城市建设理论研究官方网站,电脑软件推广,网站开发哪个工具,网站交换链接的网络营销意义项目源码和资源#xff1a;科目一考试系统: qt实现科目一考试系统 一.项目概述 该项目是一个基于Qt框架开发的在线考试系统#xff0c;主要实现了考试题目的随机抽取、考试时间限制、成绩统计等功能。用户可以通过界面操作进行考试#xff0c;并查看自己的考试成绩。 二.技… 项目源码和资源科目一考试系统: qt实现科目一考试系统 一.项目概述 该项目是一个基于Qt框架开发的在线考试系统主要实现了考试题目的随机抽取、考试时间限制、成绩统计等功能。用户可以通过界面操作进行考试并查看自己的考试成绩。 二.技术栈 Qt框架、C语言、GUI设计、数据结构、算法等。 三.界面展示
1.登录界面 2.答题界面 3.提交界面 四.代码展示
1.核心要点 整体项目共分为两个部分登录界面和答题界面登录界面使用的qt设计器进行手动设计登录界面核心的点在于使用正则表达式对已有账号进行分析答题界面核心则是对文件中的试题进行处理。 2.登录界面代码
#ifndef LOGINDIALOG_H
#define LOGINDIALOG_H#include QDialogQT_BEGIN_NAMESPACE
namespace Ui { class LoginDialog; }
QT_END_NAMESPACEclass LoginDialog : public QDialog
{Q_OBJECTpublic:LoginDialog(QWidget *parent nullptr);~LoginDialog();private slots:void on_pushButtonOk_clicked();void on_pushButtonCancel_clicked();private:Ui::LoginDialog *ui;private:void InitUI();
};
#endif // LOGINDIALOG_H
#include logindialog.h
#include ui_logindialog.h
#includeQIcon
#includeQMessageBox
#includeQFile
#includeQTextStreamLoginDialog::LoginDialog(QWidget *parent): QDialog(parent), ui(new Ui::LoginDialog)
{ui-setupUi(this);InitUI();
}LoginDialog::~LoginDialog()
{delete ui;
}void LoginDialog::InitUI()
{//设置窗口大小int wideui-labelimage-width();int heightui-labelimage-height();this-setGeometry(600,300,wide,height);this-setWindowTitle(科目一考试系统);this-setWindowFlags(Qt::Dialog|Qt::WindowTitleHint);}void LoginDialog::on_pushButtonOk_clicked()
{QRegExp rx(^[a-zA-Z][\\w]{5,17}([A-Za-z0-9\\-]\\.)[A-Za-z]{2,6}$);bool res rx.exactMatch(ui-lineEditaccount-text());if(!res){//匹配不成功QMessageBox::information(this,提示,非法的邮箱地址请你重新输入);ui-lineEditaccount-clear();ui-lineEditpassword-clear();ui-lineEditaccount-setFocus();//设置光标return;}else{//匹配成功了QString filename; //账号密码数据文件QString strAccInput;//用户输入的账号QString strCode; //用户输入的密码QString strLine; //每次读取的一行数据QStringList strList;//保存分割读取的一行数据filename account.txt;//发布时要进行修改strAccInput ui-lineEditaccount-text();//账号strCode ui-lineEditpassword-text();//密码QFile file(filename);QTextStream stream(file);if( file.open(QIODevice::ReadOnly | QIODevice::Text) ){while(!stream.atEnd()){strLine stream.readLine();strList strLine.split(,);if(strAccInput strList.at(0))//账号匹配成功{if(strCode strList.at(1)){//密码匹配成功QMessageBox::information(this,提示,欢迎进入科目一考试系统);file.close();done(Accepted);return;}else{QMessageBox::information(this,提示,您输入的密码有误请重新输入);ui-lineEditpassword-clear();ui-lineEditpassword-setFocus();file.close();return;}}QMessageBox::information(this,提示,您输入的账号有误请重新输入);ui-lineEditaccount-clear();ui-lineEditpassword-clear();ui-lineEditaccount-setFocus();file.close();return;}}else{QMessageBox::information(this,提示,读取账号数据文件失败);return;}}}void LoginDialog::on_pushButtonCancel_clicked()
{//关闭窗口this-close();
} 3.答题界面代码
#ifndef EXAMDIALOG_H
#define EXAMDIALOG_H
#include QDialog
#include QTimer
#include QTextEdit
#include QLabel
#include QRadioButton
#include QCheckBox
#include QGridLayout
#include QButtonGroupclass ExamDialog : public QDialog
{Q_OBJECT
public:ExamDialog(QWidget* parent 0);void initTimer(); //初始化计时器void initLayout(); //初始化布局管理器bool initTextEdit();//初始化文本编辑器void initButtons(); //初始化按钮及标签bool hasNoSelect(); //判断题目是否有未完成的
private:QTimer *m_timer; //计时器int m_timeGo; //考试已用时QTextEdit *m_textEdit; //考试题库显示QLabel *m_titleLabels[10]; //题目标签QButtonGroup *m_btnGroups[9]; //单项按钮分组QRadioButton *m_radioBtns[32]; //单选题按钮QCheckBox *m_checkBtns[4]; //多选题按钮QRadioButton *m_radioA; //判断题A选项QRadioButton *m_radioB; //判断题B选项QGridLayout *m_layout; //布局管理器QStringList m_answerList; //答案private slots:void freshTime(); //刷新考试时间void getScore(); //获取考试成绩
};#endif // EXAMDIALOG_H#include examdialog.h
#include QFile
#include QTextStream
#include QMessageBox
#include QApplication
#include QPushButtonExamDialog::ExamDialog(QWidget* parent):QDialog(parent)
{//设置字体大小QFont font;font.setPointSize(12);setFont(font);//设置窗体背景颜色setPalette(QPalette(QColor(209,215,255)));setWindowTitle(考试已用时0分0秒);setWindowFlags(Qt::Dialog | Qt::WindowCloseButtonHint);resize(800,900);initTimer();initLayout();if(!initTextEdit()){QMessageBox::information(this,提示,初始化题库数据文件失败);QTimer::singleShot(0,qApp,SLOT(quit()));}initButtons();show();
}void ExamDialog::initTimer()
{m_timeGo 0;m_timer new QTimer(this);m_timer-setInterval(1000);m_timer-start();connect(m_timer,SIGNAL(timeout()),this,SLOT(freshTime()));
}void ExamDialog::initLayout()
{m_layout new QGridLayout(this);m_layout-setSpacing(10); //设置控件间的间距m_layout-setMargin(10); //设置窗体与控件间的间隙
}bool ExamDialog::initTextEdit()
{QString strLine; //保存文件中读取到的一行数据QStringList strList; //保存读取到的答案行QString fileName(exam.txt);QFile file(fileName);QTextStream stream(file);stream.setCodec(UTF-8);if( file.open(QIODevice::ReadOnly | QIODevice::Text) ){m_textEdit new QTextEdit(this);m_textEdit-setReadOnly(true);QString strText; //用于保存显示到文本编辑器的数据int nLines 0;while(!stream.atEnd()){//过滤首行if(nLines 0){stream.readLine();nLines;continue;}//过滤答案行if( (nLines 6 nLines 6 * 9 (nLines % 6 0) )|| (nLines 6 * 9 4) ){strLine stream.readLine();strList strLine.split( );m_answerList.append(strList.at(1));strText \n;nLines;continue;}strText stream.readLine();strText \n;nLines;}m_textEdit-setText(strText);m_layout-addWidget(m_textEdit,0,0,1,10);file.close();return true;}else{return false;}
}void ExamDialog::initButtons()
{QStringList strList {A,B,C,D};for(int i 0; i 10; i){//题目标签m_titleLabels[i] new QLabel(this);m_titleLabels[i]-setText(第 QString::number(i1) 题);m_layout-addWidget(m_titleLabels[i],1,i);//判断题if(i 9){m_radioA new QRadioButton(this);m_radioB new QRadioButton(this);m_radioA-setText(正确);m_radioB-setText(错误);m_layout-addWidget(m_radioA,2,9);m_layout-addWidget(m_radioB,3,9);m_btnGroups[8] new QButtonGroup(this);m_btnGroups[8]-addButton(m_radioA);m_btnGroups[8]-addButton(m_radioB);break;}if(i 8) m_btnGroups[i] new QButtonGroup(this);//选择题for(int j 0; j 4; j){if( i 8){//多项多选题m_checkBtns[j] new QCheckBox(this);m_checkBtns[j]-setText(strList.at(j));m_layout-addWidget(m_checkBtns[j],2j,8);}else{//单项选择题m_radioBtns[4 * i j] new QRadioButton(this);m_radioBtns[4 * i j]-setText(strList.at(j));m_layout-addWidget(m_radioBtns[4 * i j],2j,i);m_btnGroups[i]-addButton(m_radioBtns[4 * i j]);}}}QPushButton *submitBtn new QPushButton(this);submitBtn-setText(提交);submitBtn-setFixedSize(100,35);connect(submitBtn,SIGNAL(clicked(bool)),this,SLOT(getScore()));m_layout-addWidget(submitBtn,6,9);
}bool ExamDialog::hasNoSelect()
{int radioSelects 0;for(int i 0; i 8; i){if( m_btnGroups[i]-checkedButton() )radioSelects;}if(radioSelects ! 8)return true;int checkSelects 0;for(int i 0; i 4; i){if(m_checkBtns[i]-isChecked())checkSelects;}if(checkSelects 0 || checkSelects 1)return true;if(!m_radioA-isChecked() !m_radioB-isChecked())return true;return false;
}void ExamDialog::freshTime()
{m_timeGo;QString min QString::number(m_timeGo / 60);QString sec QString::number(m_timeGo % 60);setWindowTitle(考试已用时 min 分 sec 秒);
}void ExamDialog::getScore()
{if(hasNoSelect()){QMessageBox::information(this,提示,您有未完成的题目请完成考试,是);return;}int scores 0;for(int i 0; i 10; i){//单选题计分if( i 8)if(m_btnGroups[i]-checkedButton()-text() m_answerList.at(i))scores 10;//多项选择题计分if(i 8){QString answer m_answerList.at(i);bool hasA false;bool hasB false;bool hasC false;bool hasD false;if( answer.contains(A) ) hasA true;if( answer.contains(B) ) hasB true;if( answer.contains(C) ) hasC true;if( answer.contains(D) ) hasD true;bool checkA m_checkBtns[0]-checkState();bool checkB m_checkBtns[1]-checkState();bool checkC m_checkBtns[2]-checkState();bool checkD m_checkBtns[3]-checkState();if( hasA ! checkA) continue;if( hasB ! checkB) continue;if( hasC ! checkC) continue;if( hasD ! checkD) continue;scores 10;}//判断题计分if(i 9){if(m_btnGroups[8]-checkedButton()-text() m_answerList.at(i))scores 10;}}QString str 您的分数是 QString::number(scores) 分是否重新考试;int res QMessageBox::information(this,提示,str,QMessageBox::Yes | QMessageBox::No);if(res QMessageBox::Yes)return;elseclose();
}
