ex3.py

#coding:utf-8
#################
# 习题3:数字和数字计算
#################

print "I will count my chickens:"# 我要数数我的鸡 0.0

print u"Hens， 母鸡",25+30 / 6
print u"Roosters, 公鸡",100-25*3%4

print u"Now I will count the eggs:（现在我要数鸡蛋了:）"

print 3 + 2 + 1 - 5 + 4 % 2 - 1 / 4 + 6

print "Is it true that 3 + 2 < 5 - 7?"

print  3 + 2 < 5 - 7

print "What is  3 + 2?",3 + 2
print "What is  5 - 7?",5 - 7

print "Oh, that's why it's False."

# 我写不下去了！！太白痴了

print "How about some more."

print "Is it greater?",5 > -2
print "Is it greater or equal?",5 >= -2
print "Is it less or equal?",5 <= -2

# 笔记
# 1.写注释的时候最好像这样写
# 利用快捷键ctrl+d 多复制几行
# 2.注意:
# 输出后面加计算要记得加 ‘，’
print "20 / 3 =",20 / 3
# 注意浮点数的概念，应该写成：
print u"朋友应该这样写："
print "20.0 / 3 =",20.0 / 3
# 3.除法计算结果小？
print u"瞧一瞧，看一看啦！"
print "7 / 6 < 7.0 / 6.0",7 / 6 < 7.0 / 6.0