why didn't the positive terms get displayed in this asbolute program

Question

Let\'s start with this demo

#include 
using namespace std;

template 
void abs(T number)
{
   if (number < 0)
        numbe         


        

Answer 1

Introduce your own namespace

#include 
#include  // just for testing ADL of 'abs'

namespace ns // introduce namespace
{
  template
  void abs(T number)
  {
    if (number < 0)
    {
      number = -number;
    }

    std::cout << "The absolute value of the number is " << number << std::endl;
  }
}

int main()
{
  int num1 = 1;
  int num2 = 2;
  double num3 = -2.1333;
  float num4 = -4.23f;

  using ns::abs; // use abs from the namespace just introduced above

  abs(num1);
  abs(num2);
  abs(num3);
  abs(num4);

  return 0;
}