第十章习题

10-3 访客

filename="program.txt"
with open(filename,'w') as file_object:
	name=input("Please input your name")
	file_object.write(name)

10-5 关于编程的调查

filename="why.txt"
with open(filename,'r+') as file_object:
	while(True):
		reason=input("Why do you like programming? ")
		if(reason):
			file_object.write(reason)
		else:
			break	

10-6 加法运算

print("Give e two numbers,and I will add them")
while(True):
	first=input("First number: ")
	second=input("Second number: ")	
	try:
		answer=int(first)+int(second)
	except ValueError:
		print("You can only print numbers!")
	else:
		print(answer)