qt编程简单的计算器Word文件下载.docx

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qt编程简单的计算器Word文件下载.docx

project(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<

QApplication>

QDialog>

QPushButton>

QLineEdit>

classCalculator:

publicQDialog

{

Q_OBJECT

protected:

QLineEdit*lineEditor;

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*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_clicked();

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_clicked();

};

#endif//CALCULATOR_H

Calculator.cpp代码:

QLayout>

QHBoxLayout>

QVBoxLayout>

cmath>

#include"

calculator.h"

Calculator:

:

Calculator()

num1=0;

num2=0;

result=0;

zhenghao=true;

mark=1;

lineEditor=newQLineEdit("

0"

);

S="

"

;

button_0=newQPushButton("

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=newQPushButton("

9"

button_ce=newQPushButton("

CE"

button_cheng=newQPushButton("

*"

button_jia=newQPushButton("

+"

button_jian=newQPushButton("

-"

button_chu=newQPushButton("

/"

button__=newQPushButton("

+/-"

button_dengyu=newQPushButton("

="

QHBoxLayout*Hl1=newQHBoxLayout;

QHBoxLayout*Hl2=newQHBoxLayout;

QHBoxLayout*Hl3=newQHBoxLayout;

QHBoxLayout*Hl4=newQHBoxLayout;

QHBoxLayout*Hl5=newQHBoxLayout;

Hl1->

addWidget(lineEditor);

addWidget(button_ce);

Hl2->

addWidget(button_1);

addWidget(button_2);

addWidget(button_3);

addWidget(button_jia);

Hl3->

addWidget(button_4);

addWidget(button_5);

addWidget(button_6);

addWidget(button_jian);

Hl4->

addWidget(button_7);

addWidget(button_8);

addWidget(button_9);

addWidget(button_cheng);

Hl5->

addWidget(button__);

addWidget(button_0);

addWidget(button_dengyu);

addWidget(button_chu);

QVBoxLayout*V1=newQVBoxLayout;

V1->

addLayout(Hl1);

addLayout(Hl2);

addLayout(Hl3);

addLayout(Hl4);

addLayout(Hl5);

connect(button_0,SIGNAL(clicked()),this,SLOT(button_0_clicked()));

connect(button_1,SIGNAL(clicked()),this,SLOT(button_1_clicked()));

connect(button_2,SIGNAL(clicked()),this,SLOT(button_2_clicked()));

connect(button_3,SIGNAL(clicked()),this,SLOT(button_3_clicked()));

connect(button_4,SIGNAL(clicked()),this,SLOT(button_4_clicked()));

connect(button_5,SIGNAL(clicked()),this,SLOT(button_5_clicked()));

connect(button_6,SIGNAL(clicked()),this,SLOT(button_6_clicked()));

connect(button_7,SIGNAL(clicked()),this,SLOT(button_7_clicked()));

connect(button_8,SIGNAL(clicked()),this,SLOT(button_8_clicked()));

connect(button_9,SIGNAL(clicked()),this,SLOT(button_9_clicked()));

connect(button_jia,SIGNAL(clicked()),this,SLOT(button_jia_clicked()));

connect(button_jian,SIGNAL(clicked()),this,SLOT(button_jian_clicked()));

connect(button_cheng,SIGNAL(clicked()),this,SLOT(button_cheng_clicked()));

connect(button_chu,SIGNAL(clicked()),this,SLOT(button_chu_clicked()));

connect(button_dengyu,SIGNAL(clicked()),this,SLOT(button_dengyu_clicked()));

connect(button_ce,SIGNAL(clicked()),this,SLOT(button_ce_clicked()));

connect(button__,SIGNAL(clicked()),this,SLOT(button__clicked()));

setLayout(V1);

}

voidCalculator:

button_0_clicked()

S+="

lineEditor->

setText(S);

if(mark==1){

num1=num1*10+0;

}else{

num2=num2*10;

}

button_1_clicked(){

if(zhenghao){

num1=num1*10+1;

num1=num1*10-1;

num2=num2*10+1;

num2=num2*10-1;

button_2_clicked(){

num1=num1*10+2;

num1=num1*10-2;

num2=num2*10+2;

num2=num2*10-2;

button_3_clicked(){

num1=num1*10+3;

num1=num1*10-3;

num2=num2*10+3;

num2=num2*10-3;

button_4_clicked(){

num1=num1*10+4;

num1=num1*10-4;

num2=num2*10+4;

num2=num2*10-4;

button_5_clicked(){

num1=num1*10+5;

num1=num1*10-5;

num2=num2*10+5;

num2=num2*10-5;

button_6_clicked(){

num1=num1*10+6;

num1=num1*10-6;

num2=num2*10+6;

num2=num2*10-6;

button_7_clicked(){

num1=num1*10+7;

num1=num1*10-7;

num2=num2*10+7;

num2=num2*10-7;

button_8_clicked(){

num1=num1*10+8;

num1=num1*10-8;

num2=num2*10+8;

num2=num2*10-8;

button_9_clicked(){

num1=num1*10+9;

num1=num1*10-9;

num2=num2*10+9;

num2=num2*10-9;

button_jia_clicked(){

fuhao='

+'

mark=2;

button_jian_clicked(){

-'

button_cheng_clicked(){

*'

button_chu_clicked(){

/'

button__clicked(){

zhenghao=false;

button_dengyu_clicked(){

//lineEditor->

switch(fuhao){

case'

result=num1+num2;

break;

result=num1-num2;

result=num1*num2;

if(num2)result=num1/num2;

inti=0;

intresult1=result;

while(result1){

i++;

result1/=10;

for(;

i;

i--){

S+=(result/(int)pow(10,i-1)+'

0'

result%=(int)pow(10,i-1);

num1=num2=0;

button_ce_clicked()

setText("

Main代码:

intmain(intargc,char*argv[])

QApplicationapp(argc,argv);

Calculatorcal;

cal.show();

returnapp.exec();

运行结果

四、总结

通过计算器设计,学到了利用Qt设计简单窗口应用程序的的方法,初步了解了使用QT工具编写窗口程序的新颖,了解了槽和信号等基本知识,学会了如何使用新工具(Qt)帮助程序开发。

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