作业2

def tixing_mianji(a,b,c):

return (a+b)*c/2

a = float(input('请输入梯形上边长'))

b = float(input('请输入梯形下边长'))

c = float(input('请输入梯形高'))

mianji = tixing_mianji(a,b,c)

print('梯形面积为:',mianji)

def print_year(year):

if (year%4 == 0):

print('%d是闰年'%year)

elif year%400 == 0:

print('%d是闰年'%year)

else:

print('%d不是闰年'%year)

if name == 'main':

year = int(input('请输入年份'))

print_year(year)