cars=100

print('there are ',cars,'cars available.')

##练习5 更多变量打印

my_name='zxx'

my_age=22

my_height=162

my_weight='secret'

my_eyes='black'

my_teeth='white'

my_hair='black'

print("let's talk about %s."%my_name)

print("she's %d inches tall."%my_height)

print("she's weight is %s."%my_weight)

print("actully that's not too heavy.")

print("she's got %s eyes and %s hair."%(my_eyes,my_hair))

print("her teeth are usually %s depending on the coffe."%my_teeth)

print("if i add %d ,%d, i get %d."%(my_age,my_height,my_age+my_height))

print('%.2f'%2.6345) #保留两位小数（%后加.)

#%c    转换成字符（ASCII 码值，或者长度为一的字符串）

#%r    优先用repr()函数进行字符串转换（Python2.0新增）

#%s    优先用str()函数进行字符串转换

#%d / %i     转成有符号十进制数

#%u    转成无符号十进制数(阿拉伯数字1，2,3,4.....10)

#%o    转成无符号八进制数(0,1,2,...7;逢八进一）

#%x / %X    (Unsigned)转成无符号十六进制数（x / X 代表转换后的十六进制字符的大小写）

#%e / %E    转成科学计数法（e / E控制输出e / E）

#%f / %F    转成浮点数（小数部分自然截断）

#%g / %G    %e和%f / %E和%F 的简写

#%%    输出%

##练习6 字符串和文本

x="there are %d types of people."%10

binary='binary'

do_not="don't"

y="those who kown %s and those who %s."%(binary,do_not)

print(x)

print(y)

print("i said :%r."%x)

#将%r改成$s,x字符串输出的时候没有单引号，即%r输出有单引号

print("i also said :%s."%y)

hilarious=False

joke_evaluation="isn't that joke so funny?!%r"

print(joke_evaluation %hilarious)

w="this is the left side of..."

e="a string with a right side"

print(w+e) #字符串拼接

#字符串拼接其他方法：

print('%s%s'%(w,e))

##练习7 更多打印

print("marry had a little lamb.")

print("its fleece was white as %s."%'snow')

print("and everyone that mary went.")

print("."*10)  #打印十个.

end1="C"

end2="h"

end3="e"

end4="e"

end5="s"

end6="e"

end7="B"

end8="u"

end9="r"

end10="g"

end11="e"

end12="r"

print (end1+end2+end3+end4+end5+end6,end=" ")

print(end7+end8+end9+end10+end11+end12)  #在一行内打印，利用end参数end=""(无缝连接）end=" "(字符串间有空格）

##练习8 ：打印，打印

formatter="%r %r %r %r"

print(formatter %(1,2,3,4))

print(formatter %("one","two","three","four")

print(formatter %("i had this thing.",

                    "that you could type up right.",

                    "but it didn't sing",

                    "so i said goodnight.")

                    )

#调试不成功的代码69-75

##练习9 打印，打印，打印

days="mon tue wed thu fri sat sun"

months="jan\nfeb\nmar\napr\nmay\njun\njul\naug" #\n换行标识符

print("here are the days:",days)

print("here are the months:",months)

print("""

        there's something going on here.

        with the three double-quotes.

        we'll ba able to type as much as we like.

        even 4 lines if we want,or 5,or 6.

    """)

#"""三引号：打印多行字符串