1、Qt計算器源代碼caculator.h頭文件#ifndef CACULATOR_H#define CACULATOR_H#include <QDialog>#include <QLineEdit>#include <QPushButton>#include <QCloseEvent>#include <QKeyEvent>#include <QMessageBox>#include <QDebug>#include <QGridLayout>#include <QStack>#inclu

2、de "math.h"namespace Ui class Caculator;class Caculator : public QDialog Q_OBJECTpublic: explicit Caculator(QWidget *parent = 0); Caculator(); void widgetInitial();/初始化控件 void widgetLayout();/設置窗口布局 void pushButtonStyle(QPushButton *pushButton);/設置按鈕樣式 void lineEditStyle(QLineEdit *lineEdi

3、t,int height);/設置輸入框樣式 void setNumber(int num);/設置數字 void setOperation(int oper);/設置+、-、*、/、.、)等符號 void caculate(int cacu);/計算x2、x3、sin、cos、tan等 long factorial(int num);/計算階乘 /中綴轉換為后綴表達式 int toPostfix(const char *S,char OPS,int &len); /計算后綴表達式 int evaluation (char B, int len, double &result,

4、bool &flag);protected: void closeEvent(QCloseEvent *event);/窗口關閉事件 void keyPressEvent(QKeyEvent *key);/按鍵事件private: Ui:Caculator *ui; /計算器相關控件 QLineEdit *showTextEdit; /表達式顯示欄 QLineEdit *showResultEdit; /結果顯示欄 QPushButton *backBtn; /回退 QPushButton *ceBtn; /清除 QPushButton *clearBtn; /清空 QPushButt

5、on *oneBtn; QPushButton *twoBtn; QPushButton *threeBtn; QPushButton *fourBtn; QPushButton *fiveBtn; QPushButton *sixBtn; QPushButton *sevenBtn; QPushButton *eightBtn; QPushButton *nineBtn; QPushButton *zeroBtn; QPushButton *pointBtn; /. QPushButton *left_bracket; /( QPushButton *right_bracket; /) /內

6、存管理 QPushButton *clearMemoryBtn; /創建清除內存按鈕 QPushButton *readMemoryBtn; /創建讀內存按鈕 QPushButton *setMemoryBtn; /創建設置內存按鈕 /運算 QPushButton *signBtn; /+/- QPushButton *addBtn; QPushButton *subBtn; QPushButton *mulBtn; QPushButton *divideBtn; QPushButton *sqrtBtn; /開方 QPushButton *squBtn; /平方 QPushButton *c

7、ubeBtn; /立方 QPushButton *logBtn; QPushButton *recipBtn; /倒數 QPushButton *factBtn; /階乘 QPushButton *sinBtn; QPushButton *cosBtn; QPushButton *tanBtn; QPushButton *InBtn; /對數 QPushButton *tenxBtn; QPushButton *expBtn; QPushButton *sinhBtn; QPushButton *coshBtn; QPushButton *tanhBtn; QPushButton *xyBtn

8、; /xy QPushButton *modBtn; /取模 QPushButton *equalBtn; double sumMemory;private slots: /按鈕所關聯的槽函數 void clearMemoryBtnSlot(); void readMemoryBtnSlot(); void setMemoryBtnSlot(); void signBtnSlot(); void sqrtBtnSlot(); void sinBtnSlot(); void backBtnSlot(); void ceBtnSlot(); void clearBtnSlot(); void sq

9、uBtnSlot(); void cosBtnSlot(); void sevenBtnSlot(); void eightBtnSlot(); void nineBtnSlot(); void divideBtnSlot(); void cubeBtnSlot(); void tanBtnSlot(); void fourBtnSlot(); void fiveBtnSlot(); void sixBtnSlot(); void mulBtnSlot(); void logBtnSlot(); void InBtnSlot(); void oneBtnSlot(); void twoBtnS

10、lot(); void threeBtnSlot(); void subBtnSlot(); void recipBtnSlot(); void tenxBtnSlot(); void zeroBtnSlot(); void pointBtnSlot(); void addBtnSlot(); void factBtnSlot(); void equalBtnSlot(); void expBtnSlot(); void sinhBtnSlot(); void coshBtnSlot(); void tanhBtnSlot(); void xyBtnSlot(); void modBtnSlo

11、t(); void left_bracketSlot(); void right_bracketSlot();#endif / CACULATOR_Hcaculator.cpp源文件#include "caculator.h"#include "ui_caculator.h"Caculator:Caculator(QWidget *parent) : QDialog(parent), ui(new Ui:Caculator) ui->setupUi(this); this->widgetInitial(); this->widgetLa

12、yout();Caculator:Caculator() delete ui;/初始化控件void Caculator:widgetInitial() this->setWindowFlags(Qt:WindowCloseButtonHint); this->setWindowTitle("計算器"); this->setFixedSize(this->width(),this->height(); showTextEdit=new QLineEdit(this); showTextEdit->setText("");

13、 showResultEdit=new QLineEdit(this); showResultEdit->setText("0"); backBtn=new QPushButton(this); backBtn->setText(""); ceBtn=new QPushButton(this); ceBtn->setText("CE"); clearBtn=new QPushButton(this); clearBtn->setText("C"); oneBtn=new QPushButto

14、n(this); oneBtn->setText("1"); twoBtn=new QPushButton(this); twoBtn->setText("2"); threeBtn=new QPushButton(this); threeBtn->setText("3"); fourBtn=new QPushButton(this); fourBtn->setText("4"); fiveBtn=new QPushButton(this); fiveBtn->setText(&quo

15、t;5"); sixBtn=new QPushButton(this); sixBtn->setText("6"); sevenBtn=new QPushButton(this); sevenBtn->setText("7"); eightBtn=new QPushButton(this); eightBtn->setText("8"); nineBtn=new QPushButton(this); nineBtn->setText("9"); zeroBtn=new QPushB

16、utton(this); zeroBtn->setText("0"); pointBtn=new QPushButton(this); pointBtn->setText("."); clearMemoryBtn=new QPushButton(this); clearMemoryBtn->setText("MC"); readMemoryBtn=new QPushButton(this); readMemoryBtn->setText("MR"); setMemoryBtn=new QPu

17、shButton(this); setMemoryBtn->setText("MS"); signBtn=new QPushButton(this); signBtn->setText("302261"); addBtn=new QPushButton(this); addBtn->setText("+"); subBtn=new QPushButton(this); subBtn->setText("-"); mulBtn=new QPushButton(this); mulBtn->

18、;setText("*"); divideBtn=new QPushButton(this); divideBtn->setText("/"); right_bracket=new QPushButton(this); right_bracket->setText(")"); left_bracket=new QPushButton(this); left_bracket->setText("("); sqrtBtn=new QPushButton(this); sqrtBtn->setTe

19、xt(""); squBtn=new QPushButton(this); squBtn->setText("x²"); cubeBtn=new QPushButton(this); cubeBtn->setText("x³"); logBtn=new QPushButton(this); logBtn->setText("log"); recipBtn=new QPushButton(this); recipBtn->setText("1/x");

20、factBtn=new QPushButton(this); factBtn->setText("n!"); sinBtn=new QPushButton(this); sinBtn->setText("sin"); cosBtn=new QPushButton(this); cosBtn->setText("cos"); tanBtn=new QPushButton(this); tanBtn->setText("tan"); InBtn=new QPushButton(this); In

21、Btn->setText("In"); tenxBtn=new QPushButton(this); tenxBtn->setText("10x"); expBtn=new QPushButton(this); expBtn->setText("Exp"); sinhBtn=new QPushButton(this); sinhBtn->setText("sinh"); coshBtn=new QPushButton(this); coshBtn->setText("cosh

22、"); tanhBtn=new QPushButton(this); tanhBtn->setText("tanh"); xyBtn=new QPushButton(this); xyBtn->setText("xy"); modBtn=new QPushButton(this); modBtn->setText("Mod"); equalBtn=new QPushButton(this); equalBtn->setText("="); sumMemory=0.0; /設置樣式

23、lineEditStyle(showTextEdit,30); lineEditStyle(showResultEdit,30); pushButtonStyle(clearMemoryBtn); pushButtonStyle(readMemoryBtn); pushButtonStyle(setMemoryBtn); pushButtonStyle(signBtn); pushButtonStyle(sqrtBtn); pushButtonStyle(sinBtn); pushButtonStyle(backBtn); pushButtonStyle(ceBtn); pushButtonS

24、tyle(clearBtn); pushButtonStyle(squBtn); pushButtonStyle(cosBtn); pushButtonStyle(left_bracket); pushButtonStyle(right_bracket); pushButtonStyle(sevenBtn); pushButtonStyle(eightBtn); pushButtonStyle(nineBtn); pushButtonStyle(divideBtn); pushButtonStyle(cubeBtn); pushButtonStyle(tanBtn); pushButtonSt

25、yle(fourBtn); pushButtonStyle(fiveBtn); pushButtonStyle(sixBtn); pushButtonStyle(mulBtn); pushButtonStyle(logBtn); pushButtonStyle(InBtn); pushButtonStyle(oneBtn); pushButtonStyle(twoBtn); pushButtonStyle(threeBtn); pushButtonStyle(subBtn); pushButtonStyle(recipBtn); pushButtonStyle(tenxBtn); pushBu

26、ttonStyle(zeroBtn); pushButtonStyle(pointBtn); pushButtonStyle(addBtn); pushButtonStyle(factBtn); pushButtonStyle(equalBtn); pushButtonStyle(expBtn); pushButtonStyle(sinhBtn); pushButtonStyle(coshBtn); pushButtonStyle(tanhBtn); pushButtonStyle(xyBtn); pushButtonStyle(modBtn); /關聯信號和槽 connect(clearMe

27、moryBtn,SIGNAL(clicked(bool),this,SLOT(clearMemoryBtnSlot(); connect(readMemoryBtn,SIGNAL(clicked(bool),this,SLOT(readMemoryBtnSlot(); connect(setMemoryBtn,SIGNAL(clicked(bool),this,SLOT(setMemoryBtnSlot(); connect(signBtn,SIGNAL(clicked(bool),this,SLOT(signBtnSlot(); connect(sqrtBtn,SIGNAL(clicked(

28、bool),this,SLOT(sqrtBtnSlot(); connect(sinBtn,SIGNAL(clicked(bool),this,SLOT(sinBtnSlot(); connect(backBtn,SIGNAL(clicked(bool),this,SLOT(backBtnSlot(); connect(ceBtn,SIGNAL(clicked(bool),this,SLOT(ceBtnSlot(); connect(clearBtn,SIGNAL(clicked(bool),this,SLOT(clearBtnSlot(); connect(squBtn,SIGNAL(cli

29、cked(bool),this,SLOT(squBtnSlot(); connect(cosBtn,SIGNAL(clicked(bool),this,SLOT(cosBtnSlot(); connect(left_bracket,SIGNAL(clicked(bool),this,SLOT(left_bracketSlot(); connect(right_bracket,SIGNAL(clicked(bool),this,SLOT(right_bracketSlot(); connect(sevenBtn,SIGNAL(clicked(bool),this,SLOT(sevenBtnSlo

30、t(); connect(eightBtn,SIGNAL(clicked(bool),this,SLOT(eightBtnSlot(); connect(nineBtn,SIGNAL(clicked(bool),this,SLOT(nineBtnSlot(); connect(divideBtn,SIGNAL(clicked(bool),this,SLOT(divideBtnSlot(); connect(cubeBtn,SIGNAL(clicked(bool),this,SLOT(cubeBtnSlot(); connect(tanBtn,SIGNAL(clicked(bool),this,

31、SLOT(tanBtnSlot(); connect(fourBtn,SIGNAL(clicked(bool),this,SLOT(fourBtnSlot(); connect(fiveBtn,SIGNAL(clicked(bool),this,SLOT(fiveBtnSlot(); connect(sixBtn,SIGNAL(clicked(bool),this,SLOT(sixBtnSlot(); connect(mulBtn,SIGNAL(clicked(bool),this,SLOT(mulBtnSlot(); connect(logBtn,SIGNAL(clicked(bool),t

32、his,SLOT(logBtnSlot(); connect(InBtn,SIGNAL(clicked(bool),this,SLOT(InBtnSlot(); connect(oneBtn,SIGNAL(clicked(bool),this,SLOT(oneBtnSlot(); connect(twoBtn,SIGNAL(clicked(bool),this,SLOT(twoBtnSlot(); connect(threeBtn,SIGNAL(clicked(bool),this,SLOT(threeBtnSlot(); connect(subBtn,SIGNAL(clicked(bool)

33、,this,SLOT(subBtnSlot(); connect(recipBtn,SIGNAL(clicked(bool),this,SLOT(recipBtnSlot(); connect(tenxBtn,SIGNAL(clicked(bool),this,SLOT(tenxBtnSlot(); connect(zeroBtn,SIGNAL(clicked(bool),this,SLOT(zeroBtnSlot(); connect(pointBtn,SIGNAL(clicked(bool),this,SLOT(pointBtnSlot(); connect(addBtn,SIGNAL(c

34、licked(bool),this,SLOT(addBtnSlot(); connect(factBtn,SIGNAL(clicked(bool),this,SLOT(factBtnSlot(); connect(equalBtn,SIGNAL(clicked(bool),this,SLOT(equalBtnSlot(); connect(expBtn,SIGNAL(clicked(bool),this,SLOT(expBtnSlot(); connect(sinhBtn,SIGNAL(clicked(bool),this,SLOT(sinhBtnSlot(); connect(coshBtn

35、,SIGNAL(clicked(bool),this,SLOT(coshBtnSlot(); connect(tanhBtn,SIGNAL(clicked(bool),this,SLOT(tanhBtnSlot(); connect(xyBtn,SIGNAL(clicked(bool),this,SLOT(xyBtnSlot(); connect(modBtn,SIGNAL(clicked(bool),this,SLOT(modBtnSlot();/設置窗口布局void Caculator:widgetLayout() QGridLayout *mainLayout = new QGridLa

36、yout(this);/網格布局 mainLayout->setSizeConstraint(QLayout:SetFixedSize); mainLayout->addWidget(showTextEdit , 0,0 ,1 ,7); mainLayout->addWidget(showResultEdit,1,0,1,7); mainLayout->addWidget(clearMemoryBtn,2,0); mainLayout->addWidget(readMemoryBtn,2,1); mainLayout->addWidget(setMemory

37、Btn,2,2); mainLayout->addWidget(signBtn,2,3); mainLayout->addWidget(sqrtBtn,2,4); mainLayout->addWidget(sinBtn,2,5); mainLayout->addWidget(sinhBtn,2,6); mainLayout->addWidget(backBtn,3,0); mainLayout->addWidget(ceBtn,3,1); mainLayout->addWidget(clearBtn,3,2); mainLayout->addW

38、idget(divideBtn,3,3); mainLayout->addWidget(squBtn,3,4); mainLayout->addWidget(cosBtn,3,5); mainLayout->addWidget(coshBtn,3,6); mainLayout->addWidget(sevenBtn,4,0); mainLayout->addWidget(eightBtn,4,1); mainLayout->addWidget(nineBtn,4,2); mainLayout->addWidget(mulBtn,4,3); mainLa

39、yout->addWidget(cubeBtn,4,4); mainLayout->addWidget(tanBtn,4,5); mainLayout->addWidget(tanhBtn,4,6); mainLayout->addWidget(fourBtn,5,0); mainLayout->addWidget(fiveBtn,5,1); mainLayout->addWidget(sixBtn,5,2); mainLayout->addWidget(subBtn,5,3); mainLayout->addWidget(logBtn,5,4)

40、; mainLayout->addWidget(InBtn,5,5); mainLayout->addWidget(xyBtn,5,6); mainLayout->addWidget(oneBtn,6,0); mainLayout->addWidget(twoBtn,6,1); mainLayout->addWidget(threeBtn,6,2); mainLayout->addWidget(addBtn,6,3); mainLayout->addWidget(recipBtn,6,4); mainLayout->addWidget(tenxB

41、tn,6,5); mainLayout->addWidget(modBtn,6,6); mainLayout->addWidget(zeroBtn,7,0); mainLayout->addWidget(pointBtn,7,1); mainLayout->addWidget(left_bracket,7,2); mainLayout->addWidget(right_bracket,7,3); mainLayout->addWidget(factBtn,7,4); mainLayout->addWidget(expBtn,7,5); mainLayo

42、ut->addWidget(equalBtn,7,6);/按鈕樣式void Caculator:pushButtonStyle(QPushButton *pushButton) QFont font("宋體",12); font.setBold(true); QString styleStr="border:1px solid gray;border-radius:5px;" pushButton->setStyleSheet(styleStr); pushButton->setFont(font); pushButton->se

43、tFixedSize(45,35);/輸入框樣式void Caculator:lineEditStyle(QLineEdit *lineEdit,int height) QFont font("宋體",14); font.setBold(true); QString styleStr="border:1px solid gray;border-radius:10px;" lineEdit->setStyleSheet(styleStr); lineEdit->setReadOnly(true); lineEdit->setAlignme

44、nt(Qt:AlignRight); lineEdit->setFont(font); lineEdit->setMinimumHeight(height);/設置數字void Caculator:setNumber(int num) showTextEdit->setText(showTextEdit->text().trimmed() + QString:number(num);/設置+、-、*、/、.、)等符號void Caculator:setOperation(int oper) if(!showTextEdit->text().isEmpty() in

45、t endIndex=showTextEdit->text().length()-1; QChar endChar=showTextEdit->text().at(endIndex); if(endChar!='+'&&endChar!='-'&&endChar!='*'&&endChar!='/'&&endChar!='.'&&endChar!='(' &&endChar!='%&#

46、39;&&endChar!='') switch (oper) case 1: showTextEdit->setText(showTextEdit->text() + "+"); break; case 2: showTextEdit->setText(showTextEdit->text() + "-"); break; case 3: showTextEdit->setText(showTextEdit->text() + "*"); break; case 4

47、: showTextEdit->setText(showTextEdit->text() + "/"); break; case 5: showTextEdit->setText(showTextEdit->text() + "."); break; case 6: showTextEdit->setText(showTextEdit->text() + ")"); break; case 7: showTextEdit->setText(showTextEdit->text() + &

48、quot;"); break; case 8: showTextEdit->setText(showTextEdit->text() + "%"); break; default: break; /計算x2、x3、sin、cos、tan等void Caculator:caculate(int cacu) double result; if(!showTextEdit->text().isEmpty() QString text=showTextEdit->text(); int endIndex=text.length()-1; QChar

49、 endChar=text.at(endIndex); if(endChar!='+'&&endChar!='-'&&endChar!='*'&& endChar!='/'&&endChar!='.'&&endChar!='('&&endChar!=')' &&endChar!='%'&&endChar!='') double

50、 text_to_double=text.toDouble(); switch (cacu) case 1:/開方 if(text_to_double>=0) result=sqrt(text_to_double); showTextEdit->setText("sqrt("+QString:number(text_to_double)+")"); else QMessageBox:warning(this,"警告","<b>被開方數不能為負！</b>"); return; br

51、eak; case 2:/平方 result=pow(text_to_double,2.0); showTextEdit->setText("square("+QString:number(text_to_double)+")"); break; case 3:/立方 result=pow(text_to_double,3.0); showTextEdit->setText("cube("+QString:number(text_to_double)+")"); break; case 4:/log10

52、 result=log10(text_to_double); showTextEdit->setText("log("+QString:number(text_to_double)+")"); break; case 5:/1/x result=pow(text_to_double,-1.0); showTextEdit->setText("reciproc("+QString:number(text_to_double)+")"); break; case 6:/階乘 result=factorial(int)text_to_double); showTextEdit->setText("factorial("+QString:number(text_to_double)+")"); break; case 7:/sin result=sin(text_to_double); showT