第一章课后作业

r = float(input("请输入圆的半径:"))
area = 3.1415r r
print(area)

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))

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)

for i in range (1,10):
for j in range (1,i+1):
print("{}*{}={:2} ".format(j,i,i+1),end='')
print('')

sum,tmp =0,1
for i in range(1,11):
tmp += i
sum += tmp
print("运算结果是:{}".format(sum))

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]))

mport 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))

from turtle import*
fillcolor("red")
begin_fill()
while True:
forward(200)
right(144)
if abs(pos())< 1:
break
end_fill()

from turtle import*
color('red','yellow')
begin_fill()
while True:
forward(200)
left(170)
if abs(pos()) < 1:
break
end_fill()
done()