test.cpp

// build with: g++ -std=c++98 -Wall -ocheck test.cpp

#include <iostream>
#include <string>
#include <sstream>

int parse_int(const char *x) {
	std::istringstream ss(x);
	int y;
	ss >> y;
	return y;
}

int main(int argc, char **argv) {
	if (argc < 2) {
		return 1;
	}
	const char *one = "one";
	int x = parse_int(argv[1]);
	std::ostringstream ss;
	ss << x;
	std::cout << "Result: " << (x == 1 ? one : ss.str()) << "\n";
	return 0;
}