1.對體重標准的判斷
#coding:utf-8
height=170
weight=65
#weight=height-105
if weight<height-105:
print '您偏瘦！注意補充營養'
elif weight>height-105:
print '您偏胖！注意鍛煉身體'
else:
print '完美'
print '您的健康體重應該是：%d' %weight
2 對lily和Tom年齡的比較
#coding:utf-8
#駝峰命名
age_of_lily=10
AgeOfTom=12
if age_of_lily<AgeOfTom: #語句中的‘：’不能省略
print 'lily is old' #print語句前面有空格,用Tab鍵打空
elif age_of_lily>AgeOfTom:
print 'tom is old'
elif age_of_lily==AgeOfTom:
print 'they are twins'
else:
print 'error!'
3 對公司員工實發工資的計算
這里有輸出print '實發工資：%.2f' %ssal
%.2f是保留小數點后兩位
#coding:utf-8
sal=8000#所發工資
baox=1100#保險
saltax=sal-baox-3500 #應納稅所得額
if saltax<1500:#注意冒號
tax=(sal-baox-3500)*0.03 #繳費
ssal=sal-baox-tax #真實工資
print '實發工資：%.2f' %ssal
elif 1500<saltax<4500:
tax=(sal-baox-3500)*0.1-105
ssal=sal-baox-tax
print '應繳費：%d'%tax
print '實發工資：%.2d'%ssal
elif 4500<saltax<9000:
tax=(sal-baox-3500)*0.2
ssal=sal-baox-tax
print '應繳費：%d'%tax
print '實發工資：%d'%ssal
else:
print '不在范圍內，請重新選擇！'
