Const and const_cast of C ++

Const and const_cast of C ++

 

Today, I visited the Q & A community,

In C ++, someone asked about const_cast,

Exactly in < >.

I flipped through the books and searched the internet,

I found it quite interesting ....

 

The subject asks how to remove a const array of the double type set to const during running and then change the array content.

 

> First, make it clear that,

For const_cast

This is just a const for pointers and references. For variables, problems may occur.

For example, read the following code:

 

Const int a = 789; int & B = const_cast
 
  
(A); int * c = const_cast
  
   
(& A); cout <run:
   
 
   

   
 
   
Nice to play ~.~
   
 
   
 
   
 
   
> Then, for this question,
   
The array belongs to the pointer category because it is an array,
   
I tried to write,
   
Found,
   
Through an intermediate variable, you can change the content of the original const:
   
 
   
Const double arr [3] = {1.2, 3.3, 4.5}; int I; for (I = 0; I <3; ++ I) cout <(arr [0]); for (I = 0; I <3; ++ I) cout <The result is OK.
 
 
OK, that's it,
Interesting stuff ~.~