The so-called range-based for loop appeared in the C++ 11 standard, together with the auto keyword gives us a very powerful and idiomatic way of looping over things. Let’s start with a simple array. #include <iostream> int main() { int odd_data[] = {1, 3, 5, 7, 9}; for (auto x : odd_data) std::cout << x << “\n”; } Here, the for loop goes over all the elements of the odd_data array, and you … Continue reading “A range-for loop in C++”
Tag: cpp
constexpr in C++ 11 and C++ 14
In the previous post, we were talking about the constexpr keyword in modern C++. It was added to the C++ 11 standard, but in C++ 14, it got a very nice addition. In particular, you can do more in constexpr functions now. Consider the following program that wants to pre-compute a factorial of 5. #include <iostream> … Continue reading “constexpr in C++ 11 and C++ 14”
constexpr in C++
The constexpr keyword is a relatively new addition to C++. You need to use the C++11 standard in order to compile the following programs: g++ -std=c++11 test.cpp Let’s examine what the keyword is about. There’s no difficulty to split it into words to get the meaning: constant expression. In practice, constant expression means that the … Continue reading “constexpr in C++”