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c++实现带界面简单计算器
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说明
编辑器使用vs2010，界面设计采用qt4.8.6
本计算器只简单实现带括号的四则运算
界面部分
采用qt直接拖拽，设计如下
几乎是自动生成 #ifndef UI_MYCLASS_H #define UI_MYCLASS_H #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include QT_BEGIN_NAMESPACE class Ui_MyClassClass { public: QWidget *centralWidget; QVBoxLayout *verticalLayout; QLabel *label; QLineEdit *line; QGridLayout *gridLayout; QPushButton *btn1; QPushButton *btn2; QPushButton *btn3; QPushButton *btn4; QPushButton *btn5; QPushButton *btn6; QPushButton *btn7; QPushButton *btn8; QPushButton *btn9; QPushButton *btn0; QPushButton *btnend; QPushButton *btnclear; QPushButton *btnl; QPushButton *btnr; QPushButton *btnadd; QPushButton *btnminus; QPushButton *btn; QPushButton *btnmul; QPushButton *btndivide; QMenuBar *menuBar; QToolBar *mainToolBar; QStatusBar *statusBar; void setupUi(QMainWindow *MyClassClass) { if (MyClassClass->objectName().isEmpty()) MyClassClass->setObjectName(QString::fromUtf8("MyClassClass")); MyClassClass->resize(377, 385); centralWidget = new QWidget(MyClassClass); centralWidget->setObjectName(QString::fromUtf8("centralWidget")); verticalLayout = new QVBoxLayout(centralWidget); verticalLayout->setSpacing(6); verticalLayout->setContentsMargins(11, 11, 11, 11); verticalLayout->setObjectName(QString::fromUtf8("verticalLayout")); label = new QLabel(centralWidget); label->setObjectName(QString::fromUtf8("label")); verticalLayout->addWidget(label); line = new QLineEdit(centralWidget); line->setObjectName(QString::fromUtf8("line")); verticalLayout->addWidget(line); gridLayout = new QGridLayout(); gridLayout->setSpacing(6); gridLayout->setObjectName(QString::fromUtf8("gridLayout")); btn1 = new QPushButton(centralWidget); btn1->setObjectName(QString::fromUtf8("btn1")); gridLayout->addWidget(btn1, 0, 0, 1, 1); btn2 = new QPushButton(centralWidget); btn2->setObjectName(QString::fromUtf8("btn2")); gridLayout->addWidget(btn2, 0, 1, 1, 1); btn3 = new QPushButton(centralWidget); btn3->setObjectName(QString::fromUtf8("btn3")); gridLayout->addWidget(btn3, 0, 2, 1, 1); btn4 = new QPushButton(centralWidget); btn4->setObjectName(QString::fromUtf8("btn4")); gridLayout->addWidget(btn4, 1, 0, 1, 1); btn5 = new QPushButton(centralWidget); btn5->setObjectName(QString::fromUtf8("btn5")); gridLayout->addWidget(btn5, 1, 1, 1, 1); btn6 = new QPushButton(centralWidget); btn6->setObjectName(QString::fromUtf8("btn6")); gridLayout->addWidget(btn6, 1, 2, 1, 1); btn7 = new QPushButton(centralWidget); btn7->setObjectName(QString::fromUtf8("btn7")); gridLayout->addWidget(btn7, 2, 0, 1, 1); btn8 = new QPushButton(centralWidget); btn8->setObjectName(QString::fromUtf8("btn8")); gridLayout->addWidget(btn8, 2, 1, 1, 1); btn9 = new QPushButton(centralWidget); btn9->setObjectName(QString::fromUtf8("btn9")); gridLayout->addWidget(btn9, 2, 2, 1, 1); btn0 = new QPushButton(centralWidget); btn0->setObjectName(QString::fromUtf8("btn0")); gridLayout->addWidget(btn0, 3, 0, 1, 1); btnend = new QPushButton(centralWidget); btnend->setObjectName(QString::fromUtf8("btnend")); gridLayout->addWidget(btnend, 3, 1, 1, 1); btnclear = new QPushButton(centralWidget); btnclear->setObjectName(QString::fromUtf8("btnclear")); gridLayout->addWidget(btnclear, 3, 2, 2, 1); btnl = new QPushButton(centralWidget); btnl->setObjectName(QString::fromUtf8("btnl")); gridLayout->addWidget(btnl, 4, 0, 1, 1); btnr = new QPushButton(centralWidget); btnr->setObjectName(QString::fromUtf8("btnr")); gridLayout->addWidget(btnr, 4, 1, 1, 1); btnadd = new QPushButton(centralWidget); btnadd->setObjectName(QString::fromUtf8("btnadd")); gridLayout->addWidget(btnadd, 5, 0, 1, 1); btnminus = new QPushButton(centralWidget); btnminus->setObjectName(QString::fromUtf8("btnminus")); gridLayout->addWidget(btnminus, 5, 1, 1, 1); btn = new QPushButton(centralWidget); btn->setObjectName(QString::fromUtf8("btn")); gridLayout->addWidget(btn, 5, 2, 2, 1); btnmul = new QPushButton(centralWidget); btnmul->setObjectName(QString::fromUtf8("btnmul")); gridLayout->addWidget(btnmul, 6, 0, 1, 1); btndivide = new QPushButton(centralWidget); btndivide->setObjectName(QString::fromUtf8("btndivide")); gridLayout->addWidget(btndivide, 6, 1, 1, 1); verticalLayout->addLayout(gridLayout); MyClassClass->setCentralWidget(centralWidget); menuBar = new QMenuBar(MyClassClass); menuBar->setObjectName(QString::fromUtf8("menuBar")); menuBar->setGeometry(QRect(0, 0, 377, 26)); MyClassClass->setMenuBar(menuBar); mainToolBar = new QToolBar(MyClassClass); mainToolBar->setObjectName(QString::fromUtf8("mainToolBar")); MyClassClass->addToolBar(Qt::TopToolBarArea, mainToolBar); statusBar = new QStatusBar(MyClassClass); statusBar->setObjectName(QString::fromUtf8("statusBar")); MyClassClass->setStatusBar(statusBar); retranslateUi(MyClassClass); QMetaObject::connectSlotsByName(MyClassClass); } // setupUi void retranslateUi(QMainWindow *MyClassClass) { MyClassClass->setWindowTitle(QApplication::translate("MyClassClass", "\350\256\241\347\256\227\345\231\250", 0, QApplication::UnicodeUTF8)); label->setText(QApplication::translate("MyClassClass", "\350\257\267\350\276\223\345\205\245\344\270\200\344\270\252\344\273\245#\347\273\223\345\260\276\347\232\204\347\256\227\345\274\217", 0, QApplication::UnicodeUTF8)); btn1->setText(QApplication::translate("MyClassClass", "1", 0, QApplication::UnicodeUTF8)); btn2->setText(QApplication::translate("MyClassClass", "2", 0, QApplication::UnicodeUTF8)); btn3->setText(QApplication::translate("MyClassClass", "3", 0, QApplication::UnicodeUTF8)); btn4->setText(QApplication::translate("MyClassClass", "4", 0, QApplication::UnicodeUTF8)); btn5->setText(QApplication::translate("MyClassClass", "5", 0, QApplication::UnicodeUTF8)); btn6->setText(QApplication::translate("MyClassClass", "6", 0, QApplication::UnicodeUTF8)); btn7->setText(QApplication::translate("MyClassClass", "7", 0, QApplication::UnicodeUTF8)); btn8->setText(QApplication::translate("MyClassClass", "8", 0, QApplication::UnicodeUTF8)); btn9->setText(QApplication::translate("MyClassClass", "9", 0, QApplication::UnicodeUTF8)); btn0->setText(QApplication::translate("MyClassClass", "0", 0, QApplication::UnicodeUTF8)); btnend->setText(QApplication::translate("MyClassClass", "#", 0, QApplication::UnicodeUTF8)); btnclear->setText(QApplication::translate("MyClassClass", "\345\210\240\351\231\244", 0, QApplication::UnicodeUTF8)); btnl->setText(QApplication::translate("MyClassClass", "(", 0, QApplication::UnicodeUTF8)); btnr->setText(QApplication::translate("MyClassClass", ")", 0, QApplication::UnicodeUTF8)); btnadd->setText(QApplication::translate("MyClassClass", "+", 0, QApplication::UnicodeUTF8)); btnminus->setText(QApplication::translate("MyClassClass", "-", 0, QApplication::UnicodeUTF8)); btn->setText(QApplication::translate("MyClassClass", "\350\256\241\347\256\227", 0, QApplication::UnicodeUTF8)); btnmul->setText(QApplication::translate("MyClassClass", "*", 0, QApplication::UnicodeUTF8)); btndivide->setText(QApplication::translate("MyClassClass", "/", 0, QApplication::UnicodeUTF8)); } // retranslateUi }; namespace Ui { class MyClassClass: public Ui_MyClassClass {}; } // namespace Ui QT_END_NAMESPACE #endif // UI_MYCLASS_H 功能方面 界面部分
main.cpp #include "myclass.h" #include int main(int argc, char *argv[]) { QApplication a(argc, argv); MyClass w; w.show(); return a.exec(); }myclass.cpp #include "myclass.h" #include "QMessageBox" using namespace std; MyClass::MyClass(QWidget *parent, Qt::WFlags flags) : QMainWindow(parent, flags) { ui.setupUi(this); connect(ui.btn,SIGNAL(clicked()),this,SLOT(Onbtn())); connect(ui.btn1,SIGNAL(clicked()),this,SLOT(Onbtn1())); connect(ui.btn2,SIGNAL(clicked()),this,SLOT(Onbtn2())); connect(ui.btn3,SIGNAL(clicked()),this,SLOT(Onbtn3())); connect(ui.btn4,SIGNAL(clicked()),this,SLOT(Onbtn4())); connect(ui.btn5,SIGNAL(clicked()),this,SLOT(Onbtn5())); connect(ui.btn6,SIGNAL(clicked()),this,SLOT(Onbtn6())); connect(ui.btn7,SIGNAL(clicked()),this,SLOT(Onbtn7())); connect(ui.btn8,SIGNAL(clicked()),this,SLOT(Onbtn8())); connect(ui.btn9,SIGNAL(clicked()),this,SLOT(Onbtn9())); connect(ui.btn0,SIGNAL(clicked()),this,SLOT(Onbtn0())); connect(ui.btnadd,SIGNAL(clicked()),this,SLOT(Onbtnadd())); connect(ui.btnminus,SIGNAL(clicked()),this,SLOT(Onbtnminus())); connect(ui.btnmul,SIGNAL(clicked()),this,SLOT(Onbtnmul())); connect(ui.btndivide,SIGNAL(clicked()),this,SLOT(Onbtndivide())); connect(ui.btnend,SIGNAL(clicked()),this,SLOT(Onbtnend())); connect(ui.btnl,SIGNAL(clicked()),this,SLOT(Onbtnl())); connect(ui.btnr,SIGNAL(clicked()),this,SLOT(Onbtnr())); connect(ui.btnclear,SIGNAL(clicked()),this,SLOT(Onbtnclear())); } MyClass::~MyClass() { } template class stack { private: int data[100]; int count; public: void Stack(); int empty(); int full(); int get_top(); void push(t x); void pop(); }; template void stack::Stack() { count=0; } template int stack::empty() { if(count==0) return 1; else return 0; } template int stack::full() { if(count==100) return 1; else return 0; } template int stack::get_top() { if(empty()==0) return data[count-1]; } template void stack::push(t x) { if(full()==0) { data[count]=x; count++; } } template void stack::pop() { if(empty()==0) count--; } int numbers(string nu,int i)//用来判断是数字还是运算符 { if(nu[i]>='0'&&nu[i]=priority(character))//比顶优先就入栈 { sym.push(ch[i]); i++; } else//比顶差就运算 { if(character=='-') { number=num.get_top(); num.pop(); number=num.get_top()-number; num.pop(); num.push(number); } else if(character=='+') { number=num.get_top(); num.pop(); number=num.get_top()+number; num.pop(); num.push(number); } else if(character=='*') { number=num.get_top(); num.pop(); number=num.get_top()*number; num.pop(); num.push(number); } else if(character=='/') { number=num.get_top(); num.pop(); number=num.get_top()/number; num.pop(); num.push(number); } sym.pop(); if(priority(ch[i])>priority(sym.get_top()))//只有当前遍历到的运算符比顶大时才将其入栈，并向下遍历 { sym.push(ch[i]); i++; } else continue; } } } return num.get_top();//输出运算结果 } int MyClass::Onbtn1() { expression+="1"; ui.line->setText(expression); return 0; } int MyClass::Onbtn2() { expression+="2"; ui.line->setText(expression); return 0; } int MyClass::Onbtn3() { expression+="3"; ui.line->setText(expression); return 0; } int MyClass::Onbtn4() { expression+="4"; ui.line->setText(expression); return 0; } int MyClass::Onbtn5() { expression+="5"; ui.line->setText(expression); return 0; } int MyClass::Onbtn6() { expression+="6"; ui.line->setText(expression); return 0; } int MyClass::Onbtn7() { expression+="7"; ui.line->setText(expression); return 0; } int MyClass::Onbtn8() { expression+="8"; ui.line->setText(expression); return 0; } int MyClass::Onbtn9() { expression+="9"; ui.line->setText(expression); return 0; } int MyClass::Onbtn0() { expression+="0"; ui.line->setText(expression); return 0; } int MyClass::Onbtnadd() { expression+="+"; ui.line->setText(expression); return 0; } int MyClass::Onbtnminus() { expression+="-"; ui.line->setText(expression); return 0; } int MyClass::Onbtnmul() { expression+="*"; ui.line->setText(expression); return 0; } int MyClass::Onbtndivide() { expression+="/"; ui.line->setText(expression); return 0; } int MyClass::Onbtnend() { expression+="#"; ui.line->setText(expression); return 0; } int MyClass::Onbtnl() { expression+="("; ui.line->setText(expression); return 0; } int MyClass::Onbtnr() { expression+=")"; ui.line->setText(expression); return 0; } int MyClass::Onbtnclear() { ui.line->setText(""); expression=""; return 0; } int MyClass::Onbtn() { QString line=ui.line->text(); string ch; int c; ch = string((const char *)line.toLocal8Bit());//将QString转化为string c=calculate(ch);//计算 ch= to_string(static_cast(c));//将返回的int转化为string line= QString(QString::fromLocal8Bit(ch.c_str()));//将string转化为QString QMessageBox::information(this,"result",line);//显示结果 return 0; }myclass.h #ifndef MYCLASS_H #define MYCLASS_H #include #include "ui_myclass.h" class MyClass : public QMainWindow { Q_OBJECT public: MyClass(QWidget *parent = 0, Qt::WFlags flags = 0); ~MyClass(); private slots: int Onbtn(); int Onbtn1(); int Onbtn2(); int Onbtn3(); int Onbtn4(); int Onbtn5(); int Onbtn6(); int Onbtn7(); int Onbtn8(); int Onbtn9(); int Onbtn0(); int Onbtnadd(); int Onbtnminus(); int Onbtnmul(); int Onbtndivide(); int Onbtnend(); int Onbtnl(); int Onbtnr(); int Onbtnclear(); private: Ui::MyClassClass ui; QString expression; }; #endif // MYCLASS_H |
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