centralized performance resources

perf-cpp/scripts/ch15.cc

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+/*
+Question #1
+
+Write a class template named Triad that has 3 private data members with
+independent type template parameters. The class should have a constructor,
+access functions, and a print() member function that is defined outside the
+class.
+
+The following program should compile and run:
+*/
+
+#include <iostream>
+#include <string>
+
+template <typename T1, typename T2, typename T3>
+class Triad {
+ private:
+  T1 t1;
+  T2 t2;
+  T3 t3;
+
+ public:
+  explicit Triad() {
+  }
+  explicit Triad(T1 t1, T2 t2, T3 t3) : t1(t1), t2(t2), t3(t3) {
+  }
+  T1 first() { return t1; }
+  void print() ;
+  ~Triad() {
+  }
+};
+
+template <typename T1, typename T2, typename T3>
+void Triad<T1, T2, T3>::print() {
+  std::cout << '[' << t1 << ", " << t2 << ", " << t3 << "]\n";
+}
+
+int main() {
+  Triad t1{1, 2, 3};
+  t1.print();
+  std::cout << '\n';
+  std::cout << t1.first() << '\n';
+
+  using namespace std::literals::string_literals;
+  const Triad t2{1, 2.3, "Hello"s};
+  t2.print();
+  std::cout << '\n';
+
+  return 0;
+}