def test_add(self):
startnum=0
rightnum=0 
countnum = int( input("请输入你想做的题数：") )

for startnum in range(0,countnum):

r1=random.randint(0,99)
r2=random.randint(1,99)
r3=random.randint(0,99)
r4=random.randint(1,99)
shu1= random.randint(0,99) #or Fraction(r1, r2) 
shu2= 5
random.randint(0,99) 
#h1=str((shu1))+random.choice(‘-+*/‘)+str(shu2)
#print random.choice(‘-+*/‘)
fuhao=random.choice(‘+‘)
h2=str((shu1))+fuhao+‘(‘+str((shu2))+‘)‘
h3=h2+‘=‘
print h3

h4=str(float(shu1))+fuhao+‘(‘+str(float(shu2))+‘)‘
biaozhun=eval(h4)
answer = raw_input("请输入你的答案：") 

right=float(‘%.3f‘%biaozhun)



if answer.find(‘/‘)!=-1:
#answer2=float(answer)
#print "ddddddddddddd"
reg=r‘(.+)/‘
first=re.findall(reg,answer)

y=str(first)
k=y.replace(‘\‘‘, ‘‘)
x=str(k)
x1=x.replace(‘[‘, ‘‘)
x2=str(x1)
x3=x2.replace(‘]‘, ‘‘)
x4=str(x3)
x5=x4.replace(‘\"‘,‘‘)
ss=str(x5)
#o=eval(ss+"‘")
#print str(ss)
firstnum= float(ss)
#print firstnum
#namelist=re.findall(name)
#print name

reg1=r‘/(.+)‘
last=re.findall(reg1,answer)
y1=str(last)
k1=y1.replace(‘\‘‘, ‘‘)
x1=str(k1)
x2=x1.replace(‘[‘, ‘‘)
x3=str(x2)
x4=x3.replace(‘]‘, ‘‘)
x5=str(x4)
x6=x5.replace(‘\"‘,‘‘)
ss1=str(x6)
#o=eval(ss+"‘")
#print str(ss1)
lastnum= float(ss1)
#print lastnum
#namelist=re.findall(name)
#print name
#firstnum=eval(reg)
#lastnum=eval(reg1)
answer5=firstnum/lastnum
#print ‘rrrrrrrrrrr‘
print answer5
if right==float(‘%.3f‘%answer5):
print "你的答案正确！"
rightnum=rightnum+1
else :
print "你的答案错误,正确的答案为"

print float(‘%.3f‘%biaozhun)
else:
answer2=float(answer)
#print "ssssssssssssss"
if right==float(‘%.3f‘%answer2):
print "你的答案正确！"
rightnum=rightnum+1

else: 
print "你的答案错误,正确的答案为"

print float(‘%.3f‘%biaozhun)

#print h1
print "命中率为"
print rightnum
print countnum