头文件

#pragma once
//人的信息
#define MAX 100
#define NAME_MAX 20
#define SEX_MAX 5
#define ADDR_MAX 30
#define TELE_MAX 12
#include<stdio.h>
#include<string.h>
#include<assert.h>
typedef struct PeoInfo
{char name[NAME_MAX];int age;char sex[SEX_MAX];char addr[ADDR_MAX];char tele[TELE_MAX];}PeoInfo;
typedef struct Contact
{PeoInfo data[MAX];int sz;//当前已经放的信息的个数
}Contact;
void InitContact(Contact* pc);
//增加联系人
void AddContact(Contact*pc);
void ShowContact(Contact* ps);
void DelContact( Contact*ps);
void SearchContact(Contact* ps);
void SortContact(Contact* ps);

实现文件：

#define _CRT_SECURE_NO_WARNINGS 1
#include "contact.h"
int FindByName(Contact* ps, char name[])
{int i = 0;for (i = 0; i < ps->sz; i++){if (strcmp(ps->data[i].name, name) == 0){return i;}}return -1;
}
void InitContact(Contact* pc)
{pc->sz = 0;memset(pc->data, 0, sizeof(pc->data));
}
void AddContact(Contact* pc)
{if (pc->sz == MAX){printf("通讯录已满，无法添加");return;}printf("请输入名字\n");scanf("%s", pc->data[pc->sz].name);printf("请输入年龄\n");scanf("%d", &(pc->data[pc->sz].age));printf("请输入性别\n");scanf("%s", pc->data[pc->sz].sex);printf("请输入地址\n");scanf("%s", pc->data[pc->sz].addr);printf("请输入电话\n");scanf("%s", pc->data[pc->sz].tele);pc->sz++;
}
void ShowContact(Contact*pc)
{int i = 0;printf("%-20s\t%-4s\t%-5s\t%-20s\t%-12s\n", "名字", "年龄", "性别", "地址", "电话");for (i = 0; i < pc->sz; i++){printf("%-20s\t%-4d\t%-5s\t%-20s\t%-12s\n",pc->data[i].name,pc->data[i].age,pc->data[i].sex,pc->data[i].addr,pc->data[i].tele);}
}
//删除指定联系人
void DelContact( Contact* ps)
{char name[NAME_MAX] = { 0 };if (ps->sz == 0){printf("通讯录为空，无法删除\n");return;}printf("请输入要删除的人的名字：");scanf("%s",name);int ret = FindByName(ps, name);if (-1 == ret){printf("要查找的人不存在");}//删除for (int i = ret; i < (ps->sz)-1; i++){ps->data[i] = ps->data[i + 1];}ps->sz--;printf("删除成功");
}void SearchContact(Contact * ps){char name[NAME_MAX] = { 0 };printf("请输入要寻找的人的名字：");scanf("%s", name);int pos = FindByName(ps,name);if (pos == -1){printf("无该人物");return;}//打印信息printf("%-20s\t%-4s\t%-5s\t%-20s\t%-12s\n", "名字", "年龄", "性别", "地址", "电话");printf("%-20s\t%-4d\t%-5s\t%-20s\t%-12s\n",ps->data[pos].name,ps->data[pos].age,ps->data[pos].sex,ps->data[pos].addr,ps->data[pos].tele);}void ModifyContact(Contact* ps){char name[NAME_MAX] = { 0 };printf("请输入要寻找的人的名字：");scanf("%s", name);int pos = FindByName(ps, name);if (pos == -1){printf("无该人物");return;}printf("请输入名字\n");scanf("%s", ps->data[pos].name);printf("请输入年龄\n");scanf("%d", &(ps->data[pos].age));printf("请输入性别\n");scanf("%s", ps->data[pos].sex);printf("请输入地址\n");scanf("%s", ps->data[pos].addr);printf("请输入电话\n");scanf("%s", ps->data[pos].tele);printf("修改完成");}//按年龄大小排序void SortContact(Contact* ps){for (int i = 0; i < ps->sz-1; i++){for (int j = 0; j < ps->sz - 1; j++){if (ps->data[j].age >ps->data[j + 1].age){int age = ps->data[j].age;ps->data[j].age = ps->data[j + 1].age;ps->data[j + 1].age = age;}}}}

测试文件：

#define _CRT_SECURE_NO_WARNINGS 1#include "contact.h"
void menu()
{printf("****1.add      2.del   ****\n");printf("****3.search   4.modify****\n");printf("****5.show     6.sort  ****\n");printf("****0.exit             ****\n");printf("***************************\n");
}
int main()
{int input = 0;Contact con;//初始化；InitContact(&con);do{menu();printf("请选择：>");scanf("%d", &input);switch (input){case 1:AddContact(&con);break;case 2:DelContact(&con);break;case 3:SearchContact(&con);break;case 4: ModifyContact(&con);break;case 5:ShowContact(&con);break;case 6:SortContact(&con);break;default:printf("退出通讯录");break;}} while (1);
}