C++ | Templates | Question 4

Output of following program?

#include <iostream> 
using namespace std; 
  
template <class T> 
class Test 
{ 
private: 
    T val; 
public: 
    static int count; 
    Test()  {   count++;   } 
}; 
  
template<class T> 
int Test<T>::count = 0; 
  
int main() 
{ 
    Test<int> a; 
    Test<int> b; 
    Test<double> c; 
    cout << Test<int>::count   << endl; 
    cout << Test<double>::count << endl; 
    return 0; 
} 

(A)

0
0

(B)

1
1

(C)

2
1

(D)

1
0

Answer: (C)

Explanation: There are two classes created by the template: Test and Test.

Since count is a static member, every class has its own copy of it. Also, count gets incremented in constructor.

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