10以?xún)?nèi)的加法

設(shè)計(jì)一個(gè)程序，幫助小學(xué)生練習(xí)10以?xún)?nèi)的加法

詳情:

- 隨機(jī)生成加法題目;

- 學(xué)生查看題目并輸入答案;

- 判別學(xué)生答題是否正確?

- 退出時(shí), 統(tǒng)計(jì)學(xué)生答題總數(shù),正確數(shù)量及正確率(保留兩位小數(shù)點(diǎn))；

import random

num = 0

for i in range(11):

x = random.randint(0,10)

y = random.randint(0,10)

print("%d+%d=" %(x,y),end='')

val=int(input())

if val == (x+y):

num+=1

print("true")

else:

print("false")

D=float(num/10)*100

print("percent:%.2f%%" %(D))

四則運(yùn)算

小學(xué)生算術(shù)能力測(cè)試系統(tǒng):

設(shè)計(jì)一個(gè)程序，用來(lái)實(shí)現(xiàn)幫助小學(xué)生進(jìn)行百以?xún)?nèi)的算術(shù)練習(xí)，它具有以下功能：提供10道加、減、乘或除四種基本算術(shù)運(yùn)算的題目；練習(xí)者根據(jù)顯示的題目輸入自己的答案，程序自動(dòng)判斷輸入的答案是否正確并顯示出相應(yīng)的信息。

import random

op = ['+', '-', '*', '/']

count = 0

for i in range(1, 11):

s = random.choice(op)

if s == '+':

num1 = random.randint(0, 101)

num2 = random.randint(0, 101)

result = num1 + num2

print("the %d question: %d + %d" % (i, num1, num2), end='')

result1 = int(input(' = '))

print(result == result1)

if result == result1:

count += 1

elif s == '-':

num1 = random.randint(0, 101)

num2 = random.randint(0, 101)

maxnum = num1 if num1>num2 else num2

minnum = num1 if num1

result = maxnum - minnum

print("the %d question: %d - %d" % (i, num1, num2), end='')

result1 = int(input(' = '))

print(result == result1)

if result == result1:

count += 1

elif s == '*':

num1 = random.randint(0, 11)

num2 = random.randint(0, 11)

result = num1 * num2

print("the %d question: %d * %d" % (i, num1, num2), end=':')

result1 = int(input(' = '))

print(result == result1)

if result == result1:

count += 1

else:

num1 = random.randint(0, 11)

num2 = random.randint(1, 11)

result = int(num1 / num2)

print("the %d question: %d / %d" % (i, num1, num2), end='')

result1 = int(input(' = '))

print(result == result1)

if result == result1:

count += 1

print(count)

percent = (count / 10) * 100

print('right percent = %.2f%%' % (percent))

算法之指定范圍內(nèi)判斷

1). 若一個(gè)正整數(shù)n的所有小于n的因子之和等于n, 則稱(chēng)n為完全數(shù), 如6=1+2+3是完全數(shù)。判斷正整數(shù)n是否為完全數(shù)。

num = int(input("請(qǐng)輸入你所要判斷的數(shù)："))

spectors=[]

sum = 0

for i in range(1,num):

if (num % i) ==0:

spectors.append(i)

sum = sum + i

if sum == num:

print("%s is a perfect number" %(num))

print("%s have factors:" %(num),end=':' )

print(spectors[:])

else:

print('%s is not a perfect number' % (num))

2). 輸入一個(gè)正整數(shù)，判斷其是否為一個(gè)素?cái)?shù)

num2=int(input('please input a number:'))

valse=[]

for i in range(1,num2+1):

if (num2 % i) == 0:

valse.append(i)

if valse==[1,num2]:

print('%s is a prime number' %(num2))

else:

print("%s is not a prime number" %(num2))

3). 輸入一個(gè)正整數(shù)，判斷其是否為一個(gè)回文數(shù)（例1221、12321都是回文數(shù)）；

num3=input('please input a number:')

if num3[:]==num3[::-1]:

print('%s is a palindromic number' %(num3))

else:

print('%s is not a palindromic number' %(num3))

累加和類(lèi)型程序:

1). 求f=1+2+...+9【很簡(jiǎn)單的問(wèn)題】

num = 0

for i in range(10):

num = i +num

print(num)

2). 求f=1-2+3-4+...+9【在（一）的基礎(chǔ)上，學(xué)習(xí)如何一正一負(fù)地累加】

num = 0

for i in range(1,10,2):

num = i +num

for i in range(2,10,2):

num = num -i

print(num)

3). 求f=1-1/2+1/3-1/4+...+1/9【在（二）的基礎(chǔ)上，被加數(shù)成了自然數(shù)的倒數(shù)】

num = 0

for i in range(1,10,2):

num = (1/i) +num

for i in range(2,10,2):

num = num -(1/i)

print(num)

4). 求f=1!-2!+3!-4!+...+9!【在（二）的基礎(chǔ)上，被加數(shù)成了自然數(shù)的階乘】

總結(jié)

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