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  1.     #include <iostream>
  2.     #include <complex>
  3.     #include <type_traits>
  4.  
  5.     using namespace std;
  6.  
  7.     double get_real(double n) { return n; }
  8.  
  9.     double get_real(const std::complex<double>& n) { return n.real(); }
  10.  
  11.     template <typename T>
  12.     std::complex<double> f(T n)
  13.     {
  14.         if (std::is_same<T, std::complex<double>>::value)
  15.             return n * std::complex<double>{1, -1} + get_real(n);
  16.         else
  17.             return -n;
  18.     }
  19.  
  20.  
  21.     int main()
  22.     {
  23.     	std::cout << f(std::complex<double>{10, 10}) << '\n';
  24.     	std::cout << f(10.0) << '\n';
  25.     }
  26.  
Success #stdin #stdout 0s 3472KB
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stdin
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Standard input is empty
stdout
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(30,0)
(-10,0)
https://ideone.com/amjewP
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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