C++ Fizzbuzz Implementation

fizzbuzz.cpp

#include <iostream>
#include <map>
#include <string>

/* FizzBuzz prints numbers 1 through n but replaces numbers which are multiples of 3 with "Fizz",
*  numbers which are multiples of 5 with "Buzz", and numbers which are multiples of both with "FizzBuzz"
*/
void FizzBuzz(int n)
{
	// Map of integers to replacement strings for executing FizzBuzz
	// This map can be extended from the typical FizzBuzz implementation with other <integer, string> pairs
	static const std::map<int, std::string> sk_FizzBuzzMap = {{3, "Fizz"}, {5, "Buzz"}};

	for (int i = 1; i <= n; ++i)
	{
		std::string ans;
		for (auto& replacement : sk_FizzBuzzMap)
		{
			ans += (i % replacement.first == 0) ? replacement.second : "";
		}
		ans += (ans.empty()) ? std::to_string(i) : "";
		
		std::cout << ans << std::endl;
	}
}

int main(int argc, char *argv[])
{
	const int defaultFizzBuzzN = 100;
	
	// check argument list for number to FizzBuzz
	if (argc < 2)
	{
		FizzBuzz(defaultFizzBuzzN);
	}
	else if (argc == 2)
	{
		try
		{
			int n = std::stoi(argv[1]);
			if (n <= 0)
			{
				std::cerr << "N must be a positive integer greater than 0.";
				return 1;
			}
			FizzBuzz(n);
		}
		catch (...)
		{
			std::cerr << "N must be a positive integer greater than 0.";
			return 1;
		}
		
	}
	else
	{
		std::cerr << "Only 1 argument expected: the number to FizzBuzz";
		return 1;
	}
	
	return 0;
}