Python 数值计算
print "Welcome to run"print "Please input num"
print "1 stand for 矩形"
print "2 stand for 圆"
print "3 stand for 正方形"
s=int(input("Please input U num:"))
if s == 1:
print "input 长度:"
print "input 宽度:"
a=int(input("长度:"))
b=int(input("宽度:"))
x=a*b
print x
elif s == 3:
print "input 正方形边长"
v=int(input("边长:"))
z=v*v
print v
elif s == 2:
print "input 值:"
c=int(input("半径:"))
d=c*c*3.14
print d
else:
print "OH no! Please input 1-3"
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