Every implementation of the C++ Standard Library like one included to Embarcadero RAD Studio C++ compilers provides two ways for (pseudo-)random numbers generation: old-fashioned facilities from <cstdlib> and modern facilities provided by <random>.
Facilities from <cstdlib>
There are two very simple functions provided by the C random library: std::srand() and std::rand().
In addition to Helpers for Generic C++ Code Iterating Over Sequences the C++17 Standard Library provides the following helpers for writing generic code:
#include <iterator> // new helpers of C++17 are defined here
template<class Container>
void…
The iterator library that is part of the C++ Standard Library provides the following helpers for writing generic code:
#include <iterator> // helpers are defined here
template<class Container>
void foo(Container& c)
{
// Generic way to obtain (constant)…
Since C++11 there are elegant way to access each element of a containers (or, more generally, sequences) – so called range-for-statement. The syntaxes are follow:
template<class Container>
void foo(Container& container)
{
for (auto element : container); // (1)
for (const auto element : container); // (2)
for (auto& element : container); // (3)
for…
Learn About Basic Windows Components In C++ Development (QuickLook Part 2)
December 10, 2020
TComboBox
ComboBox is used to select list of texts (i.e. Categories). Gets the item that is currently selected in the combo box. Selectedreturns the selected item in the combo box as…
C++ is a strong and faster programming language, this feature really important on dynamic operations running less than in milliseconds of intervals. C++ is one of the best to analyze video camera images, it is good to analyze video image operations by using very modern…
In this article we will add some quick methods to show how to use basic components in C++ Builder. Most of component properties and methods are same in VCL and FMX projects. If you are a beginner we highly recommend you to watch this Introduction To C++ Windows Development With C++Builder video to understand C++ Builder / RAD Studio IDE interface and some basic mechanisms. This video will help…
Let’s slightly modify the example from The Move Iterator Adapter in C++ post:
#include <algorithm>
#include <list>
#include <string>
#include <vector>
/// @warning BUG! PLEASE, DON'T USE!
auto deep_copy_to_list(const…
The dereference prefix operator * being applied to iterator returns the lvalue reference to the element pointed by the iterator. Therefore, algorithms such as std::copy or std::transform calls copying constructors of processed elements, for example:
#include…
By using bidirectional iterator or random access iterator (see Iterator Categories in C++) it’s possible to traverse the sequence in backward direction by using operator -- or by using the special adapter template class std::reverse_iterator. But why to bother with reverse iterators if the operator -- is available for iterators with bidirectional traversing capabilities? The answer is…
