ckp系列
ckp5.3
'''
i = 1
while i < 10:
if i % 2 ==0:
print(i)
# 无穷次
i = 1
while i < 10:
if i % 2 == 0:
print(i)
i += 1
# 无穷次
'''
i = 1
while i < 10:
if i % 2 == 0:
print(i)
i += 1
# 9次
ckp5.4
'''
count = 0
while count < 100:
print(count)
count = 0
while count < 100:
print(count)
count -= 1
count = 0
while count < 100:
count += 1
'''?
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ckp5.5
number = eval(input("Enter an integer: "))
max = number
while number != 0:
number = eval(input("Enter an integer: "))
if number > max:
max = number
print("max is ", max)
ckp5.6
number = 0
sum = 0
for count in range(5):
number = eval(input("Enter an integer: "))
sum += number
print("sum is ", sum)
print("count is ", count)
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ckp5.7
'''
yes! 每一个 while 循环都可以用 for 循环来表示。
for 循环相对于 while 循环而言更加直观，他有一个range(),所以我们知道他循环的范围。
'''ckp5.8
i = 0
sum = 0
while i < 1002:
sum += i
i += 1
print(sum)
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ckp5.9
sum = 0
for i in range(1, 10000):
sum = sum + i
if sum > 10000:
sum = sum - i
break
print(sum)
print(i)
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ckp5.10
'''
count = 0
while count < n:
count += 1
# n+1 次
for count in range(n):
print(count)
# n 次
count = 5
while count < n:
count += 1
# n-5 次
count = 5
while count < n
count = count + 3
# round((n-5)/3+1次
'''ckp5.12
# Prompt the user to enter two integers
n1 = eval(input("Enter first integer: "))
n2 = eval(input("Enter second integer: "))
gcd = 1
k = 2
while k <= round(n1 / 2) and k <= round(n2 / 2):
if n1 % k == 0 and n2 % k == 0:
gcd = k
k += 1
print("The greatest common divisor for",
n1, "and", n2, "is", gcd)
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ckp5.13
'''
break用于跳出一个循环体或者完全结束一个循环，不仅可以结束其所在的循环，还可结束其外层循环。
continue语句的作用是跳过本次循环体中剩下尚未执行的语句，立即进行下一次的循环条件判定，
可以理解为只是中止(跳过)本次循环，接着开始下一次循环。
'''
balance = 1000
while True:
if balance < 9:
break
balance = balance - 9
print("Balance is ", balance) # output = 1
balance = 1000
while True:
if balance < 9:
continue
balance = balance - 9
print("Balance is ", balance) #不会终止
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ckp5.14
sum = 0
i = 0
while i < 3:
i += 1
if i % 3 == 0:
continue
sum += i
print(sum)
'''
sum = 0
for i in range(4):
if i % 3 == 0:
continue
sum += i
print(sum)
'''?
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ckp5.15
#listings 5.11
sum = 0
number = 0
i = 0
while i < 20:
number += 1
i += 1
sum += number
if sum >= 100:
i = 20
print("The number is", number)
print("The sum is", sum)
#listings 5.12
sum = 0
number = 0
while number < 20:
number += 1
sum += number
sum = sum - 10 - 11
print("The sum is", sum)
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ckp5.16
for i in range(1, 4):
for j in range(1, 4):
if i * j > 2:
break
print(i * j)
print(i)
print()
for i in range(1, 4):
for j in range(1, 4):
if i * j > 2:
continue
print(i * j)
print(i)
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list系列
list5.2
import random
# Generate a random number to be guessed
number = random.randint(0, 100)
print("Guess a magic number between 0 and 100")
# Prompt the user to guess the number
guess = eval(input("Enter your guess: "))
if guess == number:
print("Yes, the number is", number)
elif guess > number:
print("Your guess is too high")
else:
print("Your guess is too low")
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list5.4
import random
import time
correctCount = 0# Count the number of correct answers
count = 0# Count the number of questions
NUMBER_OF_QUESTIONS = 5# Constant
startTime = time.time() # Get start time
while count < NUMBER_OF_QUESTIONS:
# Generate two random single-digit integers
number1 = random.randint(0, 9)
number2 = random.randint(0, 9)
# If number1 < number2, swap number1 with number2
if number1 < number2:
number1, number2 = number2, number1
answer = eval(input("What is " + str(number1) + " - " +
str(number2) + "? "))
if number1 - number2 == answer:
print("You are correct!")
correctCount +=1
else:
print("Your answer is wrong.\n", number1, "-",
number2, "is", number1 - number2)
count += 1
endTime = time.time() # Get end time
testTime = int(endTime - startTime) # Get test time
print("Correct count is", correctCount, "out of",
NUMBER_OF_QUESTIONS, "\nTest time is", testTime, "seconds")
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list5.6
print(" Multiplication Table")
# Display the number title
print(" |", end = '')
for j in range(1, 10):
print(" ", j, end = '')
print() # Jump to the new line
print("——————————————————————————————————————————")
# Display table body
for i in range(1, 10):
print(i, "|", end = '')
for j in range(1, 10):
print(format(i * j, "4d"), end = '')
print() # Jump to the new line
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list5.14
import turtle
from random import randint
turtle.speed(1) # Set turtle speed to slowest
# Draw 16-by-16 lattice
turtle.color("gray") # Color for lattice
x = -80
for y in range(-80, 80 + 1, 10):
turtle.penup()
turtle.goto(x, y) # Draw a horizontal line
turtle.pendown()
turtle.forward(160)
y = 80
turtle.right(90)
for x in range(-80, 80 + 1, 10):
turtle.penup()
turtle.goto(x, y) # Draw a vertical line
turtle.pendown()
turtle.forward(160)
turtle.pensize(3)
turtle.color("red")
turtle.penup()
turtle.goto(0, 0) # Go to the center
turtle.pendown()
x = y = 0 # Current pen location at the center of lattice
while abs(x) < 80 and abs(y) < 80:
r = randint(0, 3)
if r ==0:
x += 10 # Walk right
turtle.setheading(0)
turtle.forward(10)
elif r == 1:
y -= 10 # Walk down
turtle.setheading(270)
turtle.forward(10)
elif r == 2:
x -= 10 # Walk left
turtle.setheading(180)
turtle.forward(10)
elif r == 3:
y += 10 # Walk up
turtle.setheading(90)
turtle.forward(10)
turtle.done()?
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sec系列
sec5.3
print("Kilograms " + " Pounds")
for i in range(1, 200, 2):
j = 2.2 * i
#print(format(j, ".1f").rjust(20))
print(str(i).ljust(5), format(j, ".1f").rjust(15))
'''
ljust and rjust use in str, ljust左对齐，rjust右对齐
'''
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sec5.5
print("Kilograms\t" + "Pounds\t" + "|\t" + "Pounds\t" + "Kilogorams\t")
p = 0
for i in range(1, 200, 2):
j = 2.2 * i
# 给第二组数据准备
p += 1
m = 15 + p * 5
n = m * 0.45
print(str(i).ljust(5), format(j, ".1f").rjust(15),
"\t", m, "\t", format(n, ".2f").rjust(8))
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sec5.16
# Prompt the user to enter two integers
n1 = eval(input("Enter first integer: "))
n2 = eval(input("Enter second integer: "))
d = min(n1, n2)
gcd = d
for i in range(d + 1, 1, -1):
if n1 % i == 0 and n2 % i == 0:
gcd = i
break
print("The greatest common divisor for",
n1, "and", n2, "is", gcd)
'''
while k <= n1 and k <= n2:
if n1 % k == 0 and n2 % k == 0:
gcd = k
k += 1
'''
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sec5.19
这个金字塔我想了很多的办法，什么居中显示，靠右靠左都试过（ljust，rjust，format等），靠右的时候在10以内显示都很成果，但是10往后就出来金字塔了，歪歪扭扭的，我不满意。于是我想了一种很笨的办法，用 \t 的方式来表示，虽然很笨，但是效果却很好，如果你们有很好的方法请务必告诉我，在此多蟹！！！
附上邮箱：jhtfine@qq.com
n = eval(input("Enter the number of lines: "))
for i in range(1, n + 1):
a = "\t"
for k in range(i, n + 1):
a = "\t" + a
for j in range(1, i + 1):
a += (str(i - j + 1) + "\t") # 从大到小
for j in range(2, i + 1):
a += (str(j) + "\t") # 从小到大
print(a)
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sec5.20
print("Pattern A")
for i in range(7):
a = "\t"
for j in range(1, i + 1):
a = a + str(j) + "\t"
print(a)
print("Pattern B")
for i in range(6, 0, -1):
a = "\t"
for j in range(1, i + 1):
a = a + str(j) + "\t"
print(a)
print("Pattern C")
for i in range(7):
a = "\t"
for k in range(i, 6):
a = a + "\t"
for j in range(i, 0, -1):
a = a + str(j) + "\t"
print(a)
print("Pattern D")
for i in range(6, 0, -1):
a = "\t"
for k in range(i, 6):
a = a + "\t"
for j in range(1, i + 1):
a = a + str(j) + "\t"
print(a)
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sec5.47
import turtle
import random
turtle.pensize(3)
turtle.hideturtle()
turtle.penup()
turtle.goto(-60, 50)
turtle.pendown()
turtle.goto(60, 50)
turtle.goto(60, -50)
turtle.goto(-60, -50)
turtle.goto(-60, 50)
#turtle.done()
turtle.pensize(5)
turtle.pencolor("red")
for i in range(11):
turtle.penup()
x = random.randint(-60, 60)
y = random.randint(-50, 50)
turtle.goto(x, y)
turtle.pendown()
turtle.goto(x, y)
turtle.done()
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sec5.55
这道棋盘题也稍有难度，我用的方法也很笨，用了两个很长的 for 语句，我总觉得有更好的办法，但是碍于我能力和时间有限，只能做到这种程度了，望见谅！！！
import turtle
from random import randint
turtle.speed(20)
turtle.color("gray")
x = -80
for y in range(-80, 80 + 1, 20):
turtle.penup()
turtle.goto(x, y) # Draw a horizontal line
turtle.pendown()
turtle.forward(160)
y = 80
turtle.right(90)
for x in range(-80, 80 + 1, 20):
turtle.penup()
turtle.goto(x, y) # Draw a vertical line
turtle.pendown()
turtle.forward(160)
for x in range(-80, 40 + 1, 40):
for y in range(-60, 60 + 1, 40):
turtle.penup()
turtle.goto(x, y)
turtle.pendown()
turtle.begin_fill()
turtle.color("black")
turtle.forward(20)
turtle.left(90)
turtle.forward(20)
turtle.left(90)
turtle.forward(20)
turtle.left(90)
turtle.forward(20)
turtle.left(90)
turtle.end_fill()
for x in range(-60, 60 + 1, 40):
for y in range(-40, 80 + 1, 40):
turtle.penup()
turtle.goto(x, y)
turtle.pendown()
turtle.begin_fill()
turtle.color("black")
turtle.forward(20)
turtle.left(90)
turtle.forward(20)
turtle.left(90)
turtle.forward(20)
turtle.left(90)
turtle.forward(20)
turtle.left(90)
turtle.end_fill()
turtle.hideturtle()
turtle.done()
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