What will be the output of the following C++ program? 

#include <iostream>
using namespace std;
class Demo
{
public:
    Demo() { cout << "Hello"; }
};
int main()
{
    Demo d;
    return 0;
}

Options

  • A. Nothing
  • B. Demo
  • C. Hello
  • D. More than one of the above
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

C. Hello

Detailed Explanation

Correct Answer: Option C

Explanation:
Demo() is a constructor because its name matches the class name and it has no return type. The constructor is called automatically when object d is created, so the program prints Hello.
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TRE4 C and C++ Quiz practice set 3

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