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C++ Fundamentals for Professionals

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Understand the importance of bounds checking in C++ arrays by comparing direct access and the at() function. Discover how at() throws exceptions for out-of-range access, enhancing safety when working with sequential containers. This lesson lays the groundwork for exploring vectors next.

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Solution #

C++ 17
#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 << " " ; }
  arr[1]=1000;
  arr[5]=5;
  std::cout << std::endl;
  for (auto a: arr){ std::cout << a << " " ; }
  arr.at(0) = 10000;
  arr.at(5) = 5;
  std::cout << std::endl;
}

Explanation

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