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Qt
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#ifndef WIDGET_H
#define WIDGET_H
#include
#include
#include
#include
#include
#include
#include
class Widget : public QWidget
{
Q_OBJECT
public:
Widget(QWidget *parent = 0);
~Widget();
private:
QPushButton* btn1;
QHBoxLayout* layout1,*layout2;
QVBoxLayout *layout3;
QGridLayout *layout4;
QLineEdit *edit1, *edit2, *edit3;
QLabel *label1;
QLabel *label2;
private slots:
void on_clicked();
};
#endif // WIDGET_H
#include "widget.h"
Widget::Widget(QWidget *parent)
: QWidget(parent)
{
layout1=new QHBoxLayout;
layout2=new QHBoxLayout;
//layout3=new QVBoxLayout(this);
layout4=new QGridLayout(this);
btn1=new QPushButton;
edit1=new QLineEdit;
edit2=new QLineEdit;
edit3=new QLineEdit;
label1=new QLabel;
// layout1->addWidget(btn1);
// layout1->addWidget(edit1);
// layout1->addWidget(edit2);
// layout1->addWidget(edit3);
// layout2->addWidget(label1);
// layout3->addLayout(layout1);
// layout3->addLayout(layout2);
// btn1->setText("确定");
// int a = edit1->text().toInt();
// int b = edit3->text().toInt();
layout4->addWidget(btn1,0,0);
layout4->addWidget(edit1,0,1);
layout4->addWidget(edit2,0,2);
layout4->addWidget(edit3,0,3);
layout4->addWidget(label1,1,2);
btn1->setText("确定");
connect(btn1,SIGNAL(clicked()),this,SLOT(on_clicked()));
}
Widget::~Widget()
{
}
void Widget::on_clicked()
{
int a = edit1->text().toInt();
int b = edit3->text().toInt();
if (edit2->text() == "+")
label1->setText(QString::number(a + b));
if (edit2->text() == "-")
label1->setText(QString::number(a - b));
if (edit2->text() == "*")
label1->setText(QString::number(a * b));
if (edit2->text() == "/")
{
if (b != 0)
label1->setText(QString::number(a / b));
}
}
效果图
Qt简单项目--加法计算器(详细代码注释) - Arroz - 博客园 https://www.cnblogs.com/ArrozZhu/p/8384427.html QT实现简单的计算器 - kh971024的博客 - CSDN博客 https://blog.csdn.net/kh971024/article/details/78306517 |
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