C++记账簿

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头文件

account_item.h

#pragma once
#include "common.h"struct AccountItem
{string itemType;int amount;string detail;
};// 操控记账簿
void loadDataFromFile(vector<AccountItem>& items);
void accounting(vector<AccountItem>& items);
void query(const vector<AccountItem>& items);void income(vector<AccountItem>& items);
void expand(vector<AccountItem>& items);
void insertIntoFile(const AccountItem& item);void queryItems(const vector<AccountItem>& items);
void queryItems(const vector<AccountItem>& items, const string itemType);
void printItem(const AccountItem& item);

common.h

#pragma once#include <iostream>
#include <fstream>
#include <string>
#include <vector>using namespace std;#define INCOME "收入"
#define EXPAND "支出"
#define FILENAME "D:\\AccountBook.txt"// 显示菜单
void showMainMenu();
void showAccountingMenu();
void showQueryMenu();// 合法性校验
char readMenuSelection(int options);
char readQuitConfirm();
int readAmount();

C++源码

account.cpp

#include "common.h"
#include "account_item.h"int main() {vector<AccountItem> items;loadDataFromFile(items);bool quit = false;while (!quit){showMainMenu();char key = readMenuSelection(3);switch (key){case '1':showAccountingMenu();accounting(items);break;case '2':showQueryMenu();query(items);break;case '3':cout << "\n确认退出？ (Y/N): ";if (readQuitConfirm() == 'Y')quit = true;break;default:break;}cout << "\n";}
}

menus.cpp

#include "common.h"void showMainMenu() {system("cls");cout << "\n";cout << "================== 欢迎使用记账簿 ====================" << endl;cout << "|                                                    |" << endl;cout << "|===============     1  记 账          ==============|" << endl;cout << "|===============     2  查 询          ==============|" << endl;cout << "|===============     3  退 出          ==============|" << endl;cout << "|____________________________________________________|" << endl;cout << "\n请选择（1-3）：";
}void showAccountingMenu() {system("cls");cout << "\n";cout << "================== 选择记账种类 =====================" << endl;cout << "|                                                   |" << endl;cout << "|===============     1  收 入         ==============|" << endl;cout << "|===============     2  支 出         ==============|" << endl;cout << "|===============     3  返回主菜单    ==============|" << endl;cout << "|___________________________________________________|" << endl;cout << "\n请选择（1-3）：";
}void showQueryMenu() {system("cls");cout << "\n";cout << "================== 先择查询条件 =====================" << endl;cout << "|                                                   |" << endl;cout << "|===============     1  统计所以账目  ==============|" << endl;cout << "|===============     2  统 计 收 入   ==============|" << endl;cout << "|===============     3  统 计 支 出   ==============|" << endl;cout << "|===============     4  返回主菜单    ==============|" << endl;cout << "|___________________________________________________|" << endl;cout << "\n请选择（1-4）：";
}

operations.cpp

#include "common.h"
#include "account_item.h"// ------------------------------- 0 载入 -----------------------------------
void loadDataFromFile(vector<AccountItem>& items) {// 逐行读取每一条账目，包装成AccountItemifstream input(FILENAME);AccountItem item;while (input >> item.itemType >> item.amount >> item.detail) {items.push_back(item);}input.close();
}// ------------------------------- 1 记账 -----------------------------------
void accounting(vector<AccountItem>& items) {char key = readMenuSelection(3);switch (key){case '1': //收入income(items);break;case '2': //支出expand(items);break;case '3': //返回主菜单break;default:break;}cout << "\n";
}void income(vector<AccountItem>& items) {AccountItem item;item.itemType = INCOME;cout << "\n本次收入金额：";item.amount = readAmount();cout << "\n备注：";getline(cin, item.detail);//添加到vector容器中items.push_back(item);//写入文件做持久化保存insertIntoFile(item);cout << "\n--------------------------记账成功！---------------------------\n" << endl;cout << "\n请按回车建返回主菜单..." << endl;//cin.get();string line;getline(cin, line);
}void insertIntoFile(const AccountItem& item) {// 创建一个ofstream对象,以追加方式写入ofstream output(FILENAME, ios::out | ios::app);output << item.itemType << "\t" << item.amount << "\t" ;output << item.detail << endl;output.close();
}void expand(vector<AccountItem>& items) {AccountItem item;item.itemType = EXPAND;cout << "\n本次收入金额：";item.amount = -readAmount();cout << "\n备注：";getline(cin, item.detail);//添加到vector容器中items.push_back(item);//写入文件做持久化保存insertIntoFile(item);cout << "\n--------------------------记账成功！---------------------------\n" << endl;cout << "\n请按回车建返回主菜单..." << endl;//cin.get();string line;getline(cin, line);
}// ------------------------------- 2 查询 -----------------------------------
void query(const vector<AccountItem>& items) {char key = readMenuSelection(4);switch (key){case '1': //查询所有账目，并统计总收支queryItems(items);break;case '2': //查询所有收入，并统计总收入queryItems(items, INCOME);break;case '3': //查询所有支出，并统计总支出queryItems(items, EXPAND);break;case '4': //返回主菜单break;default:break;}cout << "\n";
}void queryItems(const vector<AccountItem>& items) {cout << "------------------------------ 查询结果 ------------------------------" << endl;cout << "\n类型\t\t金额\t\t备注\n" << endl;// 遍历账目int total = 0;for (auto item : items) {printItem(item);total += item.amount;}// 打印总收支cout << "==========================================================================\n";cout << "总收支：" << total << endl;cout << "\n请按回车建返回主菜单..." << endl;string line;getline(cin, line);
}void printItem(const AccountItem& item) {cout << item.itemType << "\t\t" << item.amount << "\t\t" << item.detail << endl;
}void queryItems(const vector<AccountItem>& items,const string itemType) {cout << "------------------------------ 查询结果 ------------------------------" << endl;cout << "\n类型\t\t金额\t\t备注\n" << endl;// 遍历账目int total = 0;for (auto item : items) {if (item.itemType != itemType)continue;printItem(item);total += item.amount;}// 打印总收支cout << "==========================================================================\n";cout << ((itemType == INCOME) ? "总收入：" :"总支出：" )<< total << endl;cout << "\n请按回车建返回主菜单..." << endl;string line;getline(cin, line);
}

read_input.cpp

#include "common.h"// 读取键盘输入的菜单选项，进行合法性校验
char readMenuSelection(int options) {// 读取键盘输入的字符串string str;while (true) {getline(cin, str);//进行合法性校验if (str.size() != 1 || str[0] - '0' <= 0 || str[0] - '0' > options)cout << "输入错误，请重新选择：";elsebreak;}return str[0];
}char readQuitConfirm() {string str;while (true) {getline(cin, str);if (str.size() != 1 ||( toupper(str[0]) != 'Y' && toupper(str[0]) != 'N'))cout << "输入错误，请重新输入（Y/N）:";elsebreak;}return toupper(str[0]);
}int readAmount() {int amount;string str;while (true) {getline(cin, str);// 字符串inttry {amount = stoi(str);break;}catch (invalid_argument e) {cout << "输入错误，请正确输入数字：";}}return amount;
}

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