管理系统"/>
（C语言）实现基于PHP的某公司自来水收费管理系统
这是本来要用PHP写的项目
但是是我学校C语言实训课的毕设
所以全项目是用C语言写的
同时，班上分的小组完成，而我所在的组里都是几个摸鱼的人，所以全项目是我一个人手搓的，虽然没有用上数据链表，用的是结构体加文件形成的类似于数据链表的形式实现其基本功能，但是足够了
言归正传
全项目分为三个文件
Structure.c文件是整个系统的基础所在，内含一个main函数，是整个系统的框架结构体现
#include"manage.h"int main()
{//文件File();//系统int input1 = 1, input2 = 0, pass = 0;do{if (pass == 0)pass = PassMenu();else if (pass == 1){AdMainMenu();scanf("%d", &input1);switch (input1){case 1:SystemInformation();break;case 2:do{AdUserManageMenu();scanf("%d", &input2);switch (input2){case 1:AdChangeUserInformation();break;case 2:AddUserInformation();break;case 3:DeleteUserInformation();break;case 4:SearchUserInformation();break;case 5:LookThroughAllUserInformation();break;case 6:printf("\n正在返回上一级...\n");input2 = 0;break;default:printf("\n输入错误，请重试\n");}} while (input2);break;case 3:do{AdBillingManageMenu();scanf("%d", &input2);switch (input2){case 1:AllUserBillingInformation();break;case 2:SearchUserBillingInformation();break;case 3:BillingStandard();break;case 4:UserBillingUp();break;case 5:UserBillingWarning();break;case 6:printf("\n正在返回上一级...\n");input2 = 0;break;default:printf("\n输入错误，请重试\n");}} while (input2);break;case 4:ExitMenu();input1 = 0;break;default:printf("\n输入错误，请重试\n");}}else if (pass == 2){UserMainMenu();scanf("%d", &input1);switch (input1){case 1:do{UserManageMenu();scanf("%d", &input2);switch (input2){case 1:ChangeUserInformation();break;case 2:LookThroughUserInformation();break;case 3:printf("\n正在返回上一级...\n");input2 = 0;break;default:printf("\n输入错误，请重试\n");}} while (input2);break;case 2:do{BillingManageMenu();scanf("%d", &input2);switch (input2){case 1:BillingStandard();break;case 2:BillingInformation();break;case 3:BillingUp();break;case 4:printf("\n正在返回上一级...\n");input2 = 0;break;default:printf("\n输入错误，请重试\n");}} while (input2);break;case 3:ExitMenu();input1 = 0;break;default:printf("\n输入错误，请重试\n");}}} while (input1);return 0;
}Manage.h文件是整个系统的头文件，内含多个系统头文件，定义了多个函数
#include<stdio.h>
#include<string.h>
#include<stdlib.h>//文件
void File();
void AddUserInformation();
void DeleteUserInformation();
void SearchUserInformation();
void LookThroughAllUserInformation();
void LookThroughUserInformation();
void AdChangeUserInformation();
void ChangeUserInformation();//菜单
int PassMenu();
int AdMainMenu();
int UserMainMenu();
int ExitMenu();
int AdUserManageMenu();
int UserManageMenu();
int AdBillingManageMenu();
int BillingManageMenu();//系统
void SystemInformation();//登录
int CheckName();
int CheckPassword();//收费
void AllUserBillingInformation();
void SearchUserBillingInformation();
void UserBillingUp();
void UserBillingWarning();
void BillingInformation();
void BillingUp();
float BillingCalculation();
void BillingStandard();System.c文件是整个系统的关键、核心，内含众多函数用于实现系统的各种功能
#include"manage.h"char Administer[] = "MingAn";
char AdPassword[] = "123lan??";
char Use[20] = { 0 };
char Password = { 0 };
struct User
{char name[21];char password[17];float water;float fee;
}user[1000] = { 0, 0, 0, 0 };//---------------------------------------文件--------------------------------------
void File()
{FILE* fp = fopen("UserList", "r");if (fp == NULL){printf("用户文件'UserList'不存在，将重新创建\n");fp = fopen("UserList", "w");}
}void AddUserInformation()
{FILE* fp = fopen("UserList", "a+");struct user;printf("\n请输入用户名（最长20位）:");scanf("%s", user->name);printf("\n请输入密码（区分大小写、最长16位）:");scanf("%s", user->password);printf("\n请输入已使用的水量（单位：吨）");scanf("%f", &user->water);printf("\n系统正在计算您的费用...\n");float take = user->water;user->fee = BillingCalculation(&take);fwrite(&(user), 1, sizeof(struct User), fp);fclose(fp);printf("\n用户添加成功！\n即将返回上一级...\n");
}void DeleteUserInformation()
{FILE* fp = fopen("UserList", "r");int r = 0, num = 0;r = fread(&user[num], 1, sizeof(struct User), fp);while (r){num++;r = fread(&user[num], 1, sizeof(struct User), fp);}fclose(fp);char input[21] = { 0 };int count = 0;printf("\n请输入要删除的用户名:");scanf("%s", input);while (count <= num){if (strcmp(user[count].name, input) == 0){for (; count < num; count++){strcpy(user[count].name, user[count + 1].name);strcpy(user[count].password, user[count + 1].password);user[count].water = user[count + 1].water;user[count].fee = user[count + 1].fee;}printf("\n删除成功！\n即将返回上一级\n");break;}elsecount++;}if (count > num)printf("\n未找到此用户\n即将返回上一级\n");fp = fopen("UserList", "w");count = 0;while (count < num){fwrite(&user[count], 1, sizeof(struct User), fp);count++;}fclose(fp);
}void SearchUserInformation()
{FILE* fp = fopen("UserList", "r");int r = 0, num = 0, take = 0;r = fread(&user[num], 1, sizeof(struct User), fp);while (r){num++;r = fread(&user[num], 1, sizeof(struct User), fp);}fclose(fp);char input[21] = { 0 };int count = 0;printf("\n请输入要查找的用户名:");scanf("%s", input);printf("\n++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 欢迎使用本公司自来水收费管理系统 |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 用户信息 |\n");while (count <= num){if (strcmp(user[count].name, input) == 0){printf("| |\n");printf("| 用户名：%-21s密码：%-17s用水量：%.1f吨\t费用：%.2f元\t |\n", user[count].name, user[count].password, user[count].water, user[count].fee);count++;take = 1;}elsecount++;}if (take == 0)printf("\n未找到此用户！\n即将返回上一级...\n");else{printf("| |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("\n若要返回上一级");system("pause");}
}void LookThroughAllUserInformation()
{FILE* fp = fopen("UserList", "r");int r = 0, num = 0;r = fread(&user[num], 1, sizeof(struct User), fp);while (r){num++;r = fread(&user[num], 1, sizeof(struct User), fp);}fclose(fp);int count = 0;printf("\n++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 欢迎使用本公司自来水收费管理系统 |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 用户信息 |\n");while (count < num){if (strcmp(user[count].name, "") != 0){printf("| |\n");printf("| 用户名：%-21s密码：%-17s用水量：%.1f吨\t费用：%.2f元\t |\n", user[count].name, user[count].password, user[count].water, user[count].fee);count++;}elsecount++;}printf("| |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("\n若要返回上一级");system("pause");
}void LookThroughUserInformation()
{FILE* fp = fopen("UserList", "r");int r = 0, num = 0, take = 0;r = fread(&user[num], 1, sizeof(struct User), fp);while (r){num++;r = fread(&user[num], 1, sizeof(struct User), fp);}fclose(fp);char input[21] = { 0 };int count = 0;printf("\n请输入用户名以验证身份:");scanf("%s", input);printf("\n++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 欢迎使用本公司自来水收费管理系统 |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 用户信息 |\n");while (count <= num){if (strcmp(user[count].name, input) == 0){printf("| |\n");printf("| 用户名：%-21s密码：%-17s用水量：%.1f吨\t费用：%.2f元\t |\n", user[count].name, user[count].password, user[count].water, user[count].fee);count++;take = 1;}elsecount++;}if (take == 0)printf("\n用户验证失败！\n即将返回上一级...\n");else{printf("| |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("\n若要返回上一级");system("pause");}
}void AdChangeUserInformation()
{FILE* fp = fopen("UserList", "r");int r = 0, num = 0;r = fread(&user[num], 1, sizeof(struct User), fp);while (r){num++;r = fread(&user[num], 1, sizeof(struct User), fp);}fclose(fp);char input[21] = { 0 };int count = 0, take = 1;printf("\n请输入用户名:");scanf("%s", input);while (count <= num){if (strcmp(user[count].name, input) == 0){while (take){printf("\n请输入要修改的密码:");scanf("%s", input);if (strcmp(user[count].password, input) == 0)printf("\n输入的密码与原密码一致，请重试！\n");else{strcpy(user[count].password, input);take = 0;}}printf("\n修改成功!\n即将返回上一级...\n");break;}count++;}if (count > num)printf("\n未找到此用户!\n即将返回上一级...\n");fp = fopen("UserList", "w");count = 0;while (count < num){fwrite(&user[count], 1, sizeof(struct User), fp);count++;}fclose(fp);
}void ChangeUserInformation()
{FILE* fp = fopen("UserList", "r");int r = 0, num = 0;r = fread(&user[num], 1, sizeof(struct User), fp);while (r){num++;r = fread(&user[num], 1, sizeof(struct User), fp);}fclose(fp);char input[21] = { 0 };int count = 0, take = 1;printf("\n请输入你的用户名以确认身份:");scanf("%s", input);while (count <= num){if (strcmp(user[count].name, input) == 0){while (take){printf("\n请输入要修改的密码:");scanf("%s", input);if (strcmp(user[count].password, input) == 0)printf("\n输入的密码与原密码一致，请重试！\n");else{strcpy(user[count].password, input);take = 0;}}printf("\n修改成功!\n即将返回上一级...\n");break;}count++;}if (count > num)printf("\n验证用户身份失败!\n即将返回上一级...\n");fp = fopen("UserList", "w");count = 0;while (count < num){fwrite(&user[count], 1, sizeof(struct User), fp);count++;}fclose(fp);
}//---------------------------------------菜单--------------------------------------
int PassMenu()
{int pass = 0, a = 0;printf("\n++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 欢迎使用本公司自来水收费管理系统 |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 初始界面 |\n");printf("| |\n");printf("| |\n");printf("| |\n");printf("| |\n");printf("| 未检测到用户登录信息 |\n");printf("| 请登录 |\n");printf("| |\n");printf("| |\n");printf("| |\n");printf("| |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");do{char username[20] = { 0 }, password[20] = { 0 };printf("\n请输入账号:");gets(username);printf("\n请输入密码（区分大小写）:");gets(password);if (strcmp(username, Administer) == 0 && strcmp(password, AdPassword) == 0)//管理员{pass = 1;return pass;}else if (CheckName(username) == 1 && CheckPassword(password) == 1)//用户{pass = 2;return pass;}else{printf("\n用户名或密码错误，请重新输入\n");pass = 0;return pass;}} while (a);
}int AdMainMenu()
{printf("\n++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 欢迎使用本公司自来水收费管理系统 |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 管理员界面 |\n");printf("| |\n");printf("| |\n");printf("| |\n");printf("| 1.查看系统基本信息 |\n");printf("| 2.用户信息管理 |\n");printf("| 3.用户收费管理 |\n");printf("| 4.退出 |\n");printf("| |\n");printf("| |\n");printf("| |\n");printf("| |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("\n请输入数字以进行下一步操作:");
}int UserMainMenu()
{printf("\n++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 欢迎使用本公司自来水收费管理系统 |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 用户界面 |\n");printf("| |\n");printf("| |\n");printf("| |\n");printf("| 1.用户信息管理 |\n");printf("| 2.用户收费管理 |\n");printf("| 3.退出 |\n");printf("| |\n");printf("| |\n");printf("| |\n");printf("| |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("\n请输入数字以进行下一步操作:");
}int ExitMenu()
{printf("\n正在退出系统...\n");printf("\n++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 欢迎使用本公司自来水收费管理系统 |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| |\n");printf("| |\n");printf("| |\n");printf("| |\n");printf("| 感谢您的使用 |\n");printf("| 欢迎下次光临 |\n");printf("| |\n");printf("| |\n");printf("| |\n");printf("| |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");
}int AdUserManageMenu()
{printf("\n++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 欢迎使用本公司自来水收费管理系统 |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 用户管理 |\n");printf("| |\n");printf("| 1.修改用户信息 |\n");printf("| 2.增加用户信息 |\n");printf("| 3.删除用户信息 |\n");printf("| 4.查找用户信息 |\n");printf("| 5.查看用户信息 |\n");printf("| 6.返回 |\n");printf("| |\n");printf("| |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("\n请输入数字以进行下一步操作:");
}int UserManageMenu()
{printf("\n++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 欢迎使用本公司自来水收费管理系统 |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 用户管理 |\n");printf("| |\n");printf("| |\n");printf("| |\n");printf("| 1.修改用户信息 |\n");printf("| 2.查看用户信息 |\n");printf("| 3.返回 |\n");printf("| |\n");printf("| |\n");printf("| |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("\n请输入数字以进行下一步操作:");
}int AdBillingManageMenu()
{printf("\n++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 欢迎使用本公司自来水收费管理系统 |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 收费管理 |\n");printf("| |\n");printf("| |\n");printf("| 1.查看全体用户费用信息 |\n");printf("| 2.查看单一用户费用信息 |\n");printf("| 3.查看收费标准 |\n");printf("| 4.用户费用充值 |\n");printf("| 5.用户费用预警 |\n");printf("| 6.返回 |\n");printf("| |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("\n请输入数字以进行下一步操作:");
}int BillingManageMenu()
{printf("\n++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 欢迎使用本公司自来水收费管理系统 |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 收费管理 |\n");printf("| |\n");printf("| |\n");printf("| 1.查看收费标准 |\n");printf("| 2.查看费用信息 |\n");printf("| 3.费用充值 |\n");printf("| 4.返回 |\n");printf("| |\n");printf("| |\n");printf("| |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("\n请输入数字以进行下一步操作:");
}//---------------------------------------信息--------------------------------------
void SystemInformation()
{printf("\n++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 欢迎使用本公司自来水收费管理系统 |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 系统信息 |\n");printf("| |\n");printf("| |\n");printf("| |\n");printf("| 系统名称：自来水收费管理系统 |\n");printf("| 系统作者：十组 - 兰小贵、王奕力、杨浩楠 |\n");printf("| 系统版本：V1.1 |\n");printf("| |\n");printf("| |\n");printf("| |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("\n若要返回主界面");system("pause");
}//---------------------------------------收费--------------------------------------
void AllUserBillingInformation()
{FILE* fp = fopen("UserList", "r");int r = 0, num = 0;r = fread(&user[num], 1, sizeof(struct User), fp);while (r){num++;r = fread(&user[num], 1, sizeof(struct User), fp);}fclose(fp);int count = 0;printf("\n++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 欢迎使用本公司自来水收费管理系统 |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 收费信息 |\n");while (count < num){if (strcmp(user[count].name, "") != 0){printf("| |\n");printf("| 用户名：%-21s用水量：%.1f吨\t 费用：%.2f元\t |\n", user[count].name, user[count].water, user[count].fee);count++;}elsecount++;}printf("| |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("\n若要返回上一级");system("pause");
}void SearchUserBillingInformation()
{FILE* fp = fopen("UserList", "r");int r = 0, num = 0, take = 0;r = fread(&user[num], 1, sizeof(struct User), fp);while (r){num++;r = fread(&user[num], 1, sizeof(struct User), fp);}fclose(fp);char input[21] = { 0 };int count = 0;printf("\n请输入要查找的用户名:");scanf("%s", input);printf("\n++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 欢迎使用本公司自来水收费管理系统 |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 收费信息 |\n");while (count <= num){if (strcmp(user[count].name, input) == 0){printf("| |\n");printf("| 用户名：%-21s用水量：%.1f吨\t 费用：%.2f元\t |\n", user[count].name, user[count].water, user[count].fee);count++;take = 1;}elsecount++;}if (take == 0)printf("\n未找到此用户！\n即将返回上一级...\n");else{printf("| |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("\n若要返回上一级");system("pause");}
}void UserBillingUp()
{FILE* fp = fopen("UserList", "r");int r = 0, num = 0;r = fread(&user[num], 1, sizeof(struct User), fp);while (r){num++;r = fread(&user[num], 1, sizeof(struct User), fp);}fclose(fp);char input[21] = { 0 };int count = 0, take = 1;printf("\n请输入用户名:");scanf("%s", input);while (count <= num){if (strcmp(user[count].name, input) == 0){printf("\n请输入充值金额:");float fee = 0;scanf("%f", &fee);user[count].fee += fee;printf("\n充值成功!\n即将返回上一级...\n");break;}count++;}if (count > num)printf("\n未找到此用户!\n即将返回上一级...\n");fp = fopen("UserList", "w");count = 0;while (count < num){fwrite(&user[count], 1, sizeof(struct User), fp);count++;}fclose(fp);
}void UserBillingWarning()
{FILE* fp = fopen("UserList", "r");int r = 0, num = 0;r = fread(&user[num], 1, sizeof(struct User), fp);while (r){num++;r = fread(&user[num], 1, sizeof(struct User), fp);}fclose(fp);int count = 0;printf("\n++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 欢迎使用本公司自来水收费管理系统 |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 收费信息 |\n");while (count < num){if (strcmp(user[count].name, "") != 0){if (user[count].fee < 0){printf("| |\n");printf("| 用户名：%-21s用水量：%.1f吨\t 费用：%.2f元\t |\n", user[count].name, user[count].water, user[count].fee);count++;}elsecount++;}elsecount++;}printf("| |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("\n若要返回上一级");system("pause");
}void BillingInformation()
{FILE* fp = fopen("UserList", "r");int r = 0, num = 0, take = 0;r = fread(&user[num], 1, sizeof(struct User), fp);while (r){num++;r = fread(&user[num], 1, sizeof(struct User), fp);}fclose(fp);char input[21] = { 0 };int count = 0;printf("\n请输入用户名以验证身份:");scanf("%s", input);printf("\n++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 欢迎使用本公司自来水收费管理系统 |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 用户信息 |\n");while (count <= num){if (strcmp(user[count].name, input) == 0){printf("| |\n");printf("| 用户名：%-21s密码：%-17s用水量：%.1f吨\t费用：%.2f元\t |\n", user[count].name, user[count].password, user[count].water, user[count].fee);count++;take = 1;}elsecount++;}if (take == 0)printf("\n用户验证失败！即将返回上一级...\n");else{printf("| |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("\n若要返回上一级");system("pause");}
}void BillingUp()
{FILE* fp = fopen("UserList", "r");int r = 0, num = 0;r = fread(&user[num], 1, sizeof(struct User), fp);while (r){num++;r = fread(&user[num], 1, sizeof(struct User), fp);}fclose(fp);char input[21] = { 0 };int count = 0, take = 1;printf("\n请输入用户名以验证身份:");scanf("%s", input);while (count <= num){if (strcmp(user[count].name, input) == 0){printf("\n请输入充值金额:");float fee = 0;scanf("%f", &fee);user[count].fee += fee;printf("\n充值成功!\n即将返回上一级...\n");break;}count++;}if (count > num)printf("\n用户验证失败!\n即将返回上一级...\n");fp = fopen("UserList", "w");count = 0;while (count < num){fwrite(&user[count], 1, sizeof(struct User), fp);count++;}fclose(fp);
}float BillingCalculation(float *water)
{float fee = 0;if (*water <= 15)fee = *water * 0.6;else if (*water > 15 && *water <= 20)fee = 9 + (*water - 15) * 1.4;elsefee = 9 + 7 + (*water - 20) * 2.1;return -fee;
}void BillingStandard()
{printf("\n++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 欢迎使用本公司自来水收费管理系统 |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("| 收费标准 |\n");printf("| |\n");printf("| |\n");printf("| |\n");printf("| 用水15吨以内为0．6元/吨 |\n");printf("| 15-20吨为1．4元/吨 |\n");printf("| 20吨以上为2．1元/吨 |\n");printf("| |\n");printf("| |\n");printf("| |\n");printf("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");printf("\n若要返回上一级");system("pause");
}//---------------------------------------登录--------------------------------------int CheckName(char Username[])
{FILE* fp = fopen("UserList", "r");int r = 0, num = 0, take = 0;r = fread(&user[num], 1, sizeof(struct User), fp);while (r){num++;r = fread(&user[num], 1, sizeof(struct User), fp);}fclose(fp);int count = 0;while (count <= num){if (strcmp(user[count].name, Username) == 0){take = 1;return take;}elsecount++;}count--;if (count > num)take = 0;return take;
}int CheckPassword(char Password[])
{FILE* fp = fopen("UserList", "r");int r = 0, num = 0, take = 0;r = fread(&user[num], 1, sizeof(struct User), fp);while (r){num++;r = fread(&user[num], 1, sizeof(struct User), fp);}fclose(fp);int count = 0;while (count <= num){if (strcmp(user[count].password, Password) == 0){take = 1;return take;}elsecount++;}count--;if (count > num)take = 0;return take;
}以上，做完这个项目后感觉整个人对文件和结构体的理解瞬间深刻了起来（感觉上的），听说下学期开始学Java了，C语言进阶也估计不会再学了
就这样吧，大致掌握一门编程语言的基础，写出这么一个勉强能用的系统，虽说才学了一学期的C语言（10月开学，12月中旬提前放假，9月开始看网课学习，大概三个月半的学习，大致上是掌握了）
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