Constant pointer and pointer constant

Constant pointer and pointer constant

# Include
 
  
Using namespace std; int main () {int a = 5, B = 10, d = 20; int * const c = & a; * c = a; cout <
  
   
Output: (No screenshots will be taken in Ubuntu)
   
Try it by yourself. You can see that the same address is output, and there are 5, 10;
   
The most important thing to remember is that cosnt modifies the thing before it, that is, int *, and int * is a pointer, so it is understood that the pointer is modified as a constant (so the output address of the program remains unchanged, but its memory value can be changed)
   
Assign values when defining them. Otherwise, an error occurs,
   
C = & B; no, because c is a constant !!!

   
# Include
    
     
Using namespace std; int main () {int a = 5, B = 10, d = 20; int const * c = & a; c = & d; cout <
     
      
It's easy to understand the program to modify the previous content of const.

      
The output result is different addresses and values.
      
Because it is not a constant pointer, the address of c can be changed at will;

      
But cannot * c = 50; because the value in c memory cannot be changed;
      
Although I know the literal meaning of constant pointers and pointer constants, I forget it in a few days. Anyway, knowing how to use it is the most important thing.
      
The most important thing to remember is that cosnt modifies the content in front of it. This is what I saw in C ++ templates.
      
And cosnt int a = 10;
      
Int const a = 10;
      
In C ++ templates books, we recommend that you use the following;

      
Int const * cosnt c = & a; is modified twice and cannot be modified;