C++ debug macros

C++-debug-code.cc

int PRINT_TIMES = 0;
#define PRINT(x) PRINT_TIMES++; if (PRINT_TIMES <= 40) {std::cout << #x << " = " << x << "\n";}
#define PRINT_VECTOR(x) PRINT_TIMES++; if (PRINT_TIMES <= 40){std::cout << #x << " = "; print_vector(x);}

template <typename T>
void print_vector(T &v) {
  std::cout << "{";
  bool first_value = true;
  for (auto i = v.begin(); i != v.end(); ++i) {
    if (first_value) {
      first_value = false;
    } else {
      std::cout << ", ";
    }
    std::cout << *i;
  }
  std::cout << "}\n";
}