Assignment 8

Problem 1 (4 points)

Write a Python program that asks the user for a number and store it in the variable n. Then, the main process creates two child processes (both must be children of the main process). One child exits successfully if n>10 and unsuccessfully otherwise, whereas the other child exits successfully if n>20 and unsuccessfully otherwise. The main process must print how many of its children ended successfully. The children must be allowed to run in parallel.

编写一个Python程序，要求用户输入一个数字并将其存储在变量n中。然后，主进程创建两个子进程（两个子进程都必须是主进程的子进程）。一个子进程如果n>10则成功退出，否则不成功退出；另一个子进程如果n>20则成功退出，否则不成功退出。主进程必须打印出有多少个子进程成功结束。子进程必须允许并行运行。

Use the following template:

from os import waitpid,fork
n=float(input('Give me a number: '))
# write your code here

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