311 lines
12 KiB
Python
311 lines
12 KiB
Python
# ==============================================================================
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# 通过 D:\文档\电子文档\个人\脚本库\PythonScript\第8章.py + 题号 运行
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# 程序名：
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# 第8章习题
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# 目的:
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#
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# 修订记录:
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# 日期 编程者 改动描述
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# =================== ============= =====================================
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# 2021-07-29 22:27:49 Sola 8-1 ~ 8-3 略
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# 2021-07-29 22:31:50 Sola 8-4 Syracuse序列
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# 2021-07-29 22:55:15 Sola 8-5 素数判断
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# 2021-07-29 23:23:41 Sola 8-6 找出每一个素数
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# 2021-07-30 19:13:22 Sola 8-7 哥德巴赫猜想
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# 2021-07-30 19:21:14 Sola 8-8 最大公约数
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# 2021-07-30 20:00:17 Sola 8-9 计算燃油效率
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# 2021-07-30 20:00:28 Sola 8-10 从文件读入数据，计算燃油效率
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# 2021-07-30 20:18:47 Sola 8-11 加热度天、制冷度天
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# 2021-07-30 20:19:01 Sola 8-12 从文件读入计算加热度天、制冷度天
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# 2021-07-30 20:21:57 Sola 8-13 回归线绘制
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# 2021-07-30 21:01:56 Sola 8-14 图像转灰度并保存
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# 2021-07-30 21:52:08 Sola 8-15 图形转补色并保存
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# 2021-07-30 21:58:42 Sola 8-16 event_loop3，增加ESC退出文本框的功能
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def Test8_4():
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intNum = int(input("请输入一个正整数："))
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if intNum > 0:
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while intNum != 1:
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print("{0}, ".format(intNum), end="")
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if intNum % 2 == 0:
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intNum = intNum // 2
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else:
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intNum = 3 * intNum + 1
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print(1)
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else:
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print("警告：输入值非法！")
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def Test8_5():
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def IsPrimeNum(intNum):
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# 循环到底类型
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result = True
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if intNum > 1:
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for i in range(2, intNum // 2 + 1):
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if intNum % i == 0:
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result = False
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break
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else:
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print("警告：输入值非法！")
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result = -1
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return result
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def IsPrimeNum1(intNum):
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# 每次循环逐步优化
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result = True
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if intNum > 1:
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i = 2
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end = intNum
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while i < end:
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if intNum % i == 0:
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result = False
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break
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else:
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i = i + 1
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end = intNum // i + 1
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print("共进行{0}次运算".format(i))
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else:
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print("警告：输入值非法！")
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result = -1
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return result
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def IsPrimeNum2(intNum):
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# 根据原理直接限定最大循环次数
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result = True
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if intNum > 1:
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for i in range(2, int(intNum ** 0.5) + 1):
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if intNum % i == 0:
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result = False
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break
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else:
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print("警告：输入值非法！")
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result = -1
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return result
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intNum = int(input("请输入一个大于1正整数："))
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if intNum > 1:
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if IsPrimeNum2(intNum):
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print("{0}是素数".format(intNum))
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else:
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print("{0}不是素数".format(intNum))
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else:
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print("警告：输入值非法！")
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def IsPrimeNum(intNum):
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# 根据原理直接限定最大循环次数
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result = True
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if intNum > 1:
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for i in range(2, int(intNum ** 0.5) + 1):
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if intNum % i == 0:
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result = False
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break
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else:
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print("警告：输入值非法！")
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result = -1
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return result
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def Test8_6():
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intNum = int(input("请输入一个正整数："))
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if int(intNum) > 1:
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print("小于{0}的素数包括：".format(intNum), end='')
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print("2", end='')
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for i in range(3, intNum + 1):
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if IsPrimeNum(i):
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print(", {0}".format(i), end='')
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print("\n")
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else:
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print("警告：输入值非法！")
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def Test8_7():
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inputNum = int(input("请输入一个偶数："))
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if inputNum % 2 == 0:
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for i in range(2, inputNum // 2 + 1):
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if IsPrimeNum(i) and IsPrimeNum(inputNum - i):
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print("{0}和{1}是和为{2}的两个素数".format(i, inputNum - i, inputNum))
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break
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else:
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print("警告：输入值非偶数！")
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def Test8_8():
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inputList = input("请输入两个正整数：").split(",")
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m, n = int(inputList[0]), int(inputList[1])
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while m != 0:
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n, m = m, n % m
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print("{0}和{1}的最大公约数是：{2}".format(int(inputList[0]), int(inputList[1]), n))
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def Test8_9():
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mileage = float(input("请输入开始时里程表的读数："))
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mileageOld = mileage
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fuelSum = 0
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while True:
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temp = input("\n请输入当前的里程表读数和燃油使用量（空格分隔）：")
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if temp:
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infoList = temp.split()
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mileageNow, fuel = float(infoList[0]), float(infoList[1])
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print("当前路段的燃油效率为{0:.3f}MPG".format((mileageNow - mileageOld) / fuel))
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fuelSum = fuelSum + fuel
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mileageOld = mileageNow
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else:
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print("\n总路段的燃油效率为{0:.3f}MPG".format((mileageOld - mileage) / fuelSum))
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break
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def Test8_10():
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from tkinter.filedialog import askopenfilename
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inputFile = open(askopenfilename())
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mileage = float(inputFile.readline())
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mileageOld = mileage
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fuelSum = 0
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while True:
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temp = inputFile.readline()
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if temp:
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infoList = temp.split()
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mileageNow, fuel = float(infoList[0]), float(infoList[1])
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print("当前路段的燃油效率为{0:.3f}MPG".format((mileageNow - mileageOld) / fuel))
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fuelSum = fuelSum + fuel
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mileageOld = mileageNow
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else:
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print("总路段的燃油效率为{0:.3f}MPG".format((mileageOld - mileage) / fuelSum))
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break
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def Test8_11():
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temperatureList = input("请输入平均温度序列：").split()
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heatSum = 0
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refrSum = 0
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for i in temperatureList:
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if float(i) > 80:
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refrSum = refrSum + float(i) - 80
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elif float(i) < 60:
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heatSum = heatSum + 60 - float(i)
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print("加热度天和制冷度天分别为：{0}, {1}".format(heatSum, refrSum))
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def Test8_12():
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from tkinter.filedialog import askopenfilename
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temperatureList = open(askopenfilename()).readline().split()
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heatSum = 0
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refrSum = 0
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for i in temperatureList:
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if float(i) > 80:
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refrSum = refrSum + float(i) - 80
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elif float(i) < 60:
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heatSum = heatSum + 60 - float(i)
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print("加热度天和制冷度天分别为：{0}, {1}".format(heatSum, refrSum))
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def Test8_13():
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from graphics import Point, Line, Rectangle, Text, GraphWin
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win = GraphWin("绘制回归线", 400, 400)
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win.setCoords(0, 0, 400, 400)
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doneButtom = Rectangle(Point(10, 10), Point(60, 30))
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doneButtom.setFill("white")
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doneButtom.setOutline("black")
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doneButtom.draw(win)
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doneText = Text(Point(35, 20), "Done")
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doneText.draw(win)
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i = 0
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sumX, sumY, sumXY, sumX2 = 0, 0, 0, 0
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while True:
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pointTemp = win.getMouse()
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pointTemp.setFill("red")
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x, y = pointTemp.getX(), pointTemp.getY()
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if abs(x - 35) <= 15 and abs(y - 20) <= 10:
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if i >= 2:
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doneButtom.undraw()
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doneText.undraw()
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averageX, averageY = sumX / i, sumY / i
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if sumX2 - i * averageX ** 2 != 0:
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m = (sumXY - i * averageX * averageY) / (sumX2 - i * averageX ** 2)
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Line(Point(0, averageY + m * (0 - averageX)), Point(400, averageY + m * (400 - averageX))).draw(win)
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else:
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Line(Point(averageX, 0), Point(averageX, 400)).draw(win)
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break
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else:
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print("点位太少了！")
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else:
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pointTemp.clone().draw(win)
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i = i + 1
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sumX, sumY, sumXY, sumX2 = sumX + x, sumY + y, sumXY + x * y, sumX2 + x ** 2
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Text(Point(200, 20), "Click again to quit").draw(win)
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win.getMouse()
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def Test8_14():
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from tkinter.filedialog import askopenfilename, asksaveasfilename
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from graphics import Image, GraphWin, Point, color_rgb
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imageDir = askopenfilename()
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imageFile = Image(Point(0, 0), imageDir)
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imageHeight, imageWidth = imageFile.getHeight(), imageFile.getWidth()
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win = GraphWin("图片转灰度", width=imageWidth, height=imageHeight)
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win.setCoords(-imageWidth / 2, -imageHeight / 2, imageWidth / 2, imageHeight / 2)
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imageFile.draw(win)
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size = imageHeight * imageWidth
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for i in range(0, imageWidth):
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for j in range(0, imageHeight):
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r, g, b = imageFile.getPixel(i, j)
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brightness = int(round(0.299 * r + 0.587 * g + 0.114 * b))
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imageFile.setPixel(i, j, color_rgb(brightness, brightness, brightness))
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print("\r进度：{0:6.2f}%".format((i * imageHeight + j) / size * 100), end='')
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imageFile.save(asksaveasfilename())
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win.getMouse()
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def Test8_15():
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from tkinter.filedialog import askopenfilename, asksaveasfilename
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from graphics import Image, GraphWin, Point, color_rgb
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imageDir = askopenfilename()
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imageFile = Image(Point(0, 0), imageDir)
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imageHeight, imageWidth = imageFile.getHeight(), imageFile.getWidth()
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win = GraphWin("图片转灰度", width=imageWidth, height=imageHeight)
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win.setCoords(-imageWidth / 2, -imageHeight / 2, imageWidth / 2, imageHeight / 2)
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imageFile.draw(win)
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size = imageHeight * imageWidth
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for i in range(0, imageWidth):
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for j in range(0, imageHeight):
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r, g, b = imageFile.getPixel(i, j)
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imageFile.setPixel(i, j, color_rgb(255 - r, 255 - g, 255 - b))
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print("\r进度：{0:6.2f}%".format((i * imageHeight + j) / size * 100), end='')
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imageFile.save(asksaveasfilename())
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win.getMouse()
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def Test8_16():
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from graphics import GraphWin, Entry, Text
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def handleKey(k, win):
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if k == "r":
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win.setBackground("pink")
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elif k == "w":
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win.setBackground("white")
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elif k == "g":
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win.setBackground("lightgray")
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elif k == "b":
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win.setBackground("lightblue")
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def handleClick(pt, win):
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# create an Entry for user to type in
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entry = Entry(pt, 10)
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entry.draw(win)
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# Go modal: loop until user types <Enter> key
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while True:
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key = win.getKey()
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if key == "Return":
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entry.undraw()
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typed = entry.getText()
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Text(pt, typed).draw(win)
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# clear (ignore) any mouse click that occurred during text entry
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win.checkMouse()
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break
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if key == "Escape":
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entry.undraw()
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break
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# undraw the entry and create and draw Text0
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win = GraphWin("Click and Type", 500, 500)
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# Event Loop: handle key presses and mouse clicks until the user
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# presses the "q" key.
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while True:
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key = win.checkKey()
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if key == "q": # loop exit
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break
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if key:
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handleKey(key, win)
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pt = win.checkMouse()
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if pt:
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handleClick(pt, win)
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win.close()
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import sys
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def Run(num):
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eval("Test8_" + num + "()")
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Run(sys.argv[1]) |