"pointers to pointers in cpp" Code Answer's
You're definitely familiar with the best coding language C++ that developers use to develop their projects and they get all their queries like "pointers to pointers in cpp" answered properly. Developers are finding an appropriate answer about pointers to pointers in cpp related to the C++ coding language. By visiting this online portal developers get answers concerning C++ codes question like pointers to pointers in cpp. Enter your desired code related query in the search bar and get every piece of information about C++ code related question on pointers to pointers in cpp.
pointers in cpp
#include <iostream>
using std::cout;
int main() {
/*
Some things to keep in mind:
-you shouldn't circumvent the type system if you are creating raw ptrs
and don't need to "type pun" or cast (don't use void ptrs)
-ptr types only reference memory (which are integers), not actual data, thus
they should not be treated as data types
char* is just 1 byte of mem, int* is just 4 bytes of mem, etc
- '*' means that you are creating a pointer which "points" to the mem address
of a variable
- '&', in this case, means "get the mem address of this variable"
*/
void* ptr; // a pointer that doesn't reference a certain size of memory
int* int_ptr; // a pointer that points to data with
// only 4 bytes of memory (on stack)
int a = 5; // allocates 4 bytes of mem and stores "5" there (as a primitive)
ptr = &a; // can only access the memory address of 'a' (not the data there)
int b = 45;
int_ptr = &b; // can access both memory address and data of 'b'
cout << ptr << "\n"; // prints mem address of 'a'
/*cout << *ptr << "\n"; <- this will error out; a void ptr cannot be
derefrenced */
cout << *(int*)ptr << "\n"; // type punning to get around void ptr (extra work)
cout << int_ptr << "\n"; // mem address of b
cout << *int_ptr << "\n"; // data stored at b
/* -- OUTPUTS -- */
/*
some memory address (arbitrary) which contains 05 00 00 00 as its data
5
some memory address (arbitrary) which contains 2D 00 00 00 as its data
45
*/
return 0; // you only need this if "main" isnt the linker entry point
// you also don't care
// ur also probably wondering why I didn't using namespace std... cherno
}
pointers to pointers in cpp
#include <iostream>
using namespace std;
int main () {
int var;
int *ptr;
int **pptr;
var = 3000;
// take the address of var
ptr = &var;
// take the address of ptr using address of operator &
pptr = &ptr;
// take the value using pptr
cout << "Value of var :" << var << endl;
cout << "Value available at *ptr :" << *ptr << endl;
cout << "Value available at **pptr :" << **pptr << endl;
return 0;
}
Source: www.tutorialspoint.com
All those coders who are working on the C++ based application and are stuck on pointers to pointers in cpp can get a collection of related answers to their query. Programmers need to enter their query on pointers to pointers in cpp related to C++ code and they'll get their ambiguities clear immediately. On our webpage, there are tutorials about pointers to pointers in cpp for the programmers working on C++ code while coding their module. Coders are also allowed to rectify already present answers of pointers to pointers in cpp while working on the C++ language code. Developers can add up suggestions if they deem fit any other answer relating to "pointers to pointers in cpp". Visit this developer's friendly online web community, CodeProZone, and get your queries like pointers to pointers in cpp resolved professionally and stay updated to the latest C++ updates.