C++/ qt 编写一个简单计算器

#include "mainwindow.h" #include "ui_mainwindow.h" #include<string> #include<QDebug> #include <iostream> #include <strstream> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) , ui(new Ui::MainWindow) { ui->setupUi(this); setWindowTitle("简单计算器"); this->setFixedSize(400,210); } MainWindow::~MainWindow() { delete ui; } void MainWindow::on_pushButton_clicked() { ui->label->setText(ui->label->text()+"1"); } void MainWindow::on_pushButton_2_clicked() { ui->label->setText(ui->label->text()+"2"); } void MainWindow::on_pushButton_3_clicked() { ui->label->setText(ui->label->text()+"3"); } void MainWindow::on_pushButton_4_clicked() { ui->label->setText(ui->label->text()+"4"); } void MainWindow::on_pushButton_5_clicked() { ui->label->setText(ui->label->text()+"5"); } void MainWindow::on_pushButton_6_clicked() { ui->label->setText(ui->label->text()+"6"); } void MainWindow::on_pushButton_7_clicked() { ui->label->setText(ui->label->text()+"7"); } void MainWindow::on_pushButton_8_clicked() { ui->label->setText(ui->label->text()+"8"); } void MainWindow::on_pushButton_9_clicked() { ui->label->setText(ui->label->text()+"9"); } void MainWindow::on_pushButton_11_clicked() { if(ui->label->text().isEmpty()){ }else if(num==4&&ui->label->text().isEmpty()){ }else { ui->label->setText(ui->label->text()+"0"); } } //加法函数 void MainWindow::on_pushButton_10_clicked() { on_pushButton_12_clicked(); num = 1; j= ui->label->text().toDouble(); ui->label->setText(""); } void MainWindow::on_pushButton_13_clicked() { num =0; ui->label->setText(""); } //减法函数 void MainWindow::on_pushButton_14_clicked() { on_pushButton_12_clicked(); num = 2; j= ui->label->text().toDouble(); ui->label->setText(""); } //乘法 void MainWindow::on_pushButton_15_clicked() { on_pushButton_12_clicked(); num = 3; j= ui->label->text().toDouble(); ui->label->setText(""); } //除法 void MainWindow::on_pushButton_16_clicked() { num = 4; on_pushButton_12_clicked(); j= ui->label->text().toDouble(); ui->label->setText(""); } //等于 void MainWindow::on_pushButton_12_clicked() { i= ui->label->text().toDouble(); switch (num) { case 1: base = new AddOpreator(); results= base->Run(i,j); b = QString::number(results); ui->label->setText(""); ui->label->setText(ui->label->text()+ b); break; case 2: base = new SubOpreator(); results= base->Run(j,i); b = QString::number(results); ui->label->setText(""); ui->label->setText(ui->label->text()+ b); break; case 3: base = new MultOpreator(); results= base->Run(j,i); b = QString::number(results); ui->label->setText(""); ui->label->setText(ui->label->text()+ b); break; case 4: base = new DiviOpreator(); results= base->Run(j,i); b = QString::number(results); ui->label->setText(""); ui->label->setText(ui->label->text()+ b); break; default: break; } num=0; }