北京邮电大学电子工程计算机实习报告.docx

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1、编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第38页 共39页 计算机实习设计报告杨抒含 20122110392014-4-16 电子工程学院目录一、倒计时器2二、小学生四则运算器6三、BMI计算器26四、以自己为原型的动画32五、程序移植安卓34六、实习总结36一、 倒计时器设计平台：Qt Creator 设计语言：c+ 平台优势：可先设计图形化界面，方便新手设计简单的图形化程序，且思路清晰。 QT方便移植，集成了特定于 Qt 的功能，如信号与槽 (Signals & Slots)图示调试器， 对 Qt 类结构可一目了然集成了 Qt Designer 可视化布局和格式构

2、建器，只需单击一下就可生成和运行 Qt 项目易于跨平台，为接下来的第六题程序移植做准备。程序截图（全屏）全屏在图形化界面设计，无代码。设计流程：部分源代码#include utimer.h#include ui_utimer.h#include #include/为了使用提示音，需添加QSound#includeUTimer:UTimer(QWidget *parent) : QWidget(parent), ui(new Ui:UTimer) ui-setupUi(this); ui-lineEdit-setInputMethodHints(Qt:ImhDigitsOnly);/输入框只能输

3、入数字，防止输入文字捣乱 ui-lineEdit-setMaxLength(4);/最多输入4位 m_timer = new QTimer(this); m_pause = false; ui-lcd_m-setDigitCount(1); ui-lcd_s-setDigitCount(1); ui-lcd_m_1-setDigitCount(1); ui-lcd_s_1-setDigitCount(1); ui-lcd_mid-setDigitCount(1); ui-lcd_mid-display(:); connect(m_timer, SIGNAL(timeout(), this, S

4、LOT(subTime();/连接 信号与槽，将图形化界面导入程序，下同。 connect(ui-button_start, SIGNAL(clicked(), this, SLOT(start(); connect(ui-button_pause, SIGNAL(clicked(), this, SLOT(pause();UTimer:UTimer() delete ui; delete m_timer;void UTimer:start() if(m_pause) m_pause = false; else setTime(this-ui-lineEdit-text().toInt();

5、while(m_time & !m_timer-isActive() m_timer-start(1000); void UTimer:pause() m_timer-stop(); m_pause = true;void UTimer:subTime() m_time-; showTime(m_time);void UTimer:showTime(const unsigned int time_ins) int m = m_time / 60;/除60取整，可提取时间的分钟数 int s = m_time % 60;/除60取余数，可提取时间的秒数 ui-lcd_m-display(m /

6、10);/同理，取分钟的十位 ui-lcd_m_1-display(m % 10);/取分钟的个位 ui-lcd_s-display(s / 10);/取秒的十位 ui-lcd_s_1-display(s % 10);/取秒的个位 QSound *tishiyin;/定义tishiyin的指针 tishiyin=new QSound(:new/prefix1/djs.wav);/指针指向提示音的位置；将提示音文件与源文件放在同一个文件夹，可以使程序具有广泛性和移植性。 if(m_time=5) tishiyin-play();/还剩5秒的时候播放提示音，起提示时间将到了的效果。void UTi

7、mer:setTime(const unsigned int time) m_time = time * 60;二、 小学生四则运算器设计平台：vs 2013设计语言：c#平台优势：c#做图形化界面也十分方便，因为计算器要出很多题，所以widgets比较多，故重复代码较多，所以采用vs2013来做程序截图设计流程：部分源代码（form.cs）using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Te

8、xt;using System.Windows.Forms;using System.Threading;namespace Examination public partial class Form1 : Form Exam exams; int page = 0; int count = 0; int flag = 0; /0：没有评分，1：已经评分 public Form1() InitializeComponent(); private void button1_Click(object sender, EventArgs e) page = 0; count = 0; int ran

9、ge = 0; try count = Convert.ToInt32(textBoxCount.Text); catch MessageBox.Show(请正确输入试题数量！); return; try range = Convert.ToInt32(textBoxRange.Text); catch MessageBox.Show(请正确输入试题范围！); return; /产生试题 exams = new Examcount; for (int i = 0; i = count) endState = count; for (int i = lPage * 10; i 0) page-;

10、 ShowExamList(page); button4.Enabled = true; else button3.Enabled = false; ShowExamMessage(page,flag); private void button4_Click(object sender, EventArgs e) if (page (count + (count%10=0?0:(10-count%10) / 10 -1) ClearExamList(); page+; ShowExamList(page); button3.Enabled = true; textBoxA1.Focus();

11、else button4.Enabled = false; button5.Focus(); ShowExamMessage(page,flag); private void button5_Click(object sender, EventArgs e) flag = 1; ShowExamMessage(page,flag); int rightExams = 0; for (int i = 0; i -1) textBoxA1.Text = examspage * 10.StAnswer.ToString(); private void textBoxA2_TextChanged(ob

12、ject sender, EventArgs e) int stAnswer = -1; try stAnswer = Convert.ToInt32(textBoxA2.Text); examspage * 10+1.StAnswer = stAnswer; catch if (examspage * 10+1.StAnswer -1) textBoxA2.Text = examspage * 10+1.StAnswer.ToString(); private void textBoxA3_TextChanged(object sender, EventArgs e) int stAnswe

13、r = -1; try stAnswer = Convert.ToInt32(textBoxA3.Text); examspage * 10 + 2.StAnswer = stAnswer; catch if (examspage * 10 + 2.StAnswer -1) textBoxA3.Text = examspage * 10 + 2.StAnswer.ToString(); private void textBoxA4_TextChanged(object sender, EventArgs e) int stAnswer = -1; try stAnswer = Convert.

14、ToInt32(textBoxA4.Text); examspage * 10 + 3.StAnswer = stAnswer; catch if (examspage * 10 + 3.StAnswer -1) textBoxA4.Text = examspage * 10 + 3.StAnswer.ToString(); private void textBoxA5_TextChanged(object sender, EventArgs e) int stAnswer = -1; try stAnswer = Convert.ToInt32(textBoxA5.Text); examspage * 10 + 4.StAnswer = stAnswer; catch if (examspage * 10 + 4.StAnswer -1) textBoxA5.Text = examspage * 10 + 4.StAnswer.ToString(); private void textBoxA6_TextChanged(object sender, EventArgs e) int stAnswer = -1; try stAnswer = Convert.T