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    3. error: no match for ‘operator＜＜’ (operand types are ‘std::ostream {aka std::basic

    error: no match for ‘operator＜＜’ (operand types are ‘std::ostream {aka std::basic

    科技2022-07-17  87

    注意输出流中不应该包含返回值为void的函数。

    https://stackoverflow.com/questions/53224411/error-no-match-for-operator-operand-types-are-stdostream-aka-stdbasi

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