软件工程（2019）结对编程第二次作业
1.组员
- 吕浩杰 163401010521
- 刁子其 163401010520
2.Github
3.各部分功能截图
（1）界面设计
- 单选按钮：整数运算，分数运算，上次记录
- 点击按钮：退格，清除，开始，下一题，提交
- 显示框：出题框，正确答案显示框，正确率显示框，题目数量显示框，答对题目数量显示框
- 输入框：答案输入框
- 代码实现
import sys
import os
import math
from PyQt5 import QtWidgets, QtGui, QtCore
class Button(QtWidgets.QToolButton):
def __init__(self, text, parent=None):
super(Button, self).__init__(parent)
self.setSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Preferred)
self.setText(text)
def sizeHint(self):
size = super(Button, self).sizeHint()
size.setHeight(size.height() + 20)
size.setWidth(max(size.width(), size.height()))
return size
class Calculator(QtWidgets.QWidget):
def __init__(self, parent=None):
super(Calculator, self).__init__(parent)
self.predStr = ""
self.succStr = ""
self.questionSum = 0
self.correctCount = 0
self.correctPercent = 0
self.fraction_list = []
self.errorQuestionList = []
self.lastQuestionList = []
self.index = 3
global lcd
lcd = QtWidgets.QTextBrowser()
lcd.setFixedHeight(60)
lcd.setFont(QtGui.QFont("Microsoft YaHei", 20))
lcd.setText('0'.decode('utf-8'))
global lcd_correct_answer
lcd_correct_answer = QtWidgets.QTextBrowser()
lcd_correct_answer.setFixedHeight(40)
lcd_correct_answer.setFont(QtGui.QFont("Microsoft YaHei", 13))
lcd_correct_answer.setText("".decode('utf-8'))
global lcd_correct_percent
lcd_correct_percent = QtWidgets.QTextBrowser()
lcd_correct_percent.setFixedHeight(40)
lcd_correct_percent.setFont(QtGui.QFont("Microsoft YaHei", 13))
lcd_correct_percent.setText("".decode('utf-8'))
global lcd_question_sum
lcd_question_sum = QtWidgets.QTextBrowser()
lcd_question_sum.setFixedHeight(40)
lcd_question_sum.setFont(QtGui.QFont("Microsoft YaHei", 13))
lcd_question_sum.setText("".decode('utf-8'))
global lcd_correct_count
lcd_correct_count = QtWidgets.QTextBrowser()
lcd_correct_count.setFixedHeight(40)
lcd_correct_count.setFont(QtGui.QFont("Microsoft YaHei", 13))
lcd_correct_count.setText('0'.decode('utf-8'))
self.intButton = QtWidgets.QRadioButton(u"整数运算")
self.fractionButton = QtWidgets.QRadioButton(u"分数数运算")
self.lastErrorQuestionButton = QtWidgets.QRadioButton(u"上次记录")
self.backspaceButton = self.createButton(u"退格", self.backspaceClicked)
self.clearAllButton = self.createButton(u"清除", self.clearAll)
self.start = self.createButton(u"开始", self.start)
self.next_question = self.createButton(u"下一题", self.next_question)
self.label1 = QtWidgets.QLabel(u'请输入答案')
self.label2 = QtWidgets.QLabel(u'正确答案')
self.label3 = QtWidgets.QLabel(u'正确率')
self.label4 = QtWidgets.QLabel(u'当前题目数量')
self.label5 = QtWidgets.QLabel(u'答对数目')
self.submitButton = self.createButton(u"提交", self.submit_answer)
self.inputLabel = QtWidgets.QLineEdit(u'')
font = self.inputLabel.font()
font.setPointSize(font.pointSize() + 8)
self.inputLabel.setFixedHeight(40)
self.inputLabel.setFont(font)
mainLayout = QtWidgets.QGridLayout()
mainLayout.setSizeConstraint(QtWidgets.QLayout.SetFixedSize)
mainLayout.addWidget(lcd, 0, 0, 1, 8)
mainLayout.addWidget(self.intButton, 1, 0, 1, 2)
mainLayout.addWidget(self.fractionButton, 1, 3, 1, 2)
mainLayout.addWidget(self.lastErrorQuestionButton, 1, 6, 1, 2)
mainLayout.addWidget(self.backspaceButton, 2, 0, 1, 4)
mainLayout.addWidget(self.clearAllButton, 2, 4, 1, 4)
mainLayout.addWidget(self.start, 3, 0, 1, 4)
mainLayout.addWidget(self.next_question, 3, 4, 1, 4)
mainLayout.addWidget(self.label1, 4, 0, 1, 2)
mainLayout.addWidget(self.inputLabel, 4, 2, 1, 2)
mainLayout.addWidget(self.submitButton, 4, 4, 1, 4)
mainLayout.addWidget(self.label2, 5, 0, 1, 2)
mainLayout.addWidget(lcd_correct_answer, 5, 2, 1, 2)
mainLayout.addWidget(self.label3, 5, 4, 1, 2)
mainLayout.addWidget(lcd_correct_percent, 5, 6, 1, 2)
mainLayout.addWidget(self.label4, 6, 0, 1, 2)
mainLayout.addWidget(lcd_question_sum, 6, 2, 1, 2)
mainLayout.addWidget(self.label5, 6, 4, 1, 2)
mainLayout.addWidget(lcd_correct_count,6, 6, 1, 2)
self.setLayout(mainLayout)
self.setWindowTitle(u"随机出题计算器 (注：保留小数点后1位)")
def closeEvent(self, event):
reply = QtWidgets.QMessageBox.question(self, '确认退出', '你确定要退出么？',
QtWidgets.QMessageBox.Yes,
QtWidgets.QMessageBox.No
)
if reply == QtWidgets.QMessageBox.Yes:
self.errorQuestionList.insert(0, str(self.correctPercent))
self.errorQuestionList.insert(1, str(self.questionSum))
self.errorQuestionList.insert(2, str(self.correctCount))
Question_write.question_write(self.errorQuestionList)
event.accept()
else:
event.ignore()
def createButton(self, text, member):
button = Button(text)
button.clicked.connect(member)
return button
(2)整数出题:
- 首先点击“整数运算”单选按钮，随后点击“开始”按钮，然后屏幕上会随机出现整数运算的题目，可以在答案输入框输入答案，点击“提交”按钮，会显示出题目的正确答案，以及正确率和答对题目数量。
- 整数实现代码
# _*_ coding: utf-8 _*_
__author__ = 'XiaoDong-Hu and Huanli-Xu'
__date__ = '2017/4/30 16:01'
pri = {'+': 1, '-': 1,
'*': 2, '/': 2,
'\0': 0
}
class Stack:
def __init__(self):
self.items = []
def isEmpty(self):
return len(self.items)==0
def push(self, item):
self.items.append(item)
def pop(self):
return self.items.pop()
def top(self):
if not self.isEmpty():
return self.items[len(self.items)-1]
def size(self):
return len(self.items)
def printf(self):
for i in self.items:
print i
def readNumber(str, currentIndex):
int_num = 0
decimal_num = 0.0
intCount = 0
decimalCount = 0
currentIndex1 = 0
for i in range(currentIndex, len(str)):
if str[i] < '0' or str[i] > '9':
currentIndex1 = i
break
intCount = intCount + 1
for i in range(currentIndex, currentIndex + intCount):
index = currentIndex + intCount - i - 1
times = 10**(index)
digit = int(str[i]) * times
int_num += digit
if str[currentIndex1] == '.':
for i in range(currentIndex1 + 1, len(str)):
if str[i] < '0' and str[i] > '9':
break
decimalCount = decimalCount + 1
for i in range(currentIndex + 1, currentIndex + 1 + decimalCount):
digit = int(str[i]) * 1/(10^(currentIndex + decimalCount - i))
decimal_num += digit
return int_num + decimal_num
else:
return int_num
def Calculating(infixStr):
opnd = Stack()
optr = Stack()
optr.push('\0')
infixStr = infixStr + '\0'
i = 0
while not optr.isEmpty():
if infixStr[i] >= '0' and infixStr[i] <= '9':
number = readNumber(infixStr, i)
opnd.push(number)
i = i + len(str(number)) -1
else:
if pri[infixStr[i]] > pri[optr.top() ]:
optr.push(infixStr[i])
elif pri[infixStr[i]] <= pri[optr.top()] and optr.top() != '\0':
opr2 = float(opnd.top())
opnd.pop()
opr1 = opnd.top()
opnd.pop()
if optr.top() == '+':
op = opr1 + opr2
opnd.push(op)
opnd.printf()
if optr.top() == '-':
op = opr1 - opr2
opnd.push(op)
if optr.top() == '*':
op = opr1 * opr2
opnd.push(op)
if optr.top() == '/':
op = opr1 / opr2
opnd.push(op)
optr.pop()
i = i - 1
else:
optr.pop()
i = i + 1
print opnd.top()
return opnd.top()
- 随机出题实现代码
# _*_ coding: utf-8 _*_
__author__ = 'XiaoDong-Hu and Huanli-Xu'
__date__ = '2017/5/6 20:26'
import random
from fractions import Fraction
def Random_int_question():
oprator_list = ['', '+', '-', '*', '/']
num_size = random.randint(3, 4)
opr_size = num_size - 1
question_str = ""
i = 0
while i < num_size:
question_str += str(random.randint(1, 15)) + str(oprator_list[random.randint(1, 4)])
i = i + 1
question_str = question_str[0: len(question_str) - 1]
return question_str
(3)分数运算:
-
首先点击“分数运算”单选按钮，其余部分同整数运算。
-
随机出题并计算实现代码
def Random_fraction_question():
oprator_list = ['', '+', '-', '*', '/']
num_size = 2
question_str = ""
question_list = []
i = 0
opr_num = []
oprator = []
while i < num_size:
f = Fraction(random.randint(1, 15), random.randint(1, 15))
opr_num.append(f)
oprator.append(oprator_list[random.randint(1, 4)])
if f.numerator >= f.denominator:
int_num = f.numerator / f.denominator
numerator = f.numerator % f.denominator
question_str += str(int_num) + "\'" + str(numerator) + '/' + str(f.denominator) + " " + str(oprator[i]) + " "
else:
question_str += str(f) + " " +str(oprator[i]) + " "
i = i + 1
question_str = question_str[0: len(question_str) - 2]
if oprator[0] == '+':
answer = opr_num[0] + opr_num[1]
elif oprator[0] == '-':
answer = opr_num[0] - opr_num[1]
elif oprator[0] == '*':
answer = opr_num[0] * opr_num[1]
else:
answer = opr_num[0] / opr_num[1]
print answer
if answer.numerator >= answer.denominator:
answer_ = str(answer.numerator/answer.denominator) + "\'" + str(answer.numerator%answer.denominator) + "/" + str(answer.denominator)
question_list.append(question_str)
question_list.append(answer_)
question_list.append(question_str)
question_list.append(answer)
return question_list
(4)退格功能
- 点击“退格”按钮以后，会清除表达式的最后一个字符。
- 退格前：
- 退格后：
- 退格代码实现
def backspaceClicked(self):
self.predStr = self.predStr[0:len(self.predStr) - 1]
if len(self.predStr) == 0:
lcd.setText('0'.decode('utf-8'))
lcd.setText(self.predStr)
(5)清屏
-
在点击“清除”按钮以后，屏幕上会置0，清除掉原有表达式。
-
清除前：
-
清除后：
-
退格代码实现
def clearAll(self):
self.predStr = ""
self.succStr = ""
lcd.setText('0'.decode('utf-8'))
(6)重启以后保持上次记录
-
重启后会记忆上次答题数目以及正确率和答对题的数目，随后点击“上次记录”单选按钮，可以重做上次做错的题目。
-
保持上次记录的代码实现
# _*_ coding: utf-8 _*_
__author__ = 'XiaoDong-Hu and Huanli-Xu'
__date__ = '2017/5/7 15:29'
import os
def question_write(errorList):
with open('store.txt', 'w') as f:
for item in errorList:
item = item + '\n'
f.write(item)
f.close()
# _*_ coding: utf-8 _*_
__author__ = 'XiaoDong-Hu and Huanli-Xu'
__date__ = '2017/5/7 15:29'
import os
def question_read():
lastQuestionList = []
with open('store.txt', 'r') as f:
for item in f.readlines():
item = item[0:len(item) - 1]
lastQuestionList.append(item)
f.close()
return lastQuestionList
4.心得体会
- 认真学会一门计算机语言并且精通与它，是很重要的！我在编写程序的过程中，如何生成带括号的四则运算表达式，想了半天没想起来。在网上搜索一下，发现自己没有完全看懂，一些算法不会，自己尝试编写，但是没有成功，最后不得已放弃了。在写生成小数表达式的函数时，也是遇到了各种错误，不过好在最终解决了。但是自己的代码重复的地方太多，没有想到好的办法解决，只能写成这个样子，还有这个代码有许多漏洞，比如说能生成重复的表达式，一些表达式结果不是很正确等等，要改进的地方还有很多。希望自己能多多写写代码，增强自己的代码能力，提高自己的算法思想
- 通过这次实验，我更深刻的理解了团队合作的重要性，这次实验对于我个人来说是很有难度的，在做这次实验的过程中，遇到了很多方面的问题，也发现了自己很多的不足之处，而这种团队合作正好给我们提供了有利的条件，我们可以借助队友的帮忙，从而更快的完成实验。这次实验中，我发现了自己在专业知识方面很薄弱，希望以后在团队合作中能学到更多知识！
