我們再做通訊錄這個小項目的時候，前邊已經實現過靜態版本和動態版本了，今天我來實現一下文件版本的，文件版本會將你以前錄入的信息保存起來，這樣方便以後的查詢和操作。
文件版本實現起來並不難，只需在動態版本上稍作修改即可。下面是我的源碼：
"Contact.h"
#ifndef __CONTACT_H__
#define __CONTACT_H__
#include <stdio.h>
#include <string.h>
#include<stdlib.h>
enum OP
{
EXIT,
ADD,
DELE,
SER,
MODIFY,
DISPLAY,
CLEAR,
SORT
};
#define NAME_MAX 20
#define SEX_MAX 5
#define TELE_MAX 12
#define ADDR_MAX 25
#define MAX 1000
#define DEFAULT 2 //通訊錄首次的默認大小
#define MAX_INIT 2
typedef struct PerInfo
{
char name[NAME_MAX];
int age;
char sex[SEX_MAX];
char tele[TELE_MAX];
char addr[ADDR_MAX];
}PeoInfo;
typedef struct Contact
{
PeoInfo *data;
int size;
int i;
int temp;
int capacity;
}Contact,*Pcon;
void init(Pcon pcon);
void _add(Pcon pcon);
void _display(Pcon pcon);
void _del(Pcon pcon);
void _search(Pcon pcon);
void _modify(Pcon pcon);
void _sort(Pcon pcon);
void _clear(Pcon pcon);
void _destory(Pcon pcon);
void _save(Pcon pcon);
void _load(Pcon pcon);
#endif //__CONTACT_H__"Contact.c"
#include "Contact.h"
void init(Pcon pcon)
{
pcon->size = 0;
pcon->capacity = DEFAULT;
pcon->data=(PeoInfo *)malloc(MAX_INIT*sizeof(PeoInfo));
if(pcon->data == NULL)
{
printf("out of menory");
exit(EXIT_FAILURE);
}
memset(pcon->data,0,pcon->capacity*sizeof(PeoInfo));
_load(pcon);
}
void _rise(Pcon pcon) //增大容量
{
PeoInfo *temp = (PeoInfo *)realloc(pcon->data,(pcon->capacity+MAX_INIT)*sizeof(PeoInfo));
if(temp == NULL)
{
printf("out of memory!\n");
exit(0);
}
else
pcon->data = temp;
}
void _dela(Pcon pcon) //減小容量
{
PeoInfo *temp = (PeoInfo *)realloc(pcon->data,(pcon->capacity-MAX_INIT)*sizeof(PeoInfo));
if(temp == NULL)
{
printf("電話本已空！\n");
return ;
}
else
pcon->data = temp;
}
void _destory(Pcon pcon)
{
if(pcon->data != NULL)
{
free(pcon->data);
pcon->data = NULL;
}
}
void _add(Pcon pcon)
{
PeoInfo *temp = NULL;
if(pcon->size == pcon->capacity)
{
_rise(pcon);
}
printf("請輸入名字：>");
scanf("%s",pcon->data[pcon->size].name);
printf("請輸入年齡：>");
scanf("%d",&(pcon->data[pcon->size].age));
printf("請輸入性別：>");
scanf("%s",pcon->data[pcon->size].sex);
printf("請輸入電話：>");
scanf("%s",pcon->data[pcon->size].tele);
printf("請輸入地址：>");
scanf("%s",pcon->data[pcon->size].addr);
pcon->size++;
printf("添加成功\n");
}
void _display(Pcon pcon)
{
int i = 0;
printf("%9s\t%3s\t%4s\t%11s\t%10s\n","name","age","sex","tele","addr");
for(i = 0;i<pcon->size;i++)
{
printf("%9s\t%3d\t%4s\t%11s\t%10s\n",
pcon->data[i].name,
pcon->data[i].age,
pcon->data[i].sex,
pcon->data[i].tele,
pcon->data[i].addr);
}
}
static int find(Pcon pcon, char *name)
{
int i = 0;
for(i = 0;i<pcon->size; i++)
{
if(strcmp(pcon->data[i].name,name) == 0)
{
return i;
}
}
return -1;
}
void _del(Pcon pcon)
{
int pos = 0;
int index = 0;
char name[NAME_MAX];
if(pcon->size == 0)
{
printf("電話本空\n");
return;
}
printf("請輸入要刪除人的名字:>");
scanf("%s",name);
pos = find(pcon, name);
if(pos == -1)
{
printf("找不到要刪除的人\n");
return;
}
//
for(index = pos; index < pcon->size; index++)
{
pcon->data[index] = pcon->data[index+1];
}
pcon->size--;
printf("刪除成功\n");
_dela(pcon);
}
void _search(Pcon pcon)
{
char name[NAME_MAX] = {0};
int pos = 0;
printf("請輸入要查找人的名字:>");
scanf("%s",name);
pos = find(pcon, name);
if(pos == -1)
{
printf("指定聯繫人不存在\n");
return;
}
else
{
printf("%9s\t%3s\t%4s\t%11s\t%10s\n","name","age","sex","tele","addr");
printf("%9s\t%3d\t%4s\t%11s\t%10s\n",
pcon->data[pos].name,
pcon->data[pos].age,
pcon->data[pos].sex,
pcon->data[pos].tele,
pcon->data[pos].addr);
}
}
void _modify(Pcon pcon)
{
char name[NAME_MAX] = {0};
int pos = 0;
printf("請輸入要修改人的名字:>");
scanf("%s",name);
pos = find(pcon, name);
if(pos == -1)
{
printf("指定聯繫人不存在\n");
return;
}
else
{
printf("請輸入名字：>");
scanf("%s",pcon->data[pos].name);
printf("請輸入年齡：>");
scanf("%d",&(pcon->data[pos].age));
printf("請輸入性別：>");
scanf("%s",pcon->data[pos].sex);
printf("請輸入電話：>");
scanf("%s",pcon->data[pos].tele);
printf("請輸入地址：>");
scanf("%s",pcon->data[pos].addr);
}
}
void _sort(Pcon pcon)
{
int i = 0;
int j = 0;
PeoInfo temp = {0};
for(i = 0;i<pcon->size-1; i++)//控制排序趟數
{
for(j = 0; j<pcon->size-1-i; j++)
{
if(strcmp(pcon->data[j].name,pcon->data[j+1].name) > 0)
{
temp = pcon->data[j];
pcon->data[j] = pcon->data[j+1];
pcon->data[j+1] = temp;
}
}
}
}
void _clear(Pcon pcon)
{
pcon->size = 0;
}
void _save(Pcon pcon) //寫入文件
{
int i = 0;
FILE *pfWrite = fopen("contact.txt","w"); //打開一個文件
if(pfWrite == NULL)
{
perror("open file for write");
exit(0);
}
else
{
for(i=0; i<pcon->size; i++)
{
fwrite(&(pcon->data[i]),sizeof(PeoInfo),1,pfWrite);
}
fclose(pfWrite);
}
}
void _load(Pcon pcon) //加載文件內容
{
int i = 0;
PeoInfo temp = {0};
FILE *pfRead = fopen("contact.txt","r");
if(pfRead == NULL)
{
perror("open file for read");
exit(0);
}
while(fread(&temp,sizeof(PeoInfo),1,pfRead))
{
_rise(pcon);
pcon->data[i] = temp;
i++;
pcon->size++;
}
}"test.c"
#include "Contact.h"
void menu()
{
printf("***************************\n");
printf("********* 1.add ***********\n");
printf("********* 2.del **********\n");
printf("********* 3.search ********\n");
printf("********* 4.modify ********\n");
printf("********* 5.display *******\n");
printf("********* 6.clear *********\n");
printf("********* 7.sort **********\n");
printf("********* 0.exit **********\n");
printf("***************************\n");
}
int main()
{
int input = 1;
Contact pcon;
init(&pcon);
while(input)
{
menu();
printf("請選擇要操作的數字：");
scanf("%d",&input);
printf("\n");
{
switch(input)
{
case ADD:
_add(&pcon);
break;
case DELE:
_del(&pcon);
break;
case SER:
_search(&pcon);
break;
case MODIFY:
_modify(&pcon);
break;
case DISPLAY:
_display(&pcon);
break;
case CLEAR:
_clear(&pcon);
break;
case SORT:
_sort(&pcon);
break;
case EXIT:
_save(&pcon);
_destory(&pcon);
break;
default:
printf("無效選擇!");
break;
}
}
}
system("pause");
return 0;
}
至此，文件版本就實現完成。