fp, "%s%s%d%s%s", _con->contact[i].name, _con->contact[i].sex, &(_con->contact[i].age),
             _con->contact[i].tel, _con->contact[i].addr);
     }
     fclose(fp);
 }
 
 void init_mycon(pCon _con)
 {
     _con->len = ;
     _con->contact = (P*)malloc(CAPACITY * sizeof(P));
     if (_con->contact == NULL)
     {
         perror("创建空间");
         exit(EXIT_FAILURE);
     }
     memset(_con->contact, , CAPACITY);
     _con->capacity = CAPACITY;
     load(_con);
 }
 
 int findpeo(pCon _con, char* name)
 {
     int i = ;
     for (i = ; i < _con->len; i++)
     {
         if (strcmp(name, _con->contact[i].name) == )
         {
             return i;
         }
     }
     return -;
 }
 
 void add_mycon(pCon _con)
 {
     load(_con);
     while(_con->len >= _con->capacity)
     {
         P* cp = realloc(_con->contact,(_con->capacity + CAPACITY)*sizeof(P));
         if ((cp != _con->contact) && (cp != NULL))
         {
             _con->contact = cp;
         }
         _con->capacity += CAPACITY;
     }
 
     printf("请输入姓名:");
     scanf("%s",_con->contact[_con->len].name);
     printf("请输入性别:");
     scanf("%s",_con->contact[_con->len].sex);
     printf("请输入年龄:");
     scanf("%d",&(_con->contact[_con->len].age));
     printf("请输入电话号码:");
     scanf("%s",_con->contact[_con->len].tel);
     printf("请输入地址:");
     scanf("%s",_con->contact[_con->len].addr);
 
     _con->len++;
     printf("添加成功\n");
 }
 
 void dis_mycon(pCon _con)
 {
     int i = ;
     if (_con->len == )
     {
         printf("无联系人\n");
         return;
     }
     printf("%10s\t%3s\t%3s\t%12s\t%10s\n", "name", "sex", "age", "tel", "addr");
     for (i = ; i < _con->len; i++)
     {
         printf("%10s\t%3s\t%3d\t%12s\t%10s\n", _con->contact[i].name,
             _con->contact[i].sex, _con->contact[i].age,
             _con->contact[i].tel, _con->contact[i].addr);
     }
 }
 
 void del_mycon(pCon _con)
 {
     char name[MAX_NAME] = {  };
     int set = ,i = ;
     if (_con->len == )
     {
         printf("电话薄为空\n");
         return;
     }
     printf("输入想删掉人的姓名：");
     scanf("%s", name);
     set=findpeo(_con,name);
     if (set == -)
     {
         printf("联系人不存在\n");
         return;
     }
     for (i = set; i < _con->len-; i++)
     {
         _con->contact[i] = _con->contact[i + ];
     }
     _con->len--;
     printf("删除成功\n");
 }
 
 void search_mycon(pCon _con)
 {
     char name[MAX_NAME] = {  };
     int i = ;
     int set = ;
     printf("请输入要查找人的姓名：");
     scanf("%s", name);
     set = findpeo(_con, name);
     if (set == -)
     {
         printf("联系人不存在\n");
         return;
     }
     printf("%10s\t%3s\t%3s\t%12s\t%10s\n", "name", "sex", "age", "tel", "addr");
     printf("%10s\t%3s\t%3d\t%12s\t%10s\n", _con->contact[i].name,
             _con->contact[i].sex, _con->contact[i].age,
             _con->contact[i].tel, _con->contact[i].addr);
 }
 
 void mod_mycon(pCon _con)
 {
     char name[MAX_NAME] = {  };
     char nname[MAX_NAME] = {  };
     char nsex[MAX_SEX] = {};
     char ntel[MAX_TEL] = {};
     char naddr[MAX_ADDR] = {};
 
     int input = , choice = ;
     int set = ;
     if (_con->len == )
     {
         printf("没有可修改的信息\n");
         return;
     }
     printf("请输入要修改人的姓名：");
     scanf("%s", name);
     set = findpeo(_con, name);
     if (set == -)
     {
         printf("联系人不存在\n");
         return;
     }
     else
     {
         printf("1.修改姓名   2.修改性别   3.修改年龄\n");
         printf("4.修改电话   5.修改地址   0.保存并退出\n");
         while (input)
         {
             printf("请选择:");
             scanf("%d", &choice);
             switch(choice)
             {
             case :
                 {
                     printf("请输入新的姓名：");
                     scanf("%s", nname);
                     strcpy(_con->contact[set].name, nname);
                     break;
                 }
             case :
                 {
                     printf("请输入新的性别：");
                     scanf("%s", nsex);
                     strcpy(_con->contact[set].sex , nsex);
                     break;
                 }
             case :
                {
                       printf("请输入新的年龄：");
                       scanf("%d", &_con->contact[set].age);
                       break;
                }
             case :
               {
                       printf("请输入新的电话：");
                       scanf("%s", ntel);
                       strcpy(_con->contact[set].tel, ntel);
                       break;
               }
             case :
                {
                       printf("请输入新的地址：");
                       scanf("%s", naddr);
                       strcpy(_con->contact[set].addr, naddr);
                       break;
                }
             case :
                {
                       input = ;
                       break;
                }
             default:
                 break;
             }
         }
     }
 }
 int _compare(const void* cp1, const void* cp2)
 {
     P* p1= (P*)(cp1);
     P* p2 = (P*)(cp2);
     if (strcmp(p1->name, p2->name) > )
         return ;
     else
         return -;
 }
 
 void sort_mycon(pCon _con)
 {
     P* cp = _con->contact;
     int i = ;
 
     if (_con->len == )
     {
         printf("电话本为空\n");
         return;
     }
     qsort(_con->contact, _con->len, sizeof(P),_compare);
     printf("排序成功:\n");
 }
 
 void clear_mycon(pCon _con)
 {
     _con->len = ;
     printf("清除成功\n");
 }
 
 void exit_mycon(pCon _con)
 {
     int i = ;
     FILE* fp = fopen(FILENAME, "w");
     _con->capacity = _con->len;
     if (NULL == fp)
     {
         perror("open the FILENAME for write");
         exit(EXIT_FAILURE);
     }
     fprintf(fp, "%d ", _con->len);
     for (i = ; i < _con->len; i++)
     {
         fprintf(fp, "%s %s %d %s %s ", _con->contact[i].name, _con->contact[i].sex, _con->contact[i].age,
             _con->contact[i].tel, _con->contact[i].addr);
     }
 
     fclose(fp);
 }

运用了fprintf和fscanf两个函数，向本地文件中以文本形式写入和从本地文件中读出。

测试部分代码，test.c：

 #include"contact.h"
 
 enum OP
 {
     EXIT,
     ADD,
     DEL,
     SERCH,
     MOD,
     SORT,
     DIS,
     CLEAR
 };
 
 void menu()
 {
     printf("*******************************************\n");
     printf("**********     电话本        *************\n");
     printf("********  1.add      2.del      ***********\n");
     printf("********  3.serch    4.mod      ***********\n");
     printf("********  5.sort     6.dis     ***********\n");
     printf("********  7.clear    0.exit     ***********\n");
     printf("*******************************************\n");
 }
 
 int main()
 {
     int input = ;
     Con mycon;
     init_mycon(&mycon);
     while (input)
     {
         menu();
         printf("选择操作：");
 
         scanf("%d",&input);
         switch (input)
         {
         case ADD:
             add_mycon(&mycon);
             break;
         case DEL:
             del_mycon(&mycon);
             break;
         case SERCH:
             search_mycon(&mycon);
             break;
         case MOD:
             mod_mycon(&mycon);
             break;
         case SORT:
             sort_mycon(&mycon);
             break;
         case DIS:
             dis_mycon(&mycon);
             break;
         case CLEAR:
             clear_mycon(&mycon);
             break;
         case EXIT:
             exit_mycon(&mycon);
             break;
         default:
             break;
         }
     }
 
     system("pause");
     return ;
 }