Skip to content
Projects
Groups
Snippets
Help
This project
Loading...
Sign in / Register
Toggle navigation
Q
Qt-huchengzhi
Overview
Overview
Details
Activity
Cycle Analytics
Repository
Repository
Files
Commits
Branches
Tags
Contributors
Graph
Compare
Charts
Issues
0
Issues
0
List
Board
Labels
Milestones
Merge Requests
0
Merge Requests
0
CI / CD
CI / CD
Pipelines
Jobs
Schedules
Charts
Wiki
Wiki
Snippets
Snippets
Members
Collapse sidebar
Close sidebar
Activity
Graph
Charts
Create a new issue
Jobs
Commits
Issue Boards
Open sidebar
操作系统二组
Qt-huchengzhi
Commits
e8b30bcd
Commit
e8b30bcd
authored
Jan 26, 2021
by
狐承志
Browse files
Options
Browse Files
Download
Email Patches
Plain Diff
Add new file
parents
Show whitespace changes
Inline
Side-by-side
Showing
1 changed file
with
92 additions
and
0 deletions
+92
-0
第一次代码
+92
-0
No files found.
第一次代码
0 → 100644
View file @
e8b30bcd
1.dialog.cpp
1.dialog.cpp
const static double PI=3.1416;
#include "dialog.h"
#include "ui_dialog.h"
Dialog::Dialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::Dialog)
{
ui->setupUi(this);
}
Dialog::~Dialog()
{
delete ui;
}
void Dialog::on_countBtn_clicked()
{
bool ok;
QString tempStr;
QString valueStr=ui->radiusLineEdit->text();
int valueInt=valueStr.toInt(&ok);
double area=valueInt*valueInt*PI;//计算圆面积
ui->areaLabel_2->setText(tempStr.setNum(area));
}
二、采用代a码完成
1.dialog.cpp
const static double PI=3.1416;
#include<QGridLayout>
#include "dialog.h"
Dialog::Dialog(QWidget *parent)
: QDialog(parent)
{
label1=new QLabel(this);
label1->setText(tr("请输入园的半径:"));
lineEdit=new QLineEdit(this);
label2=new QLabel(this);
button=new QPushButton(this);
button->setText(tr("显示对应园的面积:"));
QGridLayout *mainLayout=new QGridLayout(this);
mainLayout->addWidget(label1,0,0);
mainLayout->addWidget(lineEdit,0,1);
mainLayout->addWidget(label2,1,0);
mainLayout->addWidget(button,1,1);
connect(lineEdit,SIGNAL(textChanged(QString)),this,SLOT(showArea()));
}
void Dialog::showArea()
{
bool ok;
QString tempStr;
QString valueStr=lineEdit->text();
int valueInt=valueStr.toInt(&ok);
double area=valueInt*valueInt*PI;//计算圆面积
label2->setText(tempStr.setNum(area));
}
Dialog::~Dialog()
{
}
2.dialog.h
#include<QLabel>
#include<QLineEdit>
#include<QPushButton>
#ifndef DIALOG_H
#define DIALOG_H
#include <QDialog>
class Dialog : public QDialog
{
Q_OBJECT
public:
Dialog(QWidget *parent = 0);
~Dialog();
private:
QLabel*label1,*label2;
QLineEdit*lineEdit;
QPushButton*button;
private slots:
void showArea();
};
#endif // DIALOG_H
Write
Preview
Markdown
is supported
0%
Try again
or
attach a new file
Attach a file
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Cancel
Please
register
or
sign in
to comment