Question

How to accessing out of range elements and throw exception in C++

Answer 1

#include <iostream>
#include <array>

using std::cout;
using std::endl;
using std::array;

template <typename T>
inline void print(const T &data)
{
	for (const auto &element : data) {
		cout << element << ' ';
	}
	cout << endl;
}

int main()
{
	array<int, 5> arr = { 45, 32, 54, 21, 9 };

	try
	{
		int n  = arr.at(7);
	}
	catch (const std::out_of_range& exp)
	{
		std::cerr << exp.what() << endl;
	}

	return 0;
}


/*
run:

invalid array<T, N> subscript

*/

 

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