//在3t2目录下
//adder.h
/*
qt简单加法计算器
*/
#ifndef ADDER_H
#define ADDER_H
#include<QDialog>
#include<QLineEdit>
#include<QtWidgets/QPushButton>
#include<QtWidgets/QLabel>
class Adder:public QDialog{
Q_OBJECT//让自定义的槽函数生效
private:
QLineEdit * add1;
QLabel * oper;
QLineEdit *add2;
QPushButton * equ;
QLineEdit * res;
QPushButton * bclose;
public:
Adder();
~Adder();
/*自定义槽函数*/
public slots:
void getres();
};
#endif
//adder.cpp
#include "adder.h"
/*#include<QDialog>
#include<QLineEdit>
#include<QtWidgets/QPushButton>
#include<QtWidgets/QLabel>
*/
Adder::Adder(){
this->resize(400,300);
add1=new QLineEdit(this);
add1->resize(80,20);
add1->move(0,20);
oper=new QLabel("+",this);
oper->resize(20,20);
oper->move(80,20);
add2=new QLineEdit(this);
add2->resize(80,20);
add2->move(100,20);
equ=new QPushButton("=",this);
equ->resize(20,20);
equ->move(180,20);
res=new QLineEdit(this);
res->resize(80,20);
res->move(200,20);
bclose=new QPushButton("close",this);
bclose->resize(80,20);
bclose->move(160,160);
connect(bclose,SIGNAL(clicked()),this,SLOT(close()));
connect(equ,SIGNAL(clicked()),this,SLOT(getres()));
}
Adder::~Adder(){
delete add1;
delete oper;
delete add2;
delete equ;
delete res;
delete bclose;
}
void Adder::getres(){
int c=add1->text().toInt()+add2->text().toInt();
/*
QString qa=add1->text();
QString qb=add2->text();
int a=qa.toInt();
int b=qb.toInt();
int c=a+b;
*/
res->setText(QString::number(c));
}
//qq.h
/*模拟qq登陆*/
#ifndef QQ_H
#define QQ_H
#include<QDialog>
#include<QLineEdit>
#include<QtWidgets/QPushButton>
#include<QtWidgets/QLabel>
class QQ:public QDialog
{
Q_OBJECT
private:
QLineEdit * username;
QLineEdit* userpwd;
QPushButton * login;
QPushButton* cancel;
public:
QQ();
~QQ();
/*函数，登陆和退出*/
public slots:
void loginAndcancel();
};
#endif
//qq.cpp
#include "qq.h"
QQ::QQ()
{
this->resize(400,300);
username=new QLineEdit(this);
username->resize(80,20);
username->move(60,20);
userpwd=new QLineEdit(this);
userpwd->resize(80,20);
userpwd->move(60,50);
userpwd->setEchoMode(QLineEdit::Password);
login=new QPushButton("login",this);
login->resize(60,20);
login->move(20,80);
cancel=new QPushButton("cancel",this);
cancel->resize(60,20);
cancel->move(100,80);
connect(login,SIGNAL(clicked()),this,SLOT(loginAndcancel()));
connect(cancel,SIGNAL(clicked()),this,SLOT(loginAndcancel()));
}
QQ::~QQ()
{
delete username;
delete userpwd;
delete login;
delete cancel;
}
#include<QMessageBox>
void QQ::loginAndcancel()
{
/**/
QPushButton *b=(QPushButton*)sender();
if(b->text()=="login"){
if(username->text()=="admin"&& userpwd->text()=="123"){
qDebug("login success!");
}
else{
qDebug("login failed");
}
}
else if(b->text()=="cancel"){
QMessageBox msg;//退出时提示
msg.setText("要退出吗？");
msg.setStandardButtons(QMessageBox::Yes|QMessageBox::No);
if(msg.exec()==QMessageBox::Yes){
this->close();
}
}
}
//gettime.h
/*界面显示获取的当前时间 */
#ifndef GETTIME_H
#define GETTIME_H
#include<QDialog>
#include<QLineEdit>
#include<QtWidgets/QPushButton>
#include<QtWidgets/QLabel>
class GetTime:public QDialog{
Q_OBJECT
private:
QLabel *res;
QPushButton *gettime;
public:
GetTime();
~GetTime();
public slots:
void settime();
//方案2，信号连接
public:signals:
void ssettime(QString par);
};
#endif
//gettime.cpp
#include "gettime.h"
GetTime::GetTime()
{
this->resize(400,300);
res=new QLabel("Cur Time",this);
gettime=new QPushButton("gettime",this);
gettime->move(0,50);
connect(gettime,SIGNAL(clicked()),this,SLOT(settime()));
connect(this,SIGNAL(ssettime(QString)),res,SLOT(setText(QString)));
//connect(this);
}
GetTime::~GetTime()
{
delete res;
delete gettime;
}
#include<QTime>
/*
#include<time.h>
#include<stdio.h>
*/
void GetTime::settime(){
/*
struct tm *tm1=localtime(time(0));
char buf[200];
sprintf(buf,"%4d-%2d-%2d %2d:%2d:%2d",tm1->tm_year+1700,
tm1->tm_mon+1,tm1->tm_mday,
tm1->tm_hour,tm1->tm_min,tm1->tm_sec);
res->setText(buf);
*/
/*
//1 直接调用res槽函数，设置值
res->setText(QTime::currentTime().toString("HH:mm:ss"));
*/
/*方案2,发送带参数的信号，再由信号参数去触发res的槽函数 emit */
emit ssettime(QTime::currentTime().toString("HH:mm:ss"));
}
//main.cpp
/*测试上面三个功能 */
/*
qt做简单的加法计算器
*/
#include<QApplication>
#include "adder.h"
#include "qq.h"
#include "gettime.h"
int main(int argc,char * argv[])
{
QApplication app(argc,argv);
/*简单加法器
Adder add1;
add1.show();
*/
/*qq登陆框
QQ qq;
qq.show();
*/
/**/
GetTime t;
t.show();
//qDebug("output");//在控制台上输出信息
app.exec();
}
qtday02 qt做简单的加法器和模拟登陆功能,布布扣,bubuko.com
qtday02 qt做简单的加法器和模拟登陆功能
原文：http://blog.csdn.net/pukuimin1226/article/details/29399625
