sc hasnextint

是你说的无限读入(即一直执行while循环),而是程序阻塞了,在等待你的输入。 再说说程序的问题吧,只判断了一次hasNextInt()就用了两次nextInt()这样不好,那直接 a = sc.nextInt(); b = sc; 如果不确定个数的话.nextInt()。

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