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  1. #include <cstdint>
  2. #include <limits>
  3.  
  4. template <typename T>
  5. constexpr double normalize (T value) {
  6.   return value < 0
  7.     ? -static_cast<double>(value) / std::numeric_limits<T>::min()
  8.     :  static_cast<double>(value) / std::numeric_limits<T>::max()
  9.     ;
  10. }
  11.  
  12. int main () {
  13.   // Test cases evaluated at compile time.
  14.   static_assert(normalize(int16_t(32767)) == 1, "");
  15.   static_assert(normalize(int16_t(0)) == 0, "");
  16.   static_assert(normalize(int16_t(-32768)) == -1, "");
  17.   static_assert(normalize(int16_t(-16384)) == -0.5, "");
  18.   static_assert(normalize(uint16_t(65535)) == 1, "");
  19.   static_assert(normalize(uint16_t(0)) == 0, "");
  20. }
Success #stdin #stdout 0s 3456KB
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https://ideone.com/4kIJtU
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
secret

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