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  1. Prepare
  2. C++
  3. Introduction
  4. Arrays Introduction
  5. Discussions

Arrays Introduction

  • Ethan13310
     + 7 comments

    We don't want to use C-style array in C++. We use STL containers instead, which have a lot of advantages such as being compatible with STL algorithms, or providing useful member functions such as 'std::vector::size()' (to get the size of the array :D). In this case, we can use 'std::vector', which is a dynamic array. Here's the solution in true C++:

    #include <vector>
#include <iostream>
#include <iterator>

int main()
{
    std::size_t size{}; // Here we use 'std::size_t' instead of 'int'
                        // because an array size cannot be negative
    std::cin >> size;
    std::vector<int> vect(size);
    for (std::size_t i{}; i < size; ++i)
    	std::cin >> vect[i];

    // One of the many advantages to use C++ STL containers:
    // we can use reverse iterators
    for (auto rit = vect.rbegin(); rit != vect.rend(); ++rit)
        std::cout << *rit << ' ';
    std::cout << std::endl;
    return 0;
}