Where does a program return its output?

Which is an instantiation of the basic_string class template?

How many parameters are present in the mismatch function in non-sequence modifying algorithms?

Algorithms that take the same amount of time to compute regardless of the input size are known as ____.

 to use the function tolower(), which of the following header file should include

Where can Kruskal's algorithm be used?

What is the purpose of adapters in the C++ Standard Template Library (STL)?

 What is a comment in c++?

#include <iostream>
using namespace std;

namespace foo
{
 int value() { return 5; }
}

namespace bar
{
 const double pi = 3.1416;
 double value() { return 2*pi; }
}

int main () {
 cout << foo::value() << '\n';
 cout << bar::value() << '\n';
 cout << bar::pi << '\n';
 return 0;
}