Question

1) Within the main function, the call to the constructor by defense of a class called MyClass is made by creating the firstClass object as follows.

A) MyClass firstClass;

B) MyClass firstClass (8);

C) MyClass () firstClass;

D) MyClass firstClass ();

Answer 1

A) MyClass firstClass;

// Screenshot of the code

// Sample output

// Code to copy

#include<iostream>

using namespace std;

class MyClass{  
   public:
       MyClass(){      
           cout<<"Constructor ";
       }
};
int main(){
   MyClass firstClass;  
   return 0;
}

B) MyClass firstClass (8);

// Screenshot of the code

// Sample output

// Code to copy

#include<iostream>
using namespace std;
class MyClass{
   private:
       int n;
   public:
       MyClass(int n){
           n=n;
           cout<<"Constructor "<<n;
       }
};
int main(){
   MyClass firstClass (8);  
   return 0;
}

D) MyClass firstClass ();

// Screenshot of the code & output

// Code to copy

#include<iostream>
using namespace std;
class MyClass{
   public:
       MyClass(){
           cout<<"Constructor";
       }
};
int main(){
   MyClass firstClass ();  
   return 0;
}