1.控制台输入年龄，根据年龄输出不同的提示(例如:老年人，青壮年，成年人，未成年，儿童)

age = int(input("please input you age:"))
if age >= 60:
    print("you are an Aged.")
elif age >= 25:
    print('you are a young and young people.')
elif age >= 18:
    print('you are an adult.')
elif age >= 12:
    print('you are an under age.')
else:
    print('you are a children')
'''
结果：

'''

2.计算5的阶乘 5!的结果是

sum = 1
for i in range(1,6):
    sum *= i
print(sum)
'''
结果：
120
'''

3.求1+2!+3!+...+20!的和 1.程序分析：此程序只是把累加变成了累乘。

sum1 = 0    #记录总数
for i in range(1,21):
    sum2 = 1    #记录每次阶乘的数
    for j in range(1,i+1):
        sum2 *= j  
    sum1 += sum2
print(sum1)
'''
结果：
2561327494111820313
'''

4.计算 1+1/2!+1/3!+1/4!+...1/20!=?

sum1 = 0 #记录总数
for i in range(1,21):
    sum2 = 1
    for j in range(1,i+1):
        sum2 *= j
    else:
        sum2 = 1/sum2
    sum1 += sum2
print(sum1)
'''
结果:
1.7182818284590455
'''

5.循环输入大于0的数字进行累加，直到输入的数字为0，就结束循环，并最后输出累加的结果。

sum = 0
while True:
    num = int(input('please input a number(0 is over):'))
    if num > 0:
        sum += num
    elif num==0:
        break
print(sum)
'''
结果：
please input a number(0 is over):1
please input a number(0 is over):2
please input a number(0 is over):3
please input a number(0 is over):4
please input a number(0 is over):5
please input a number(0 is over):0
15
'''

6.求s=a+aa+aaa+aaaa+aa...a的值，其中a是一个数字。例如2+22+222+2222+22222(此时共有5个数相加)，几个数相加有键盘控制。 1.程序分析：关键是计算出每一项的值
。

sum = 0
s = input("Please input numbers and add them together and add a few digits, separated by spaces.") 
num = int(s.split(' ')[0])
length = int(s.split(' ')[1])
for i in range(1,length+1):
    sum += int(str(num)*i)
print(sum)
'''
结果：
Please input numbers and add them together and add a few digits, separated by spaces.2 5
24690

'''

7.输入三个整数x,y,z，请把这三个数由小到大输出。

//方法一
num = []
for i in range(3):
    n = input('please input a number:')
    num.append(n)
num.sort()
for i in num:
    print(i,end='')
    print(" ",end='')
print()
#方法二
num = []
for i in range(3):
    n = input('please input a number:')
    num.append(n)
i = 0
while i < len(num)
  m = num[i]
  j = i+1
  while j < len(num):
    if m <= num[j]:
      m = num[j]
      num.insert(i,num.pop(j))
      j -= 1
    j += 1
  i += 1
print(num)

#方法三
num = []
for i in range(3):
    n = input('please input a number:')
    num.append(n)
for i in range(0,len(num)):
  for j in range(i+1,len(num)):
    if num[i] <= num[j]:
      t = num[i]
      num[i] = num[j]
      num[j] = t
print(num)
#方法四：最笨的方法
x = input('please input a number:')
y = input('please input a number:')
x = input('please input a number:')
if x>y and x>z and y>z:
    print('%d %d %d'%(x,y,z))
elif x>y and x>z and z>y:
    print('%d %d %d'%(x,z,y))
elif y>x and y>z and x>z:
    print('%d %d %d'%(y,x,z))
elif y>x and y>z and z>x:
    print('%d %d %d'%(y,z,x))
elif z>x and z>y and x>y:
    print('%d %d %d'%(z,x,y))
else:
    print('%d %d %d'%(z,y,x))
'''
结果：
please input a number:9
please input a number:4
please input a number:2
2 4 9

'''

8.控制台输出三角形

a.根据n的值的不同，输出相应的形状
n = 5时             n = 4
*****               ****
****                ***
***                 **
**                  *
*

b.根据n的值的不同，输出相应的形状(n为奇数)
n = 5               n = 7
  *                    *
 ***                  ***
*****                *****
                    *******

#a.根据n的值的不同，输出响应的形状
num = int(input('please input a number:'))
while num > 0:
    print('*'*num)
    num -= 1
'''
结果：
please input a number:5
*****
****
***
**
*

'''
#根据n的值的不同，输出相应的形状(n为奇数)
n = int(input('please input an odd number:'))
i = 1
mid_n = n//2
while i <= n:
    print(" "*mid_n,end='')
    print('*'*i)
    i += 2
    mid_n -= 1
'''
结果:
please input an odd number:9
    *
   ***
  *****
 *******
*********
'''

9.输出9*9口诀。 1.程序分析：分行与列考虑，共9行9列，i控制行，j控制列。

图片.png

for i in range(1,10):
    for j in range(1,i+1):
        print('%d*%d=%d'%(i,j,i*j),end='')
    print()
'''
结果：
1*1=1 
1*2=2 2*2=4 
1*3=3 2*3=6 3*3=9 
1*4=4 2*4=8 3*4=12 4*4=16 
1*5=5 2*5=10 3*5=15 4*5=20 5*5=25 
1*6=6 2*6=12 3*6=18 4*6=24 5*6=30 6*6=36 
1*7=7 2*7=14 3*7=21 4*7=28 5*7=35 6*7=42 7*7=49 
1*8=8 2*8=16 3*8=24 4*8=32 5*8=40 6*8=48 7*8=56 8*8=64 
1*9=9 2*9=18 3*9=27 4*9=36 5*9=45 6*9=54 7*9=63 8*9=72 9*9=81 
'''

10.这是经典的"百马百担"问题，有一百匹马，驮一百担货，大马驮3担，中马驮2担，两只小马驮1担，问有大，中，小马各几匹？

big_horse = 0
midd_horse = 0
small_horse = 0
for i in range(0,100//3+1):
    big_horse = i
    for j in range(0,100//2+1):
        midd_horse = j
        for k in range(0,101,2):
            small_horse = k
            if big_horse*3+midd_horse*2+small_horse/2==100 and big_horse+midd_horse+small_horse==100:
                print('big_horse:%d\nmidd_horse:%d\nsmall_horse:%d\n'%(
                    big_horse,midd_horse,small_horse
                    ))
                break
'''
结果：
big_horse:2
midd_horse:30
small_horse:68

big_horse:5
midd_horse:25
small_horse:70

big_horse:8
midd_horse:20
small_horse:72

big_horse:11
midd_horse:15
small_horse:74

big_horse:14
midd_horse:10
small_horse:76

big_horse:17
midd_horse:5
small_horse:78

big_horse:20
midd_horse:0
small_horse:80
'''

11.我国古代数学家张邱建在《算经》中出了一道“百钱买百鸡”的问题，题意是这样的： 5文钱可以买一只公鸡，3文钱可以买一只母鸡，1文钱可以买3只雏鸡。现在用100文钱买100只鸡，那么各有公鸡、母鸡、雏鸡多少只？请编写程序实现。

cock = 0
hen = 0
chick = 0
for i in range(0,100//5+1):
    cock = i
    for j in range(0,100//3+1):
        hen = j
        for k in range(0,101,3):
            chick = k
            if cock*5+hen*3+chick/3==100 and cock+hen+chick==100:
                print('cock:%d\nhen:%d\nchick:%d\n'%(cock,hen,chick))
                break
'''
结果：
cock:0
hen:25
chick:75

cock:4
hen:18
chick:78

cock:8
hen:11
chick:81

cock:12
hen:4
chick:84
'''

12.小明单位发了100元的购物卡，小明到超市买三类洗化用品，洗发水（15元），香皂（2元），牙刷（5元）。要把100元整好花掉，可以有哪些购买结合？

shampoo = 0
soap = 0
toothbrush = 0
for i in range(0,100//15+1):
    shampoo = i
    for j in range(0,100//2+1):
        soap = j
        for k in range(0,100//5+1):
            toothbrush = k
            if shampoo*15+soap*2+toothbrush*5==100:
                print('shampoo:%d\nsoap:%d\ntoothbrush:%d\n'%(shampoo,soap,toothbrush))
'''
结果：
shampoo:0
soap:0
toothbrush:20

shampoo:0
soap:5
toothbrush:18

shampoo:0
soap:10
toothbrush:16

shampoo:0
soap:15
toothbrush:14

shampoo:0
soap:20
toothbrush:12

shampoo:0
soap:25
toothbrush:10

shampoo:0
soap:30
toothbrush:8

shampoo:0
soap:35
toothbrush:6

shampoo:0
soap:40
toothbrush:4

shampoo:0
soap:45
toothbrush:2

shampoo:0
soap:50
toothbrush:0

shampoo:1
soap:0
toothbrush:17

shampoo:1
soap:5
toothbrush:15

shampoo:1
soap:10
toothbrush:13

shampoo:1
soap:15
toothbrush:11

shampoo:1
soap:20
toothbrush:9

shampoo:1
soap:25
toothbrush:7

shampoo:1
soap:30
toothbrush:5

shampoo:1
soap:35
toothbrush:3

shampoo:1
soap:40
toothbrush:1

shampoo:2
soap:0
toothbrush:14

shampoo:2
soap:5
toothbrush:12

shampoo:2
soap:10
toothbrush:10

shampoo:2
soap:15
toothbrush:8

shampoo:2
soap:20
toothbrush:6

shampoo:2
soap:25
toothbrush:4

shampoo:2
soap:30
toothbrush:2

shampoo:2
soap:35
toothbrush:0

shampoo:3
soap:0
toothbrush:11

shampoo:3
soap:5
toothbrush:9

shampoo:3
soap:10
toothbrush:7

shampoo:3
soap:15
toothbrush:5

shampoo:3
soap:20
toothbrush:3

shampoo:3
soap:25
toothbrush:1

shampoo:4
soap:0
toothbrush:8

shampoo:4
soap:5
toothbrush:6

shampoo:4
soap:10
toothbrush:4

shampoo:4
soap:15
toothbrush:2

shampoo:4
soap:20
toothbrush:0

shampoo:5
soap:0
toothbrush:5

shampoo:5
soap:5
toothbrush:3

shampoo:5
soap:10
toothbrush:1

shampoo:6
soap:0
toothbrush:2

shampoo:6
soap:5
toothbrush:0
'''