qt编程简单的计算器

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1、QT编程实现简易的计算器一、 实验目的1) 熟悉QtCreator的简单操作。 2) 了解Qt程序编写框架。 3) 了解信号和槽机制，熟练掌握信号与槽在应用程序中的使用。 二、 实验内容 1) 查看API手册，学习简单的Qt类的使用，如QLineEdit、QPushButton等。 2) 用QtCreator创建工程，用Qt编写计算器程序。 3) 对计算器程序进行移植。 三、 实验步骤 1. 创建工程 1) 打开QtCreator，如图1所示。 选择File->New File or Project，然后在弹出的对话框中选择Other Project->Empty Qt proj

2、ect（如图2所示），然后进入下一步。  选择Qt版本，这里选择使用Qt4.7.1，取消对Qt in PATH的选择（如图4所示），然后进入下一步，完成新工程的创建（如图5所示）。实现代码Calcuulator.h代码：#ifndefCALCULATOR_H#defineCALCULATOR_H#include#include#include#includeclassCalculator:publicQDialog{Q_OBJECTprotected:QLineEdit*lineEdit

3、or;QPushButton*button_0;QPushButton*button_1;QPushButton*button_2;QPushButton*button_3;QPushButton*button_4;QPushButton*button_5;QPushButton*button_6;QPushButton*button_7;QPushButton*button_8;QPushButton*button_9;QPushButton*button_ce;QPushButton*button_jia;QPushButton*button_jian;QPushButton

4、*button_cheng;QPushButton*button_chu;QPushButton*button__;QPushButton*button_dengyu;intnum1,num2,result;//boolzhenghao;//intmark;//charfuhao;//QStringS;//public:Calculator();privateslots:voidbutton_0_clicked();voidbutton_1_clicked();voidbutton_2_clicked();voidbutton_3_clicked();voidbutton_4_c

5、licked();voidbutton_5_clicked();voidbutton_6_clicked();voidbutton_7_clicked();voidbutton_8_clicked();voidbutton_9_clicked();voidbutton_ce_clicked();voidbutton_jia_clicked();voidbutton_jian_clicked();voidbutton_cheng_clicked();voidbutton_chu_clicked();voidbutton__clicked();voidbutton_dengyu_cl

6、icked();};#endif//CALCULATOR_HCalculator.cpp代码：#include#include#include#include#include#include"calculator.h"Calculator::Calculator(){num1=0;num2=0;result=0;zhenghao=true;mark=1;lineEditor=newQLineEdit("0");S="";button_0=newQPushButton("0")

7、;button_1=newQPushButton("1");button_2=newQPushButton("2");button_3=newQPushButton("3");button_4=newQPushButton("4");button_5=newQPushButton("5");button_6=newQPushButton("6");button_7=newQPushButton("7");button_8=newQPushButton("8");button_9=