1
项目创建：
2
运行效果图
QT版本计算器
mainwindow.h
main.cpp
mainwindow.cpp
mainwindow.ui
文件1 mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
private slots:
void on_pushButton_clicked();
private:
Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H第二个文件 main.cpp
#include "mainwindow.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}第三个文件 mainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
}
MainWindow::~MainWindow()
{
delete ui;
}
//
void MainWindow::on_pushButton_clicked()
{
// 1输入什么就显示什么
// QString str = ui->lineEdit->text();
// ui->label->setText(str);
// 2 C版本的输入
// char buf[100] = {0};
// strcpy(buf,"Hello World!");
// QString str = buf;
// ui->label->setText(str);
// 3 把 str的字符挖出来
// char buf[100] = {0};
// QString str = ui->lineEdit->text();
// const char *p = str.toStdString().data();
// strcpy(buf,p);
// str += " World";
// ui->label->setText(str);
// 4十进制计算器
// QString str1 = ui ->lineEdit->text();
// QString str2 = ui ->lineEdit_2->text();
// int a = str1.toInt();
// int b = str2.toInt();
// int c = a+b;
// QString str3 = QString::number(c);
// ui->label->setText(str3);
// 5 十六进制计算器
// QString str1 = ui ->lineEdit->text();
// QString str2 = ui ->lineEdit_2->text();
// int a = str1.toInt(0,16);
// int b = str2.toInt(0,16);
// int c = a+b;
// QString str3 = QString::number(c,16);
// ui->label->setText(str3);
// 6 8八进制计算器
QString str1 = ui ->lineEdit->text();
QString str2 = ui ->lineEdit_2->text();
int a = str1.toInt(0,8);
int b = str2.toInt(0,8);
int c = a+b;
QString str3 = QString::number(c,8);
ui->label->setText(str3);
}第四个文件 mainwindow.ui
<?xml version="1.0" encoding="UTF-8"?> <ui version="4.0"> <class>MainWindow</class> <widget class="QMainWindow" name="MainWindow"> <property name="geometry"> <rect> <x>0</x> <y>0</y> <width>400</width> <height>300</height> </rect> </property> <property name="windowTitle"> <string>MainWindow</string> </property> <widget class="QWidget" name="centralWidget"> <widget class="QPushButton" name="pushButton"> <property name="geometry"> <rect> <x>280</x> <y>70</y> <width>75</width> <height>23</height> </rect> </property> <property name="text"> <string>PushButton</string> </property> </widget> <widget class="QLineEdit" name="lineEdit"> <property name="geometry"> <rect> <x>30</x> <y>70</y> <width>221</width> <height>31</height> </rect> </property> </widget> <widget class="QLabel" name="label"> <property name="geometry"> <rect> <x>30</x> <y>130</y> <width>221</width> <height>61</height> </rect> </property> <property name="text"> <string/> </property> </widget> <widget class="QLineEdit" name="lineEdit_2"> <property name="geometry"> <rect> <x>30</x> <y>30</y> <width>221</width> <height>31</height> </rect> </property> </widget> </widget> <widget class="QMenuBar" name="menuBar"> <property name="geometry"> <rect> <x>0</x> <y>0</y> <width>400</width> <height>23</height> </rect> </property> <widget class="QMenu" name="menuChunli"> <property name="title"> <string>chunli</string> </property> </widget> <addaction name="menuChunli"/> </widget> <widget class="QToolBar" name="mainToolBar"> <attribute name="toolBarArea"> <enum>TopToolBarArea</enum> </attribute> <attribute name="toolBarBreak"> <bool>false</bool> </attribute> </widget> <widget class="QStatusBar" name="statusBar"/> </widget> <layoutdefault spacing="6" margin="11"/> <resources/> <connections/> </ui>
