<!doctype html>LCD Number使用
LCD Number使用
随机数
rand产生随机数//产生随机数要设置种子如果不设置种子产生的随机数会重复srand设置种子
qsrand(QTime(0,0,0).secsTo(QTime::currentTime())); //以0时0分0秒到现在的秒数为种子
srand((unsigned)time(NULL));//利用c++的方式设置随机数；
qrand()%100 //产生一个0-99的随机数，并返回
lcd显示
设置LCD Number显示 ui->lcdNumber->display()；//参数QString
文本框追加：
ui->textEdit->append("要追加的字符")；
猜数字源码
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MainWindow::MainWindow(QWidget *parent) :
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QMainWindow(parent),
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ui(new Ui::MainWindow)
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{
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ui->setupUi(this);
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qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
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inum = qrand()%2;
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connect(ui->btn0,SIGNAL(clicked(bool)),this,SLOT(doProcessClinknum()));
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connect(ui->btn1,SIGNAL(clicked(bool)),this,SLOT(doProcessClinknum()));
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connect(ui->btn2,SIGNAL(clicked(bool)),this,SLOT(doProcessClinknum()));
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connect(ui->btn3,SIGNAL(clicked(bool)),this,SLOT(doProcessClinknum()));
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connect(ui->btn4,SIGNAL(clicked(bool)),this,SLOT(doProcessClinknum()));
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connect(ui->btn5,SIGNAL(clicked(bool)),this,SLOT(doProcessClinknum()));
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connect(ui->btn6,SIGNAL(clicked(bool)),this,SLOT(doProcessClinknum()));
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connect(ui->btn7,SIGNAL(clicked(bool)),this,SLOT(doProcessClinknum()));
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connect(ui->btn8,SIGNAL(clicked(bool)),this,SLOT(doProcessClinknum()));
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connect(ui->btn9,SIGNAL(clicked(bool)),this,SLOT(doProcessClinknum()));
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connect(ui->btn_in,SIGNAL(clicked(bool)),this,SLOT(doProcessClinknum()));
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connect(ui->btn_out,SIGNAL(clicked(bool)),this,SLOT(doProcessClinknum()));
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}
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MainWindow::~MainWindow()
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{
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delete ui;
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}
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void MainWindow::doProcessClinknum (){
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QPushButton * one =(QPushButton *)sender();
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if(one->text()=="确认"){
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bool ok=0;
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if(inum==num.toInt(&ok)&&ok)
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{
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ui->textEdit->append("输入正确");
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}else if(inum<num.toInt(&ok)&&ok){
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ui->textEdit->append("输入过大");
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}else if(inum>num.toInt(&ok)&&ok){
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ui->textEdit->append("输入过小");
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}else{
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ui->textEdit->append("错误");
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}
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//qDebug()<<inum<<endl;
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num="0";
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}else if(one->text()=="取消"){
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this->close();
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}else{
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num=num+one->text();
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}
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ui->lcdNumber->display(num);
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// qDebug()<<name<<endl;
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qDebug()<<num<<endl;
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}