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C++錯誤之一 :invalid initialization of non-const reference of type ‘xxx&’ from an rvalue of type ‘xxx’
時間 2021-01-04
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1、看代碼 2、編譯結果 3、分析和解決 就拿f(a + b)來說,a+b的值會存在一個臨時變量中,當把這個臨時變量傳給f時,由於f的聲明中,參數是int&,不是常量引用,因爲c++編譯器的一個關於語義的限制。如果一個參數是以非const引用傳入,c++編譯器就有理由認爲程序員會在函數中修改這個值,並且這個被修改的引用在函數返回後要發揮作用。但如果你把一個臨時變量當作非const引
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C++錯誤之一 :invalid initialization of non-const reference of type ‘xxx&’ from an rvalue of type ‘xxx’
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報錯 error: invalid initialization of non-const reference of type ‘XXX &’ from an rvalue of type‘XXX‘
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Cannot create class of type 'XXX'. Type 'XXX' not found.
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