prmbac4f6/Contact.c

#define _CRT_SECURE_NO_WARNINGS 1
#include "Contact.h"
 
void* check_capacity(pContact pc)//增容 
{
	assert(pc);
	if (pc->sz == pc->capacity)//判断是否增容
	{
		PeoInfo *tmp = realloc(pc->data, (pc->capacity + 2)*sizeof(PeoInfo));    //data改变内存， 新的大小 
		if (tmp != NULL)   //如果需要改变内存则执行 
		{
			pc->data = tmp;
			pc->capacity += 2;
			return pc->data;
		}
		else
		{
			return NULL;
		}
	}
}
  
 
void LoadContact(pContact pc)   	//读取--加载内存
{
	PeoInfo tmp = { 0 };
	FILE* pf = fopen("contact.dat", "rb");
	int i = 0;
	if (pf == NULL)
	{
		perror("open file for read");
		exit(EXIT_FAILURE);
	}
	while (fread(&tmp, sizeof(PeoInfo), 1, pf))  //从一个文件流中读数据
	{
		if (check_capacity(pc) != NULL)
		{
			pc->data[pc->sz] = tmp;
			pc->sz++;
		}
	}
	fclose(pf);
	pf = NULL;
}

void InitContact(pContact pc)  //初始化 
{
	assert(pc);
	pc->sz = 0;
	pc->data = (PeoInfo*)malloc(3 * sizeof(PeoInfo));//分配空间 
	pc->capacity = DEFAULT_SZ;
	//加载文件信息
	LoadContact(pc);
}
void DestroyContact(pContact pc)//释放动态内存开辟的空间
{
	assert(pc);
	free(pc->data);
	pc->data = NULL;
	pc->capacity = 0;
	pc->sz = 0;
}
 
 
void AddContact(pContact pc)   	//添加信息
{
	assert(pc);
	if (check_capacity(pc) == NULL)
	{
		return;
	}
	printf("请输入名字:>");
	scanf("%s", pc->data[pc->sz].name);
	printf("请输入年龄:>");
	scanf("%d", &(pc->data[pc->sz].age));
	printf("请输入性别:>");
	scanf("%s", pc->data[pc->sz].sex);
	printf("请输入电话:>");
	scanf("%s", pc->data[pc->sz].tele);
	printf("请输入地址:>");
	scanf("%s", pc->data[pc->sz].addr);
	pc->sz++;
}

void ShowContact(pContact pc)    //显示联系人信息
{
	assert(pc);
	int i = 0;
	printf("%10s\t%4s\t%5s\t%12s\t%20s\n", "name","age","sex","tele","addr");
	for (i = 0; i < pc->sz; i++)
	{
		printf("%10s\t%4d\t%5s\t%12s\t%20s\n",
			pc->data[i].name,
			pc->data[i].age,
			pc->data[i].sex,
			pc->data[i].tele,
			pc->data[i].addr);
	}
}
 
int FindEntry(pContact pc, char name[])  //建立函数搜素联系人 判断是否存在 
{
	int i = 0;
	assert(pc);
	for (i = 0; i < pc->sz; i++)
	{
		if (strcmp(pc->data[i].name, name) == 0)   //比较字符是否相同确定联系人是否存在 
		{
			return i;
		}
	}
	return -1;//代表没找到联系人 
}
 
void DelContact(pContact pc)  //删除联系人 
{
	assert(pc);
	char name[NAME_MAX] = { 0 };
	int i = 0;
	int j = 0;
	int pos = 0;
	if (pc->sz == 0)   //判断是否为空通讯录 
	{
		printf("通讯录已空，无法删除\n");
		return;
	}
	printf("请输入要删除人的名字>:");	//1.查找
	scanf("%s", name);
	pos=FindEntry(pc, name);  //判断要找的人是否存在 
	if (pos!= -1)	//2.删除
	{
		for (j = pos; j < pc->sz - 1; j++)   //找到位置后 覆盖前一个人的数据即移位 
		{
			pc->data[j] = pc->data[j + 1];
		}
		pc->sz--;
		printf("删除成功\n");
	}
	else
	{
		printf("要删除的人不存在\n");
	}
}
 
void SearchContact(pContact pc)   //查找联系人 
{
	assert(pc);
	char name[NAME_MAX] = { 0 };
	int pos = 0;
	printf("请输入要查找的名字>:");
	scanf("%s", name);
	pos=FindEntry(pc, name);   //判断是否存在 
	if (pos == -1)
	{
		printf("要查找的人不存在\n");
	}
	else
	{
		printf("%10s\t%4s\t%5s\t%12s\t%20s\n", "name", "age", "sex", "tele", "addr");
		printf("%10s\t%4d\t%5s\t%12s\t%20s\n",
			pc->data[pos].name,
			pc->data[pos].age,
			pc->data[pos].sex,
			pc->data[pos].tele,
			pc->data[pos].addr);
	}
}
void ModifyContact(pContact pc)  //修改信息 
{
	assert(pc);
	char name[NAME_MAX] = { 0 };
	int pos = 0;
	printf("请输入要修改人的名字>:");
	scanf("%s", name);
	pos = FindEntry(pc, name);
	if (pos == -1)
	{
		printf("要修改的人不存在\n");
	}
	else
	{
	
		printf("请输入名字:>");
		scanf("%s", pc->data[pos].name);
		printf("请输入年龄:>");
		scanf("%d", &(pc->data[pos].age));
		printf("请输入性别:>");
		scanf("%s", pc->data[pos].sex);
		printf("请输入电话:>");
		scanf("%s", pc->data[pos].tele);
		printf("请输入地址:>");
		scanf("%s", pc->data[pos].addr);
	}
}

void EmptyContact(pContact pc)  //清空联系人 
{
	pc->sz = 0;
	printf("通讯录已清空\n");
}
 
void SaveContact(pContact pc)  //存储信息 //写文件
{
	FILE* pf = fopen("contact.dat", "wb");
	int i = 0;
	if (pf == NULL)
	{
		perror("open file for write");
		exit(EXIT_FAILURE);
	}
	for (i = 0; i < pc->sz; i++)  //写文件
	{
		fwrite(pc->data + i, sizeof(PeoInfo), 1, pf);
	}
	fclose(pf);
	pf = NULL;
 
}