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Embedded Programming with Modern C++

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Understand how to manage resources efficiently by using std::array in Modern C++. Learn to modify array elements safely using both bracket and at access methods, and recognize how out-of-range access triggers exceptions. This lesson prepares you for advanced memory management with smart pointers in future lessons.

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Solution

C++
#include <array>
#include <iostream>
int main(){
    
  std::cout << std::endl;
  std::array<int, 4> arr= {1, 2, 3, 4};
  for ( auto a: arr){ std::cout << a << " " ; }
  std::cout << std::endl;
  arr[0]=1000;
  arr[2]=5;
  for ( auto a: arr){ std::cout << a << " " ; }
  std::cout << std::endl;
  arr.at(0)= '2';
  arr.at(2)= 'c';
  for ( auto a: arr){ std::cout << a << " " ; }
  std::cout << std::endl;
  arr.at(100)= 'l';
}

Explanation

  • In line 8, we have initialized an std::array<int>.

  • In lines 13 and 14, we ...