while True: num1 = input('请输入第一个数字(按q退出):') if num1 == 'q': break num2 = input('请输入第二个数字(按q退出):') if num2 == 'q': break try: answer = int(num1) + int(num2) except ValueError: msg = '请输入数字!' print(msg) else: print(answer)
10-6 10-7
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