使用指针和strcpy获取值的C ++类 [英] C++ classes getting value using pointers and strcpy

问题描述

我想了解C ++。任何人都可以解释这段代码是什么，我知道它是一些类型的setter和getter在Java，但我不知道。

I am trying to understand C++. Can anybody explain what this code does exactly, I understood that it is some type of setter and getter in Java but I am not sure.

Comm::Comm(const char* id)
{
strcpy(this->id, id);
}


char* Comm::getId()
{
   return id;
}

推荐答案

它会烧伤孩子的眼睛。

类 char * 或 char [N] 。没有setter本身，但 Comm 的构造函数尝试将其输入复制到该成员变量。 getId 函数是此成员变量的获取器。

The assumption here is that the class Comm has a member variable of type char* or char[N]. There is no "setter" per se, but Comm's constructor attempts to copy its input to that member variable. The getId function is a getter for this member variable.

根据代码的其余部分，完全缺陷由于缺乏内存分配，缺乏内存分配，和缺乏复制语义。在最佳中，成员是一个数组，然后在 strcpy 调用中缺少范围检查是一个严重的安全风险。

Depending on the rest of the code, this could be totally flawed due to lack of memory allocation, lack of memory de-allocation, and lack of copy semantics. At best the member is an array and then the lack of range checking in the strcpy call is a serious security risk.

类将使用 std :: string 更好地重新设计。

The class would be much better redesigned with the use of std::string.

我会不鼓励你学习这段程式码片段。

I would not encourage you to learn from this code snippet.

href =http://stackoverflow.com/q/388242/560648>一本好书。

Instead, learn from a good book.

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