Calculate Average of "Hello, World!".

hello_world.cpp

/*
  Calculate Average of "Hello, World!".

  $ clang++ hello_world.cpp -std=c++11
  $ ./a.out
  Rello, aorld
  82 101 108 108 111 44 32 97 111 114 108 100 22 3 0
 */
#include <string>
#include <cstdio>
#include <array>
#include <vector>
#include <algorithm>
#include <sstream>

std::array<std::string, 3> candidates = {
	std::string("hello, world"),
	std::string("Hello, World!"),
	std::string("Hello, World!\n"),
};

int main()
{
	auto length_comp_func = [](const std::string &a, const std::string &b) {
		return a.length() < b.length();
	};
	auto max_len_elem = std::max_element(candidates.begin(), candidates.end(), length_comp_func);

	std::vector<int> char_buffer(max_len_elem->length() + 1, 0);
	for(auto candidate : candidates) {
		for(int i = 0 ; i < candidate.length() ; ++i) {
			char_buffer[i] += candidate[i];
		}
	}

	std::ostringstream oss;
	for(auto sum : char_buffer) {
		char ch = (char)((float)sum / candidates.size());
		oss << ch;
	}

	auto average_solution = oss.str();
	printf("%s\n", average_solution.data());

	for(auto ch : average_solution) {
		printf("%d ", ch);
	}

	return 0;
}