Qt 每月收支计算，针对每月有支出（房贷、车贷、花呗、借呗）的情况，计算收支明细，直观看到未来的个人经济情况，培养良好的消费习惯，进行理性的财富支配，量入为出。

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QDate>
#include <QMessageBox>MainWindow::MainWindow(QWidget *parent) :QMainWindow(parent),ui(new Ui::MainWindow)
{ui->setupUi(this);QFont font;font.setPixelSize(16);setFont(font);setWindowTitle(QStringLiteral("每月收支计算"));ui->lineEdit_shouru->setMaximumWidth(70);ui->lineEdit_shouru->setMinimumWidth(70);ui->lineEdit_huan->setMaximumWidth(70);ui->lineEdit_huan->setMinimumWidth(70);ui->lineEdit_curent_money->setMaximumWidth(70);ui->lineEdit_curent_money->setMinimumWidth(70);ui->dateEdit_shouru->setCalendarPopup(true);ui->dateEdit_shouru->setDate(QDate::currentDate());ui->dateEdit_huan->setCalendarPopup(true);ui->dateEdit_huan->setDate(QDate::currentDate());ui->dateEdit_huanqing->setCalendarPopup(true);ui->dateEdit_huanqing->setDate(QDate::currentDate());
}MainWindow::~MainWindow()
{delete ui;
}void MainWindow::on_pushButton_add_clicked()
{int huan = ui->lineEdit_huan->text().toInt();QDate huanDay = ui->dateEdit_huan->date();QDate huanqingDay = ui->dateEdit_huanqing->date();QMap<QDate, int> tmpMap;QDate tmp = huanDay;while (tmp <= huanqingDay){tmpMap.insert(tmp, huan);tmp = tmp.addMonths(1);}foreach (QDate date, tmpMap.keys()){ui->textBrowser_huan->append(QStringLiteral("%1 %2").arg(date.toString("yyyy-MM-dd")).arg(tmpMap.value(date)));if (huanMap.contains(date)){huanMap.insert(date, huanMap.value(date) + tmpMap.value(date));}else{huanMap.insert(date, tmpMap.value(date));}}ui->textBrowser_huan->append("\n");
}void MainWindow::on_pushButton_calc_clicked()
{if (huanMap.isEmpty()){return;}ui->textBrowser_total->clear();QStringList monthLst;QList<QDate> huanDateLst = huanMap.keys();foreach (QDate date, huanDateLst){QString key = date.toString("yyyy-MM");if (!monthLst.contains(key)){monthLst.append(key);}}int shouru = ui->lineEdit_shouru->text().toInt();int shouruDay = ui->dateEdit_shouru->date().day() - 1;QMap<QDate, int> shouruMap;foreach (QString key, monthLst){QDate date = QDate::fromString(key, "yyyy-MM").addDays(shouruDay);if (!huanDateLst.contains(date)){huanDateLst.append(date);}shouruMap.insert(date, shouru);}qSort(huanDateLst.begin(), huanDateLst.end());int shouruTotal = 0;int huanTotal = 0;int currentMoney = ui->lineEdit_curent_money->text().toInt();foreach (QString month, monthLst){int total = 0;foreach (QDate date, huanDateLst){QString dateStr = date.toString("yyyy-MM-dd");if (dateStr.startsWith(month)){if (shouruMap.contains(date)){currentMoney += shouruMap.value(date);ui->textBrowser_total->append(QStringLiteral("%1 +%2 余%3").arg(dateStr).arg(shouruMap.value(date)).arg(currentMoney));shouruTotal += shouruMap.value(date);}if (huanMap.contains(date)){currentMoney -= huanMap.value(date);ui->textBrowser_total->append(QStringLiteral("%1 -%2 余%3").arg(dateStr).arg(huanMap.value(date)).arg(currentMoney));total += huanMap.value(date);}}}ui->textBrowser_total->append(QStringLiteral("%1 共还%2\n").arg(month).arg(total));huanTotal += total;}ui->textBrowser_total->append(QStringLiteral("总收入：%1 总支出：%2 净：%3 余：%4\n").arg(shouruTotal).arg(huanTotal).arg(shouruTotal + ui->lineEdit_curent_money->text().toInt() - huanTotal).arg(currentMoney));
}void MainWindow::on_pushButton_clear_clicked()
{if (informationMessageBox(QStringLiteral("提示"), QStringLiteral("确定清空数据"), false)){huanMap.clear();ui->lineEdit_shouru->clear();ui->lineEdit_huan->clear();ui->lineEdit_curent_money->clear();ui->dateEdit_shouru->setDate(QDate::currentDate());ui->dateEdit_huan->setDate(QDate::currentDate());ui->dateEdit_huanqing->setDate(QDate::currentDate());ui->textBrowser_huan->clear();ui->textBrowser_total->clear();}
}bool MainWindow::informationMessageBox(const QString &title, const QString &text, bool isOnlyOk)
{QMessageBox msgBox(this);msgBox.setFont(this->font());msgBox.setIcon(QMessageBox::Information);msgBox.setWindowTitle(title);msgBox.setText(text);if (isOnlyOk){msgBox.setStandardButtons(QMessageBox::Ok);msgBox.setButtonText(QMessageBox::Ok, QStringLiteral("确定"));}else{msgBox.setStandardButtons(QMessageBox::Ok | QMessageBox::Cancel);msgBox.setButtonText(QMessageBox::Ok, QStringLiteral("确定"));msgBox.setButtonText(QMessageBox::Cancel, QStringLiteral("取消"));}return (msgBox.exec() == QMessageBox::Ok);
}