clean signal_generator example

Chapter11/signal_generator/main.cpp

@@ -1,83 +1,106 @@
 #include <array>
 #include <cmath>
-#include <numbers>
-
 #include <fstream>
 
-template <typename T, std::size_t N> struct signal : public std::array<T, N> {
+template <typename T, std::size_t N>
+struct signal : public std::array<T, N>
+{
 
   constexpr signal() {}
 
-  constexpr signal(float begin, float end) {
+  constexpr signal(float begin, float end)
+  {
     float step = (end - begin) / (N - 1);
 
-    for (std::size_t i = 0; i < N; i++) {
+    for (std::size_t i = 0; i < N; i++)
+    {
       this->at(i) = begin + i * step;
     }
   }
 
-  constexpr signal(const std::array<T, N> &x, auto fun) {
+  constexpr signal(const std::array<T, N> &x, auto fun)
-    for (std::size_t i = 0; i < N; i++) {
+  {
+    for (std::size_t i = 0; i < N; i++)
+    {
       this->at(i) = fun(x.at(i));
     }
   }
 
-  constexpr signal(const signal &sig, auto fun) {
+  constexpr signal(const signal &sig, auto fun)
-    for (std::size_t i = 0; i < N; i++) {
+  {
+    for (std::size_t i = 0; i < N; i++)
+    {
       this->at(i) = fun(sig.at(i));
     }
   }
 
-  constexpr signal operator+(const T &t) const {
+  constexpr signal operator+(const T &t) const
-    return signal(*this, [&](T elem) { return elem + t; });
+  {
+    return signal(*this, [&](T elem)
+                  { return elem + t; });
   };
 
-  constexpr signal operator-(const T &t) const {
+  constexpr signal operator-(const T &t) const
-    return signal(*this, [&](T elem) { return elem - t; });
+  {
+    return signal(*this, [&](T elem)
+                  { return elem - t; });
   };
 
-  constexpr signal operator*(const T &t) const {
+  constexpr signal operator*(const T &t) const
-    return signal(*this, [&](T elem) { return elem * t; });
+  {
+    return signal(*this, [&](T elem)
+                  { return elem * t; });
   };
 
-  constexpr signal operator/(const T &t) const {
+  constexpr signal operator/(const T &t) const
-    return signal(*this, [&](T elem) { return elem / t; });
+  {
+    return signal(*this, [&](T elem)
+                  { return elem / t; });
   };
 
-  constexpr signal operator+(const signal &sig) const {
+  constexpr signal operator+(const signal &sig) const
+  {
     signal ret;
-    for (std::size_t i = 0; i < N; i++) {
+    for (std::size_t i = 0; i < N; i++)
+    {
       ret.at(i) = this->at(i) + sig.at(i);
     }
     return ret;
   };
 
-  constexpr signal operator-(const signal &sig) const {
+  constexpr signal operator-(const signal &sig) const
+  {
     signal ret;
-    for (std::size_t i = 0; i < N; i++) {
+    for (std::size_t i = 0; i < N; i++)
+    {
       ret.at(i) = this->at(i) - sig.at(i);
     }
     return ret;
   };
 
-  friend constexpr signal operator+(const T& t, const signal& sig) {
+  friend constexpr signal operator+(const T &t, const signal &sig)
+  {
     return sig + t;
   }
 
-  friend constexpr signal operator*(const T& t, const signal& sig) {
+  friend constexpr signal operator*(const T &t, const signal &sig)
+  {
     return sig * t;
   }
 
-  friend constexpr signal operator/(const T& t, const signal& sig) {
+  friend constexpr signal operator/(const T &t, const signal &sig)
+  {
     signal ret;
-    	for (std::size_t i = 0; i < N; i++) {
+    for (std::size_t i = 0; i < N; i++)
+    {
       ret.at(i) = t / sig.at(i);
     }
     return ret;
   }
 };
 
-int main() {
+int main()
+{
 
   constexpr float A = 1.18090254918130e-3;
   constexpr float B = 2.16884014794388e-4;
@@ -89,14 +112,19 @@ int main() {
   constexpr signal<float, c_lut_points> resistance(1e3, 10e3);
 
   constexpr auto temperature_k = 1 / (A +
-		  		      B * signal(resistance, [](float x) {return std::log(x);}) +
+                                      B * signal(resistance, [](float x)
-				      C * signal(resistance, [](float x) {return std::pow(std::log(x), 2);}) +
+                                                 { return std::log(x); }) +
-				      D * signal(resistance, [](float x) {return std::pow(std::log(x), 3);}));
+                                      C * signal(resistance, [](float x)
+                                                 { return std::pow(std::log(x), 2); }) +
+                                      D * signal(resistance, [](float x)
+                                                 { return std::pow(std::log(x), 3); }));
 
   constexpr auto temperature_celsius = temperature_k - 273.15f;
 
   std::ofstream file("out.csv");
-  for(int i = 0; i < c_lut_points; i++) {
+  file << "Resistance[Ohm], Temperature[Celsius]\n";
+  for (int i = 0; i < c_lut_points; i++)
+  {
     file << resistance[i] << ", " << temperature_celsius[i] << "\n";
   }