[SOLVED] How to write the constructor for this c++ code?

[rahul.6sept]

Dear all,

How shall I write the constructor for this code so that it runs?

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Code C++ - [expand]
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#include<iostream>
using namespace std;
class A {
const int id;
public:
   A (int num):id(num)   //constructor
                                                            
void display() {
   cout << id;
   }
};
int main() {
   int val;
   cin >> val;
   A ob (val);
   ob.display();
   return 0;
}

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only constructor can be modified. How can I do this so that input = output

Regards

- - - Updated - - -

I got the solution