const参数

最新推荐文章于 2021-12-21 00:26:48 发布

原创最新推荐文章于 2021-12-21 00:26:48 发布 · 921 阅读

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本文探讨了C++中const参数的使用及其与C语言兼容性的问题。重点介绍了当函数参数被声明为const类型时，编译器如何处理这些参数，并解释了为何即使参数为const，编译器仍将其视为普通整型的情况。

What may be surprising, is that although the parameter is a const inside the function, the compiler otherwise treats the definition of fcn as if we had defined the parameter as a plain int:

     void fcn(const int i) { /* fcn can read but not write to i */ }
     void fcn(int i) { /* ... */ }            // error: redefines fcn(int)

This usage exists to support compatibility with the C language, which makes no distinction between functions taking const or nonconst parameters.