violation of const variable using a pointer c++ -


Why do I have permission to change a single console value without errors? 

  void foo (long * A) {* A = 50; } Int _tmain (int argc, _TCHAR * argv []) {const tall a = 7; Const long * b = & amp; A; Fu ((* long *) b); // now the value of one 50}

You / Em>.

When you wrote that the C-style cast, you have disabled the check. If you wrote it: 

  foo (static_cast & lt; tall *> (b));

or just 

  foo (b);

So your program does not compile.

To allow you to perform specialist magic, you can still write: 

  foo (const_cast & lt; long *> (b));

But still it is the responsibility of your to ensure that you do not use it for evil, as evil in your example.


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