enivicivokki.cxx

// A simple program that computes the square root of a number
#include <cmath>
#include <iostream>
#include <string>

#include "EnivicivokkiConfig.h"

#ifdef USE_MYMATH
  #include "MathFunctions.h"
#endif

int main(int argc, char* argv[])
{
  if (argc < 2) {
    #ifdef USE_MYMATH
      // report version
      std::cout << argv[0] << " Version " << Enivicivokki_VERSION_MAJOR << "."
                << Enivicivokki_VERSION_MINOR << std::endl;
    #endif
    std::cout << "Usage: " << argv[0] << " number" << std::endl;
    return 1;
  }

  // convert input to double
  const double inputValue = std::stod(argv[1]);

  // calculate square root
  #ifdef USE_MYMATH
    std :: cout << "custom square_root function is used " << std :: endl;
    const double outputValue = mysqrt(inputValue);
  #else
    std :: cout << "default square_root function is used " << std :: endl;
    const double outputValue = sqrt(inputValue);
  #endif

  std::cout << "The square root of " << inputValue << " is " << outputValue
            << std::endl;
  return 0;
}