摘要: def inputcheck(n): while True: try: return float(n) except: print("输入错误,输入值只能为数字:") n = input() def add(x, y): return x + y def subtract(x, y): return 阅读全文
posted @ 2020-04-24 16:50 zzuCharles 阅读(256) 评论(0) 推荐(0) 编辑