关于通讯录的实现

涉及动态内存的开辟

结构体的声明

指针的传参应用

代码如下

头文件

#pragma once
#define _CRT_SECURE_NO_WARNINGS
#define NAME 20
#define PHONE 20
#define ADDRESS 50
struct Person {
	char name[NAME];
	char sex;
	int age;
	char phoneNum[PHONE];
	char address[ADDRESS];
	char flag;   //标记，=1表示人被删除
}*ppsn;
void add_person(struct Person * ppsn);   //增加一个人
void del_person(struct Person * ppsn);   //删除指定人
void find_person(struct Person * ppsn);     //寻找指定人
void update(struct Person * ppsn);      //更新人信息
void show_all(struct Person * ppsn);    //显示所有人
void clear();                       //清空所有人
void sort_by_name(struct Person * ppsn);    //按名排序
void init(int size);        //初始化

引用

#include "add_list.h"
#include <stdio.h>
#include <stdlib.h>
//通讯录目前总人数
int sumCount = 0;
//动态开辟的大小
int sizeOfAdd = 0;
void init(int size)
{
	sizeOfAdd = size;
	ppsn = NULL;
	ppsn = (struct Person *)malloc(size * sizeof(struct Person));
}
void clear() {
	free(ppsn);
	ppsn = (struct Person *)malloc(sizeOfAdd * sizeof(struct Person));
	if (ppsn == NULL) {
		printf("清空失败");
	}
}
void add_person(struct Person * ppsn)
{
	ppsn += sumCount;
	if (ppsn != NULL) {
		printf("Please Enter Name: ");
		scanf("%s", ppsn->name);
		printf("Please Enter Sex: ");
		scanf(" %c", &(ppsn->sex));
		printf("Please Enter Age: ");
		scanf(" %u", &(ppsn->age));
		printf("Please Enter Tel: ");
		scanf(" %s", ppsn->phoneNum);
		printf("Please Enter Addr: ");
		scanf(" %s", ppsn->address);
		ppsn->flag = 0;
		sumCount += 1;
	}
}
void del_person(struct Person * ppsn)
{
	char name[NAME];
	printf("请输入删除人的姓名\n");
	scanf("%s", name);
	if (ppsn == NULL) {
		return;
	}
	int count = sumCount;
	for (; ppsn != NULL&&count; count--, ppsn++) {
		if (strcmp(ppsn->name, name) == 0 && !(ppsn->flag)) {
			printf("已经删除 %s %c %d %s %s\n", ppsn->name, ppsn->sex, ppsn->age, ppsn->phoneNum, ppsn->address);
			ppsn->flag = 1;
			return;
		}
	}

}
void show_all(struct Person * ppsn)
{
	int count = sumCount;
	while (ppsn != NULL && count--) {
		if (!(ppsn->flag))
			printf("%s %c %d %s %s\n", ppsn->name, ppsn->sex, ppsn->age, ppsn->phoneNum, ppsn->address);
		ppsn++;
	}
}

int cmp(const void *a, const void *b) {
	struct Person *pa = (struct Person *)a;
	struct Person *pb = (struct Person *)b;
	return strcmp(pa->name, pb->name);
}
void sort_by_name(struct Person * ppsn) {
	if (ppsn == NULL) {
		return;
	}
	qsort(ppsn, sumCount, sizeof(struct Person), cmp);
}
void find_person(struct Person * ppsn) {
	char name[NAME];
	printf("请输入删除人的姓名\n");
	scanf("%s", name);
	if (NULL == name || ppsn == NULL) {
		return;
	}
	int count = sumCount;
	for (; ppsn != NULL && count; count--, ppsn++) {
		if (strcmp(ppsn->name, name) == 0 && !(ppsn->flag)) {
			printf("%s %c %d %s %s\n", ppsn->name, ppsn->sex, ppsn->age, ppsn->phoneNum, ppsn->address);
			return;
		}
	}
	printf("没有找到\n");
}

void update(struct Person * ppsn) {
	char name[NAME];
	printf("请输入删除人的姓名\n");
	scanf("%s", name);
	if (NULL == name || ppsn == NULL) {
		return;
	}
	int count = sumCount;
	for (; ppsn != NULL && count; count--, ppsn++) {
		if (strcmp(ppsn->name, name) == 0 && !(ppsn->flag)) {
			printf("找到联系人，请依次输入姓名 性别 年龄 电话 地址，中间用空格隔开\n");
			scanf("%s %c %d %s %s", ppsn->name, &ppsn->sex, &ppsn->age, ppsn->phoneNum, ppsn->address);
			return;
		}
	}
	printf("没有找到\n");
}

主函数

#include "add_list.h"
#include <stdio.h>
void menu() {
	printf("**************************************\n");
	printf("********1.添加联系人信息 *************\n");
	printf("********2.删除联系人信息 *************\n");
	printf("********3.查找联系人信息 *************\n");
	printf("********4.修改联系人信息 *************\n");
	printf("********5.显示所有指定联系人信息******\n");
	printf("********6.清空所有指定联系人信息******\n");
	printf("********7.按名排序所有联系人**********\n");
	printf("********0.退出************************\n");
	printf("**************************************\n");
}

int main()
{

	printf("请选择你想创建的通讯录大小\n");
	int sizeOfAdd;
	scanf("%d", &sizeOfAdd);
	init(sizeOfAdd);
	int chose;
	do {
		menu();
		scanf("%d", &chose);
		switch (chose) {
		case 1:add_person(ppsn);
			break;
		case 2:del_person(ppsn);
			break;
		case 3:find_person(ppsn);
			break;
		case 4:update(ppsn);
			break;
		case 5:show_all(ppsn);
			break;
		case 6:clear(ppsn);
			break;
		case 7:sort_by_name(ppsn);
			break;
		default:break;

		}

	} while (chose);

	system("pause");
}