一.MAIN函数的构造
这段笔者认为比较可取的地方在于enum和switch的搭配。
#include"contact.h" void menu() { printf("********************************\n"); printf("******* 1.add 2.del *******\n"); printf("******* 3.show 4.save *******\n"); printf("******* 5.modify 6.search******\n"); printf("******* 7.sort 0.exit ******\n"); printf("********************************\n"); } int main() { int input = 0; struct Conn con;//con就是通讯录 InitContact(&con); do { menu(); scanf("%d", &input); switch (input) { case ADD: AddContact(&con); break; case DEL: DelContact(&con); break; case SHOW: ShowContact(&con); break; case SAVE: SaveContact(&con); break; case MODIFY: ModifyContact(&con); break; case SEARCH: SearchContact(&con); break; case SORT: SortContact(&con); break; case EXIT: DestoryContact(&con); printf("退出通讯录\n"); break; } } while (input); return 0; }
二.函数构造
#include"contact.h" void CheckContact(struct Conn* ps) { if (ps->size == ps->capacity) { struct Contact* ptr = (struct Contact*)realloc(ps->data, (ps->capacity + 5) * sizeof(Contact)); if (ptr != NULL) { ps->data = ptr; ps->capacity += 5; printf("增容成功\n"); } else { printf("增容失败\n"); } } } void LoadContact(Conn* ps) { //加载 struct Contact tmp = { 0 }; FILE* pfread = fopen("contact.txt", "rb"); if (pfread == NULL) { printf("LoadContact:%s\n", strerror(errno)); } else { while (fread(&tmp, sizeof(Contact), 1, pfread)) { CheckContact(ps); ps->data[ps->size] = tmp; ps->size++; } fclose(pfread); pfread = NULL; } } void InitContact(struct Conn* ps) { ps->data=(struct Contact*)malloc(INITAMOUNT * sizeof(struct Contact)); if (ps->data == NULL) { return; } ps->size = 0; ps->capacity = INITAMOUNT; LoadContact(ps); } void AddContact(struct Conn* ps) { //判断是否需要扩容。 CheckContact(ps); printf("请输入名字:>"); scanf("%s", &ps->data[ps->size].name); printf("请输入性别:>"); scanf("%s", &ps->data[ps->size].sex); printf("请输入年龄:>"); scanf("%d", &ps->data[ps->size].age); printf("请输入电话:>"); scanf("%s", &ps->data[ps->size].tele); printf("请输入地址:>"); scanf("%s", &ps->data[ps->size].addr); printf("添加成功\n"); ps->size++; } void ShowContact(struct Conn* ps) { if (ps->size == 0) { printf("通讯录为空\n"); } else { int i = 0; //先打印标题 printf("%-8s\t%-2s\t%-2s\t%-10s\t%-10s\n", "名字", "性别", "年龄", "电话", "地址"); for (i = 0; i < ps->size; i++) { printf("%-8s\t%-2s\t%-2d\t%-10s\t%-10s\n", ps->data[i].name, ps->data[i].sex, ps->data[i].age, ps->data[i].tele, ps->data[i].addr); } } } static int Find_Byname(const struct Conn* ps, char name[MAX_NAME]) { int i = 0; for (i = 0; i < ps->size; i++) { if (0 == strcmp(ps->data[i].name, name)) { return i; } } return -1; } void DelContact(struct Conn* ps) { char name[MAX_NAME]; printf("请输入要删去人的姓名\n"); scanf("%s", &name); int pos = Find_Byname(ps, name); if (pos == -1) { printf("通讯录中没有此人的信息\n"); } else { for (int i = pos; i < ps->size - 1; i++) { ps->data[i] = ps->data[i + 1]; } ps->size--; printf("删除成功\n"); } } void SearchContact(struct Conn* ps) { //在Conn中寻找，找到就打印 char name[MAX_NAME]; printf("请输入要寻找人的姓名\n"); scanf("%s", name); int pos = Find_Byname(ps, name); if (pos == -1) { printf("通讯录中无此人\n"); } else { printf("%-8s\t%-2s\t%-2s\t%-10s\t%-10s\n", "名字", "性别", "年龄", "电话", "地址"); printf("%-8s\t%-2s\t%-2d\t%-10s\t%-10s\n", ps->data[pos].name, ps->data[pos].sex, ps->data[pos].age, ps->data[pos].tele, ps->data[pos].addr); } } void ModifyContact(struct Conn* ps) { char name[MAX_NAME]; printf("请输入要修改人的姓名\n"); scanf("%s", &name); int pos = Find_Byname(ps, name); if (pos == -1) { printf("通讯录中查无此人\n"); } else { printf("可以修改\n"); printf("请输入名字:>"); scanf("%s", &ps->data[pos].name); printf("请输入性别:>"); scanf("%s", &ps->data[pos].sex); printf("请输入年龄:>"); scanf("%d", &ps->data[pos].age); printf("请输入电话:>"); scanf("%s", &ps->data[pos].tele); printf("请输入地址:>"); scanf("%s", &ps->data[pos].addr); printf("修改成功\n"); } } void DestoryContact(struct Conn* ps) { free(ps->data); ps->data = NULL; } void SaveContact(struct Conn* ps) { FILE* pfwrite = fopen("contact.txt", "wb"); if (pfwrite == NULL) { //报错位置 printf("SaveContact:%s\n", strerror(errno)); return; } else { //写通讯录中的数据到文件中去 int i = 0; for (i = 0; i < ps->size; i++) { fwrite(&ps->data[i], sizeof(Contact), 1, pfwrite); } fclose(pfwrite); pfwrite = NULL; } printf("保存成功\n"); } void SortContact(struct Conn* ps) { //根据名字首字母大小排序 int i, j; int flag = 1; for (i = 0; i < ps->size; i++) { for (j = 0; j < ps->size - i - 1; j++) { if (strcmp(ps->data[j].name, ps->data[j + 1].name) >= 0) { flag = 0; struct Contact tmp = ps->data[j]; ps->data[j] = ps->data[j + 1]; ps->data[j + 1] = tmp; } } if (flag == 1) { break; } } printf("排序成功\n"); ShowContact(ps); }
三.头文件
#pragma once #include<stdio.h> #include<string.h> #include<stdlib.h> //对姓名 年龄 性别 电话 住址定义宏 #define MAX_NAME 20 #define MAX_SEX 4 #define MAX_TELE 20 #define MAX_ADDR 20 #define INITAMOUNT 5 ///初始化通讯录只能放5个 enum OPTION { EXIT, ADD, DEL, SHOW, SAVE, MODIFY, SEARCH, SORT }; struct Contact { char name[MAX_NAME]; char sex[MAX_SEX]; char tele[MAX_TELE]; char addr[MAX_ADDR]; int age; }; struct Conn { struct Contact* data; //随时记录通讯录大小 int size; //通讯录容量 int capacity; }; void InitContact(struct Conn* ps); void SaveContact(struct Conn* ps); void DestoryContact(struct Conn* ps); void ModifyContact(struct Conn* ps); void DelContact(struct Conn* ps); void ShowContact(struct Conn* ps); void AddContact(struct Conn* ps); void SearchContact(struct Conn* ps); void SortContact(struct Conn* ps);
fwrite , fread 这几个函数真的难住了笔者。
四.结果预览
