pls explain me this code Count() : value(5) {} what this statement do and use of this statement

Answer 1

Can you share the entier code where it has been used, because in its current, I don't think it is making any sense.

Answer 2

Tushar Jain doesn't the comment above that constructor explains it all ?

Here, you are using an initializer list to initialize member (value) of that class.
Like this whenever you will create an object of type *Count* , value of *value* will be set to 5 for that object

edit :-
If this type of initialization method is new to you then we can use initialization list to initialize constant members,references and base class also which is not possible with conventional method

Answer 3

// C++ program to overload ++ when used as prefix

#include <iostream>
using namespace std;

class Count {
private:
int value;

public:

// Constructor to initialize count to 5
Count() : value(5) {}

// Overload ++ when used as prefix
void operator ++() {
value = value + 1;
}

void display() {
cout << "Count: " << value << endl;
}
};

int main() {
Count count1;

// Call the "void operator ++()" function
++count1;

count1.display();
return 0;
}