QT C++实现简单计算器（仿windows计算器普通模式）

时间：2022-12-29 14:35:18

写的过程很痛，网上找不到相关的详细的分析，所以想着发一个吧。

一

QT C++实现简单计算器（仿windows计算器普通模式）

二

版本看自己喜好了，我的是5.4.2。

三

QT C++实现简单计算器（仿windows计算器普通模式）


类名首字母大写。



四

//calculator.h

#ifndef CALCULATOR_H
#define CALCULATOR_H
#include <QMainWindow>
namespace Ui {
class Calculator;
}
class Calculator : public QMainWindow
{
    Q_OBJECT
public:
    explicit Calculator(QWidget *parent = 0);
    ~Calculator();
    enum FLAG_OPERATOR{
        FLAG_OPERATOR_NONE = 0,
        FLAG_OPERATOR_ADD,
        FLAG_OPERATOR_SUB,
        FLAG_OPERATOR_MUL,
        FLAG_OPERATOR_DIV
    };
private slots:
    void on_tb_num0_clicked();
    void on_tb_num1_clicked();
    void on_tb_num2_clicked();
    void on_tb_num3_clicked();
    void on_tb_num4_clicked();
    void on_tb_num5_clicked();
    void on_tb_num6_clicked();
    void on_tb_num7_clicked();
    void on_tb_num8_clicked();
    void on_tb_num9_clicked();
    void on_tb_add_clicked();
    void on_tb_equ_clicked();
    void on_tb_mul_clicked();
    void on_tb_clear_clicked();
    void on_tb_div_clicked();
    void on_tb_sub_clicked();
private:
    Ui::Calculator *ui;
    void clickedNumber(const QString &t);
    void middleResult(void);
    void model();
    bool m_firstOperator;
    QString m_value;
    QString m_leftValue;
    QString m_rightValue;
    FLAG_OPERATOR m_operator;
    QString m_expretion;
    QString m_result;
    int m_model;
};
#endif // CALCULATOR_H

其中用宏代替了“   + - x  /  ” 槽有0~9和“+ - x / ”    

//calculator.cpp

#include "calculator.h"
#include "ui_calculator.h"
Calculator::Calculator(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::Calculator)
{
    ui->setupUi(this);
    on_tb_clear_clicked();
    m_model = 0;
}
Calculator::~Calculator()
{
    delete ui;
}
void Calculator::on_tb_num0_clicked()
{
    clickedNumber(ui->tb_num0->text());
}
void Calculator::on_tb_num1_clicked()
{
    clickedNumber(ui->tb_num1->text());
}
void Calculator::on_tb_num2_clicked()
{
    clickedNumber(ui->tb_num2->text());
}
void Calculator::on_tb_num3_clicked()
{
    clickedNumber(ui->tb_num3->text());
}
void Calculator::on_tb_num4_clicked()
{
    clickedNumber(ui->tb_num4->text());
}
void Calculator::on_tb_num5_clicked()
{
    clickedNumber(ui->tb_num5->text());
}
void Calculator::on_tb_num6_clicked()
{
    clickedNumber(ui->tb_num6->text());
}
void Calculator::on_tb_num7_clicked()
{
    clickedNumber(ui->tb_num7->text());
}
void Calculator::on_tb_num8_clicked()
{
    clickedNumber(ui->tb_num8->text());
}
void Calculator::on_tb_num9_clicked()
{
    clickedNumber(ui->tb_num9->text());
}
void Calculator::clickedNumber(const QString &t)
{
    m_value += t;
    m_expretion += t;
    ui->lb_expretion->setText(m_expretion);
}
void Calculator::on_tb_add_clicked()
{
    middleResult();
    m_operator = FLAG_OPERATOR_ADD;
    m_expretion += ui->tb_add->text();
    ui->lb_expretion->setText(m_expretion);
}
void Calculator::on_tb_mul_clicked()
{
    middleResult();
    m_operator = FLAG_OPERATOR_MUL;
    m_expretion += ui->tb_mul->text();
    ui->lb_expretion->setText(m_expretion);
}
void Calculator::on_tb_div_clicked()
{
    middleResult();
    m_operator = FLAG_OPERATOR_DIV;
    m_expretion += ui->tb_div->text();
    ui->lb_expretion->setText(m_expretion);
}
void Calculator::on_tb_sub_clicked()
{
    middleResult();
    m_operator = FLAG_OPERATOR_SUB;
    m_expretion += ui->tb_sub->text();
    ui->lb_expretion->setText(m_expretion);
}
void Calculator::middleResult()
{
    if(m_firstOperator)
    {
        m_firstOperator = false;
        m_leftValue = m_value;
        m_value.clear();
    }else
    {
        m_rightValue = m_value;
        m_value.clear();
        switch (m_operator) {
        case FLAG_OPERATOR_ADD:
            m_leftValue = QString::number(m_leftValue.toInt() + m_rightValue.toInt());
            on_tb_equ_clicked();
            break;
        case FLAG_OPERATOR_SUB:
            m_leftValue = QString::number(m_leftValue.toInt() - m_rightValue.toInt());
            on_tb_equ_clicked();
            break;
        case FLAG_OPERATOR_MUL:
            m_leftValue = QString::number(m_leftValue.toInt() * m_rightValue.toInt());
            on_tb_equ_clicked();
            break;
        case FLAG_OPERATOR_DIV:
            if(m_rightValue == "0")
            {
                Calculator::on_tb_clear_clicked();
                ui->lb_result->setText("除数不能为0");
            }
            else
            {
                m_leftValue = QString::number(m_leftValue.toInt() / m_rightValue.toInt());
                on_tb_equ_clicked();
            }
            break;
        default:
            break;
        }
    }
}
void Calculator::on_tb_equ_clicked()
{
    m_rightValue = m_value;
    m_value.clear();
    switch (m_operator) {
    case FLAG_OPERATOR_ADD:
        m_result = QString::number(m_leftValue.toInt() + m_rightValue.toInt());
        break;
    case FLAG_OPERATOR_MUL:
        m_result = QString::number(m_leftValue.toInt() * m_rightValue.toInt());
        break;
    case FLAG_OPERATOR_DIV:
        m_result = QString::number(m_leftValue.toInt() / m_rightValue.toInt());
        break;
    case FLAG_OPERATOR_SUB:
        m_result = QString::number(m_leftValue.toInt() - m_rightValue.toInt());
        break;
    default:
        break;
    }
    ui->lb_result->setText(m_result);
}
void Calculator::on_tb_clear_clicked()
{
    m_firstOperator = true;
    m_operator = FLAG_OPERATOR_NONE;
    m_value.clear();
    m_expretion.clear();
    m_result.clear();
    m_leftValue.clear();
    m_rightValue.clear();
    ui->lb_expretion->setText("0");
    ui->lb_result->setText("0");
}

 

 

 

 

 

四则运算部分：将运算部分封装到了on_tb_equ_clicked()即“=”的槽中（偷个懒~~~），on_tb_clear_clicked()函数实现运算符左，右值的清除和两个显示
 

窗口的内容清除。
 

错误报告部分：除数不能为0
 

 

case FLAG_OPERATOR_DIV:
            if(m_rightValue == "0")
            {
                Calculator::on_tb_clear_clicked();
                ui->lb_result->setText("除数不能为0");
            }
            else
            {
                m_leftValue = QString::number(m_leftValue.toInt() / m_rightValue.toInt());
                on_tb_equ_clicked();
            }
            break;
 

 

 

还有一些儿我没写（偷懒）比如：连续输入运算符错误；结果的数值过大无法正常显示；
 


 

//main.cpp
 

 

#include "calculator.h"
#include <QApplication>
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Calculator w;
    w.show();
    return a.exec();
}
 



 

 

 

都能看懂不说了。
 

//calculator.ui
 

 

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>Calculator</class>
 <widget class="QMainWindow" name="Calculator">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>336</width>
    <height>406</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>Calculator</string>
  </property>
  <widget class="QWidget" name="centralWidget">
   <widget class="QWidget" name="layoutWidget">
    <property name="geometry">
     <rect>
      <x>10</x>
      <y>0</y>
      <width>301</width>
      <height>331</height>
     </rect>
    </property>
    <property name="font">
     <font>
      <family>Arial</family>
      <pointsize>12</pointsize>
      <weight>75</weight>
      <bold>true</bold>
     </font>
    </property>
    <layout class="QGridLayout" name="gridLayout">
     <item row="4" column="4">
      <widget class="QToolButton" name="toolButton_9">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>...</string>
       </property>
      </widget>
     </item>
     <item row="4" column="3">
      <widget class="QToolButton" name="toolButton_7">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>...</string>
       </property>
      </widget>
     </item>
     <item row="4" column="2">
      <widget class="QToolButton" name="tb_clear">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>C</string>
       </property>
      </widget>
     </item>
     <item row="5" column="4">
      <widget class="QToolButton" name="toolButton_14">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>...</string>
       </property>
      </widget>
     </item>
     <item row="5" column="3">
      <widget class="QToolButton" name="tb_div">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>÷</string>
       </property>
      </widget>
     </item>
     <item row="5" column="2">
      <widget class="QToolButton" name="tb_num9">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>9</string>
       </property>
      </widget>
     </item>
     <item row="5" column="1">
      <widget class="QToolButton" name="tb_num8">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>8</string>
       </property>
      </widget>
     </item>
     <item row="5" column="0">
      <widget class="QToolButton" name="tb_num7">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>7</string>
       </property>
      </widget>
     </item>
     <item row="4" column="1">
      <widget class="QToolButton" name="toolButton_8">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>...</string>
       </property>
      </widget>
     </item>
     <item row="4" column="0">
      <widget class="QToolButton" name="toolButton_6">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>...</string>
       </property>
      </widget>
     </item>
     <item row="3" column="4">
      <widget class="QToolButton" name="toolButton_5">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>...</string>
       </property>
      </widget>
     </item>
     <item row="3" column="3">
      <widget class="QToolButton" name="toolButton_4">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>...</string>
       </property>
      </widget>
     </item>
     <item row="3" column="2">
      <widget class="QToolButton" name="toolButton_3">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>...</string>
       </property>
      </widget>
     </item>
     <item row="3" column="1">
      <widget class="QToolButton" name="toolButton_2">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>...</string>
       </property>
      </widget>
     </item>
     <item row="3" column="0">
      <widget class="QToolButton" name="toolButton">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>...</string>
       </property>
      </widget>
     </item>
     <item row="6" column="0">
      <widget class="QToolButton" name="tb_num4">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>4</string>
       </property>
      </widget>
     </item>
     <item row="6" column="1">
      <widget class="QToolButton" name="tb_num5">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>5</string>
       </property>
      </widget>
     </item>
     <item row="6" column="2">
      <widget class="QToolButton" name="tb_num6">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>6</string>
       </property>
      </widget>
     </item>
     <item row="6" column="3">
      <widget class="QToolButton" name="tb_mul">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>×</string>
       </property>
      </widget>
     </item>
     <item row="6" column="4">
      <widget class="QToolButton" name="toolButton_26">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>...</string>
       </property>
      </widget>
     </item>
     <item row="7" column="0">
      <widget class="QToolButton" name="tb_num1">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>1</string>
       </property>
      </widget>
     </item>
     <item row="7" column="1">
      <widget class="QToolButton" name="tb_num2">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>2</string>
       </property>
      </widget>
     </item>
     <item row="7" column="2">
      <widget class="QToolButton" name="tb_num3">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>3</string>
       </property>
      </widget>
     </item>
     <item row="7" column="3">
      <widget class="QToolButton" name="tb_sub">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>－</string>
       </property>
      </widget>
     </item>
     <item row="8" column="2">
      <widget class="QToolButton" name="toolButton_19">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>.</string>
       </property>
      </widget>
     </item>
     <item row="8" column="3">
      <widget class="QToolButton" name="tb_add">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>＋</string>
       </property>
      </widget>
     </item>
     <item row="8" column="0" colspan="2">
      <widget class="QToolButton" name="tb_num0">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>0</string>
       </property>
      </widget>
     </item>
     <item row="7" column="4" rowspan="2">
      <widget class="QToolButton" name="tb_equ">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <family>Arial</family>
         <pointsize>12</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>=</string>
       </property>
      </widget>
     </item>
     <item row="1" column="0" colspan="5">
      <widget class="QLabel" name="lb_result">
       <property name="font">
        <font>
         <family>黑体</family>
         <pointsize>14</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>0</string>
       </property>
       <property name="alignment">
        <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
       </property>
      </widget>
     </item>
     <item row="0" column="0" colspan="5">
      <widget class="QLabel" name="lb_expretion">
       <property name="font">
        <font>
         <family>黑体</family>
         <pointsize>14</pointsize>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="text">
        <string>0</string>
       </property>
       <property name="alignment">
        <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
       </property>
      </widget>
     </item>
     <item row="2" column="2">
      <spacer name="verticalSpacer">
       <property name="orientation">
        <enum>Qt::Vertical</enum>
       </property>
       <property name="sizeType">
        <enum>QSizePolicy::Fixed</enum>
       </property>
       <property name="sizeHint" stdset="0">
        <size>
         <width>20</width>
         <height>10</height>
        </size>
       </property>
      </spacer>
     </item>
    </layout>
   </widget>
  </widget>
  <widget class="QMenuBar" name="menuBar">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>336</width>
     <height>23</height>
    </rect>
   </property>
   <widget class="QMenu" name="menu">
    <property name="title">
     <string> 菜单</string>
    </property>
    <addaction name="action"/>
    <addaction name="action_2"/>
    <addaction name="action_3"/>
    <addaction name="separator"/>
    <addaction name="action_5"/>
   </widget>
   <widget class="QMenu" name="menu_2">
    <property name="title">
     <string>帮助</string>
    </property>
    <addaction name="actionHelp"/>
   </widget>
   <addaction name="menu"/>
   <addaction name="menu_2"/>
  </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"/>
  <action name="action">
   <property name="text">
    <string>普通</string>
   </property>
  </action>
  <action name="action_2">
   <property name="text">
    <string>科学</string>
   </property>
  </action>
  <action name="action_3">
   <property name="text">
    <string>程序猿</string>
   </property>
  </action>
  <action name="action_5">
   <property name="text">
    <string>退出</string>
   </property>
  </action>
  <action name="actionHelp">
   <property name="text">
    <string>help</string>
   </property>
  </action>
 </widget>
 <layoutdefault spacing="6" margin="11"/>
 <resources/>
 <connections/>
</ui>



 

 

新人都是画的，所以还是贴个图吧。
 

QT C++实现简单计算器（仿windows计算器普通模式）
 


 

为了完整的模仿win7的计算器但又很多功能目前实现不了，只能用“...”代替了。
 

先写这么多等会了再帖，如有用，请君收藏。
 


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