From 99f5635fc1cbeff6670f3d593fe61f0e6da6d5fc Mon Sep 17 00:00:00 2001 From: iridiumR Date: Sat, 7 May 2022 15:48:50 +0800 Subject: [PATCH] =?UTF-8?q?=E6=9A=82=E4=B8=94=E5=81=B7=E4=B8=80=E4=B8=8B?= =?UTF-8?q?=E4=B9=A6=E4=B8=8A=E4=BB=A3=E7=A0=81?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../Lab3-1-2_Calculator4490_v4.pro | 26 +++ .../Lab3/Lab3-1-2_Calculator4490_v4/cal.cpp | 164 +++++++++++++++ .../Lab3/Lab3-1-2_Calculator4490_v4/cal.h | 15 ++ .../Lab3/Lab3-1-2_Calculator4490_v4/main.cpp | 11 + .../Lab3-1-2_Calculator4490_v4/mainwindow.cpp | 127 ++++++++++++ .../Lab3-1-2_Calculator4490_v4/mainwindow.h | 48 +++++ .../Lab3-1-2_Calculator4490_v4/mainwindow.ui | 194 ++++++++++++++++++ 7 files changed, 585 insertions(+) create mode 100644 SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/Lab3-1-2_Calculator4490_v4.pro create mode 100644 SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/cal.cpp create mode 100644 SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/cal.h create mode 100644 SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/main.cpp create mode 100644 SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/mainwindow.cpp create mode 100644 SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/mainwindow.h create mode 100644 SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/mainwindow.ui diff --git a/SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/Lab3-1-2_Calculator4490_v4.pro b/SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/Lab3-1-2_Calculator4490_v4.pro new file mode 100644 index 0000000..bc0f036 --- /dev/null +++ b/SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/Lab3-1-2_Calculator4490_v4.pro @@ -0,0 +1,26 @@ +QT += core gui + +greaterThan(QT_MAJOR_VERSION, 4): QT += widgets + +CONFIG += c++17 + +# You can make your code fail to compile if it uses deprecated APIs. +# In order to do so, uncomment the following line. +#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0 + +SOURCES += \ + cal.cpp \ + main.cpp \ + mainwindow.cpp + +HEADERS += \ + cal.h \ + mainwindow.h + +FORMS += \ + mainwindow.ui + +# Default rules for deployment. +qnx: target.path = /tmp/$${TARGET}/bin +else: unix:!android: target.path = /opt/$${TARGET}/bin +!isEmpty(target.path): INSTALLS += target diff --git a/SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/cal.cpp b/SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/cal.cpp new file mode 100644 index 0000000..8b5f4ce --- /dev/null +++ b/SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/cal.cpp @@ -0,0 +1,164 @@ +#include "cal.h" +QString inToPost(QString infix) { + std::stack stack; + char current = 0; //读入的字符 + QString postfix; //写入后缀表达式的字符串 + + std::map priority; //运算符号优先级表 + priority['+'] = 0; + priority['-'] = 0; + priority['*'] = 1; + priority['/'] = 1; + priority['^'] = 2; + + for (int i = 0; i < infix.length(); ++i) //逐个读取中缀表达式字符串中的字符 + { + current = infix[i].toLatin1(); + if (isdigit(current)) //如果是数字直接输出 + { + postfix.push_back(current); + continue; + } + switch (current) { + case '+': + case '-': + case '*': + case '/': + case '^': + // postfix.push_back('#'); + if (i > + 0) //如果运算符的前一项不是右括号则说明前一个数字输入完毕，用#标识前面几个字符组成一个数字 + { + if (infix[i - 1] != ')') + postfix.push_back('#'); + /*if(infix[i-1].isDigit()) + postfix.push_back('#'); + else + throw "expression is illegality";*/ + } else + postfix.push_back('#'); + if (!stack + .empty()) //比较目前符号与栈顶符号优先级，低于则出栈，并输出字符串 + { + char tempTop = stack.top(); + while (tempTop != '(' && priority[current] <= priority[tempTop]) { + stack.pop(); + postfix.push_back(tempTop); + if (stack.empty()) + break; + tempTop = stack.top(); + } + } + stack.push( + current); //符号全部出栈或者遇到了'('或者大于栈顶符号的优先级，将新符号压入栈中 + break; + case '.': + postfix.push_back(current); + break; + case '%': + postfix.push_back(current); + break; + case '(': + stack.push(current); //左括号直接入栈 + break; + case ')': + postfix.push_back('#'); //右括号说明前方数字输入完成，标识一下 + char tempTop; + tempTop = stack.top(); + while (tempTop != '(') //直到栈顶元素是左括号才停止循环 + { + stack.pop(); + postfix.push_back(tempTop); + tempTop = stack.top(); + } + stack.pop(); + break; + default: + throw "expression has illegality character"; + break; + } + } + if (infix[infix.size() - 1] != ')') { + if (infix[infix.size() - 1].isDigit()) + postfix.push_back('#'); + else + throw "expression is illegality"; + } + while (!stack.empty()) { + char tempOut = stack.top(); + stack.pop(); + postfix.push_back(tempOut); + } + return postfix; +} + +double compute(QString s) { + std::stack stack; + QString str; + double curr; + + double temNum1; + double temNum2; + for (auto i = s.begin(); i != s.end(); i++) { + if ((*i).isDigit()) { + str.push_back(*i); + continue; + } + switch ((*i).toLatin1()) { + case '+': + temNum1 = stack.top(); + stack.pop(); + temNum2 = stack.top(); + stack.pop(); + stack.push(temNum2 + temNum1); + break; + case '-': + temNum1 = stack.top(); + stack.pop(); + temNum2 = stack.top(); + stack.pop(); + stack.push(temNum2 - temNum1); + break; + case '*': + temNum1 = stack.top(); + stack.pop(); + temNum2 = stack.top(); + stack.pop(); + stack.push(temNum2 * temNum1); + break; + case '/': + temNum1 = stack.top(); + stack.pop(); + temNum2 = stack.top(); + stack.pop(); + stack.push(temNum2 / temNum1); + break; + case '^': + temNum1 = stack.top(); + stack.pop(); + temNum2 = stack.top(); + stack.pop(); + stack.push(pow(temNum2, temNum1)); + break; + case '.': + str.push_back(*i); + break; + case '#': + curr = str.toDouble(); //字符串转换为浮点型 + str.clear(); + stack.push(curr); + break; + case '%': + curr = stack.top(); + stack.pop(); + curr *= 0.01; + stack.push(curr); + break; + default: + throw "expression has illegality character"; + break; + } + } + curr = stack.top(); + return curr; +} diff --git a/SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/cal.h b/SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/cal.h new file mode 100644 index 0000000..198fcdc --- /dev/null +++ b/SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/cal.h @@ -0,0 +1,15 @@ +#ifndef CAL_H +#define CAL_H +#include "mainwindow.h" +#include +#include +#include +#include +#include +#include +#include +#include + +QString inToPost(QString infix); +double compute(QString s); +#endif // CAL_H diff --git a/SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/main.cpp b/SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/main.cpp new file mode 100644 index 0000000..fd3e533 --- /dev/null +++ b/SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/main.cpp @@ -0,0 +1,11 @@ +#include "mainwindow.h" + +#include + +int main(int argc, char *argv[]) +{ + QApplication a(argc, argv); + MainWindow w; + w.show(); + return a.exec(); +} diff --git a/SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/mainwindow.cpp b/SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/mainwindow.cpp new file mode 100644 index 0000000..77a10fe --- /dev/null +++ b/SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/mainwindow.cpp @@ -0,0 +1,127 @@ +#include "mainwindow.h" +#include "cal.h" +#include "ui_mainwindow.h" +#include + +static QString displayText; + +MainWindow::MainWindow(QWidget *parent) + : QMainWindow(parent), ui(new Ui::MainWindow) { + ui->setupUi(this); + ui->lineEdit->setText("0"); + result = 0.0; + waitForOperand = true; + + connectSlots(); +} + +MainWindow::~MainWindow() { delete ui; } + +//错误处理 +void MainWindow::abortOperation() { + result = 0.0; + pendingOperator.clear(); + ui->lineEdit->setText("0"); + isFinished = false; + QMessageBox::warning(this, "运算错误", "算式不合法"); +} + +//数字被点击 +void MainWindow::digitClicked() { + QPushButton *digitBtn = static_cast(sender()); + // if(ui->lineEdit->text() == "0" && value == "0") + // return; + if (!isFinished) { + displayText.append(digitBtn->text()); + ui->lineEdit->setText(displayText); + } else { + return; + } +} + +void MainWindow::on_clearBtn_clicked() { + //将当前显示的数归零 + displayText.chop(1); + ui->lineEdit->setText(displayText); + isFinished = false; +} + +void MainWindow::on_clearAllBtn_clicked() { + //将当前显示的数据归零，并将之前保存的数据运算清除 + displayText.clear(); + ui->lineEdit->setText(displayText); + isFinished = false; + result = 0.0; +} + +void MainWindow::on_equalBtn_clicked() { + try { + result = compute(inToPost(ui->lineEdit->text())); + } + + catch (...) { + abortOperation(); + } + isFinished = 1; + ui->lineEdit->setText(QString::number(result)); +} + +//运算符 +void MainWindow::operatorClicked() { + QPushButton *clickedBtn = qobject_cast(sender()); + if (!isFinished) { + displayText.append(clickedBtn->text()); + ui->lineEdit->setText(displayText); + } else { + return; + } +} + +//槽链接 +void MainWindow::connectSlots() { + + QPushButton *digitBtns[10] = {ui->digitBtn0, ui->digitBtn1, ui->digitBtn2, + ui->digitBtn3, ui->digitBtn4, ui->digitBtn5, + ui->digitBtn6, ui->digitBtn7, ui->digitBtn8, + ui->digitBtn9}; + for (auto btn : digitBtns) + connect(btn, &QPushButton::clicked, this, &MainWindow::digitClicked); + QPushButton *operatorBtns[8] = { + ui->addBtn, ui->subtractionBtn, ui->mulBtn, ui->divisionBtn, + ui->squareBtn, ui->pointBtn, ui->LBtn, ui->RBtn}; + for (auto btn : operatorBtns) + connect(btn, &QPushButton::clicked, this, &MainWindow::operatorClicked); +} + +void MainWindow::keyPressEvent(QKeyEvent *event) { + switch (event->key()) { + case Qt::Key_0: + emit ui->digitBtn0->clicked(); + break; + case Qt::Key_1: + emit ui->digitBtn1->clicked(); + break; + case Qt::Key_2: + emit ui->digitBtn2->clicked(); + break; + case Qt::Key_3: + emit ui->digitBtn3->clicked(); + break; + case Qt::Key_4: + emit ui->digitBtn4->clicked(); + break; + case Qt::Key_5: + emit ui->digitBtn5->clicked(); + break; + case Qt::Key_6: + emit ui->digitBtn6->clicked(); + break; + case Qt::Key_7: + emit ui->digitBtn7->clicked(); + break; + case Qt::Key_8: + + default: + break; + } +} diff --git a/SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/mainwindow.h b/SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/mainwindow.h new file mode 100644 index 0000000..84efef0 --- /dev/null +++ b/SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/mainwindow.h @@ -0,0 +1,48 @@ +#ifndef MAINWINDOW_H +#define MAINWINDOW_H + +#include +#include +QT_BEGIN_NAMESPACE +namespace Ui { +class MainWindow; +} +QT_END_NAMESPACE + +class MainWindow : public QMainWindow { + Q_OBJECT + +public: + MainWindow(QWidget *parent = nullptr); + ~MainWindow(); + +private: + Ui::MainWindow *ui; + + void keyPressEvent(QKeyEvent *e); + + //终止运算，清除数据，报错 + void abortOperation(); + //连接信号和槽 + void connectSlots(); + //储存运算符 + QString pendingOperator; + //储存运算结果 + double result; + //标记是否等待一个操作数 + bool waitForOperand; + + bool isFinished; + +private slots: + void on_clearBtn_clicked(); + + void on_clearAllBtn_clicked(); + + void on_equalBtn_clicked(); + + void digitClicked(); + + void operatorClicked(); +}; +#endif // MAINWINDOW_H diff --git a/SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/mainwindow.ui b/SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/mainwindow.ui new file mode 100644 index 0000000..efd9574 --- /dev/null +++ b/SoftwareDesign/Lab3/Lab3-1-2_Calculator4490_v4/mainwindow.ui @@ -0,0 +1,194 @@ + + + MainWindow + + + + 0 + 0 + 406 + 362 + + + + Calculator_v3_4490 + + + Qt::ToolButtonTextOnly + + + + + + + 8 + + + + + + + 9 + + + + + + + 7 + + + + + + + 0 + + + + + + + Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter + + + true + + + + + + + + + + + + + + + / + + + + + + + 3 + + + + + + + 2 + + + + + + + 1 + + + + + + + * + + + + + + + 6 + + + + + + + ^ + + + + + + + 5 + + + + + + + 4 + + + + + + + . + + + + + + + - + + + + + + + = + + + + + + + ( + + + + + + + ClearAll + + + + + + + Back + + + + + + + ) + + + + + + + + + 0 + 0 + 406 + 30 + + + + + + + +