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book: discriminative modification to the nature of override and overload (#265)
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@@ -971,7 +971,7 @@ C++11 introduces the two keywords `override` and `final` to prevent this from ha
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### override
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When overriding a virtual function, introducing the `override` keyword will explicitly tell the compiler to overload, and the compiler will check if the base function has such a virtual function, otherwise it will not compile:
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When overriding a virtual function, introducing the `override` keyword will explicitly tell the compiler to overload, and the compiler will check if the base function has such a virtual function with consistent function signature, otherwise it will not compile:
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```cpp
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struct Base {
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@@ -880,7 +880,7 @@ C++11 引入了 `override` 和 `final` 这两个关键字来防止上述情形
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#### override
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当重载虚函数时,引入 `override` 关键字将显式的告知编译器进行重载,编译器将检查基函数是否存在这样的虚函数,否则将无法通过编译:
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当重载虚函数时,引入 `override` 关键字将显式的告知编译器进行重载,编译器将检查基函数是否存在这样的其函数签名一致的虚函数,否则将无法通过编译:
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```cpp
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struct Base {
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