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const in c++
Alive Angelfish
on Jun 17, 2020
// various versions of const are explained below
#include <iostream>
class Entity {
private:
int m_X, m_Y;
mutable int var; // can be modified inside const menthods
int* m_x, *m_y;// * use to create pointer in one line
public:
int GetX() const // cant modify class variables
{
//m_X = 4;//error private member can't be modified inside const method
var = 5; // was set mutable
return m_X;
}
int Get_X()// will modify class
{
return m_X;
}
const int* const getX() const // returning a pointer that cannot be modified & context of pointer cannot be modified
{
//m_x = 4;
return m_x;
}
void PrintEntity(const Entity& e) {
std::cout << e.GetX() << std::endl;
}
};
int main() {
Entity e;
const int MAX_AGE = 90;
// MAX_AGE =100; error const var is stored in read only section in memory and we can't write to that memory
// int const* a = new int; is same as const int* a = new int ;////but you can't change the context of pointer but can reassign it to a pointer something else
int * const a = new int; //can change the context of pointer but can't reassign it to a pointer something else
*a = 2;
a = &MAX_AGE;// error can't change it to ptr something else
std::cout << *a << std::endl;
a =(int*) &MAX_AGE;
std::cout << *a << std::endl;
}const c++
BreadCode
on Apr 08, 2021
//Syntax: const Class_Name Object_name;
const int MAXN = 1e5 + 5;
const long long mod = (long long)1e9 + 7;c++ constant
Phil the ice cream man
on Nov 10, 2020
#define LENGTH 10
#define WIDTH 5
#define NEWLINE '\n'All those coders who are working on the C++ based application and are stuck on const in c++ can get a collection of related answers to their query. Programmers need to enter their query on const in c++ related to C++ code and they'll get their ambiguities clear immediately. On our webpage, there are tutorials about const in c++ for the programmers working on C++ code while coding their module. Coders are also allowed to rectify already present answers of const in c++ while working on the C++ language code. Developers can add up suggestions if they deem fit any other answer relating to "const in c++". Visit this developer's friendly online web community, CodeProZone, and get your queries like const in c++ resolved professionally and stay updated to the latest C++ updates.
