书本练习p42-44

字符串拼接
str1 = input("请输入一个人的名字:")
str2 = input("请输入一个国家的名字:")
print("世界这么大,{}想去{}看看.".format(str1, str2))
整数序列求和
n = input("请输入整数N:")
sum = 0
for i in range(int(n))
sum += i + 1
print("1到N之和:", sum)
阶乘序列求和
sum, tmp = 0, 1
for i in range(1, 11):
tmp = i
sum += tmp
print("运算结果是：{}".format(sum))
九乘九乘法口诀
for i in range(1,10):
for j in range(1,i+1):
print("{}{}={:2}".format(j,i,ij),end='')
print('')
健康食谱输出
diet = ['西红柿','花椰菜','黄瓜','牛柳','虾仁']
for x in range(0,5):
for y in range(0,5):
if not(x == y):
print("{}炒{}".format(diet[x],diet[y]))
幸运数字计算
import random
name = input("请输入名字:")
lucky = 1
random.seed(7)
for c in name:
lucky += ord(c)random.randint(1,77)
print("幸运数字是:{}".format(lucky%777))
五角星绘制
from turtle import *
fillcolor("red")
begin_fill()
while True:
forward(200)
right(144)
if abs(pos()) < 1:
break
end_fill
done()
太阳花绘制
from turtle import *
color('red','yellow')
begin_fill()
while True:
forward(200)
right(144)
if abs(pos()) < 1:
break
end_fill()
done()