python input 数字_python获取从命令行输入数字的方法

#----------------------------------------

# Name: numerical_input.py

# Author: Kevin Harris

# Last Modified: 02/13/04

# Description: This Python script demonstrates

# how to get numerical input

# from the command line

# and use the if-else conditional.

#----------------------------------------

print()

print( "Welcome to the Area calculation program" )

print( "---------------------------------------" )

print()

# Print out the menu:

print( "Please select a shape:" )

print( "1 Rectangle" )

print( "2 Circle" )

print()

# The input function both prompts the user

# for input and fetches it...

shape = int( input( "> " ) )

# Calculate the area...

if shape == 1:

height = int( input("Please enter the height: ") )

width = int( input("Please enter the width: ") )

area = height*width

print( "The area is", area )

else:

radius = int( input("Please enter the radius: ") )

area = 3.14*(radius**2)

print( "The area is", area )

input( 'nnPress Enter to exit...' )

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