String Rotate

stringRotate.cpp

#include <vector>
#include <iostream>
#include <string>

std::string simpleRotate(const std::string data) {
	return std::string(data.rbegin(), data.rend());
}

std::string badRotate(std::string data) {
	auto size = data.size();
	for (auto i = size; i > 0; i--) {
		data.insert(size - i, 1, data.back());
		data.pop_back();
	}

	return data;
}

std::string cLikeRotate(std::string data) {
	int i = 0;
	int j = data.size() - 1;
	char tmp;
	while (i < j)
	{
		tmp = data[i];
		data[i] = data[j];
		data[j] = tmp;
		i++;
		j--;
	}
	return data;
}

std::string defaultRotate(std::string data) {
	std::reverse(data.begin(), data.end());
	return data;
}

int main()
{
	std::string data = "Hello, World!";
	std::string correctResult = "!dlroW ,olleH";
	
	auto result1 = simpleRotate(data);
	auto result2 = badRotate(data);
	auto result3 = cLikeRotate(data);
	auto result4 = defaultRotate(data);


	if (result1 != correctResult) {
		std::cout << "Fail! ('simpleRotate' example)" << std::endl;
		return EXIT_FAILURE;
	}

	if (result2 != correctResult) {
		std::cout << "Fail! ('badRotate' example)" << std::endl;
		return EXIT_FAILURE;
	}

	if (result3 != correctResult) {
		std::cout << "Fail! ('cLikeRotate' example)" << std::endl;
		return EXIT_FAILURE;
	}

	if (result4 != correctResult) {
		std::cout << "Fail! ('defaultRotate' example)" << std::endl;
		return EXIT_FAILURE;
	}

	return EXIT_SUCCESS;
}