C語言通訊錄

主要目的是練習一下動态開辟記憶體和檔案讀寫

contact.h

#pragma once
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include <malloc.h>
#include<iostream>
using namespace std;

#define M 20
//人的資訊
struct People
{
	char name[M];
	char sex[M];
	char address[M];
	long long number;
};
//通訊錄
struct Contact
{
	int sz;//目前People數組的下标
	struct People* a = NULL; //動态開辟
	int capacity;//初始化容量為2
};

struct Contact* init(struct Contact* p);//初始化

void load(struct Contact* p);//加載檔案内容

void preserve(struct Contact* p);//儲存檔案内容

void Show(struct Contact* p);///列印通訊錄

void Add(struct Contact* p);//添加使用者


bool Check_Size(struct Contact* p);//檢查通訊錄的擴容

void Del(struct Contact* p);//删除使用者

void Modify(struct Contact* p);//修改使用者資訊

int Search(struct Contact* p);///查找某使用者資訊
           

contact.cpp

#include "contact.h"

struct Contact* init(struct Contact* p)
{
	struct Contact* t = (struct Contact*)malloc(sizeof(Contact));
	if (!t){
		perror("init");
	}
	p = t;
	p->sz = 0;
	p->capacity = 2;
	struct People* tmp = (struct People*)malloc(2 * sizeof(People));
	if (!tmp) {
		perror("init");
	}
	p->a = tmp;
	return p;
}

void load(struct Contact* p)
{
	FILE* f = fopen("contact.txt", "r");
	if (!f) {
		perror("FILE\n");
	}
	while (Check_Size(p) && fscanf(f, "%s%s%s%lld", p->a[p->sz].name, p->a[p->sz].sex, p->a[p->sz].address, &((p->a)[p->sz].number) ) != EOF )
	{
		p->sz++;
	}
	fclose(f);
	f = NULL;
}

void preserve(struct Contact* p)
{
	FILE* f = fopen("contact.txt", "w");
	for (int i = 0; i < p->sz; i++)
	{
		fprintf(f,"%s %s %s %lld\n", p->a[i].name, p->a[i].sex, p->a[i].sex,p->a[i].number);
	}
	fclose(f);
	f = NULL;
}

void Show(struct Contact* p)
{
	printf("%10s\t%10s\t%10s\t%10s\t\n", "姓名", "性别","位址","電話");
	for (int i = 0; i < p->sz; i++)
	{
		printf("%10s\t%10s\t%10s\t%10lld\t\n", p->a[i].name, p->a[i].sex, p->a[i].address, p->a[i].number);
	}printf("\n");
}

void Add(struct Contact* p)
{
	Check_Size(p);//檢查目前是否已經滿了
	printf("請輸入姓名\n"); scanf("%s", p->a[p->sz].name);
	printf("請輸入性别\n"); scanf("%s", p->a[p->sz].sex );
	printf("請輸入位址\n"); scanf("%s", p->a[p->sz].address);
	printf("請輸入電話\n"); scanf("%lld", &((p->a)[p->sz].number));
	(p->sz)++;
}

bool Check_Size(struct Contact* p)
{
	if (p->sz == p->capacity)
	{
		struct People* tmp = (struct People*)realloc(p->a, ( p->capacity + 10) * sizeof(struct People) );
		if (!tmp)
		{
			perror("Check_Size");
		}
		p->a = tmp;
		p->capacity += 10;
	}
	return true;
}

void Del(struct Contact* p)//通過名字來查找删除
{
	int pos = Search(p);
	if (pos == -1)
	{
		printf("未找到該聯系人\n");
		return;
	}
	for (int i = pos; i+1 < p->sz; i++)
	{
		memmove(p->a + i, p->a + i + 1, sizeof(People));
	}
	printf("已經删除查找到的聯系人\n");
	p->sz--;///減小size
}

void Modify(struct Contact* p)
{
	int pos = Search(p);
	if (pos == -1)
	{
		printf("未找到該聯系人\n");
		return;
	}
	printf("請輸入姓名\n"); scanf("%s", p->a[pos].name);
	printf("請輸入性别\n"); scanf("%s", p->a[pos].sex);
	printf("請輸入位址\n"); scanf("%s", p->a[pos].address);
	printf("請輸入電話\n"); scanf("%lld", &((p->a)[pos].number));
	printf("修改成功\n");
}

int Search(struct Contact* p)
{
	char str[M] = { 0 };
	printf("請輸入姓名\n"); scanf("%s", str);
	int pos = -1;
	for (int i = 0; i < p->sz; i++)
	{
		if (strcmp(str, p->a[i].name) == 0)
		{
			printf("%10s\t%10s\t%10s\t%10lld\t\n", p->a[i].name, p->a[i].sex, p->a[i].address, p->a[i].number);
			
			do {
				printf("是否找到該聯系人?1(yes):0(no)\n");
				int op;
				scanf("%d", &op);
				if (op == 1)
				{
					pos = i;
					break;
				}
				else if (op == 0)
				{
					break;
				}
				else {
					printf("輸入錯誤\n");
				}
			} while (1);
		}
	}
	return pos;
}


           

test.cpp

#include "contact.h"
void menu()
{
	printf("****************1.add	 2.del****************\n");
	printf("****************3.modify 4.search*************\n");
	printf("****************5.show   0.Exit***************\n");
}
enum Option
{
	Exit = 0,
	add = 1,
	del = 2,
	modify = 3,
	search = 4,
	show = 5
};
int main()
{
	struct Contact* pa = NULL;
	pa = init(pa);
	load(pa);
;	do {
		menu();
		int input;
		scanf("%d", &input);
		switch (input)
		{
		case Exit:
			preserve(pa);
			return 0;
			break;
		case add:
			Add(pa);
			break;
		case del:
			Del(pa);
			break;
		case modify:
			Modify(pa);
			break;
		case search:
			Search(pa);
			break;
		case show:
			Show(pa);
			break;
		default:
			printf("輸入有誤\n");
			break;
		}
	} while (1);
	return 0;
}