#include #include #include #include #include #include // https://www.codewars.com/kata/525c7c5ab6aecef16e0001a5/ // The instructions are simple... Given an English representation of a number in string, convert it to integer. // e.g. one hundred and twenty-two -> 122 // Compilation may fail on SL due to the use of regex (known issue with C++ Code Playground) // Solution only tested within range 1 - 99999999, may fail beyond. const std::map dict ={ {"one",1},{"two",2},{"three",3},{"four",4}, {"five",5},{"six",6},{"seven",7},{"eight",8}, {"nine",9},{"ten",10},{"eleven", 11},{"twelve",12}, {"thirteen",13},{"fourteen",14},{"fifteen",15},{"sixteen",16}, {"seventeen",17},{"eighteen",18},{"nineteen",19},{"twenty",20}, {"thirty",30},{"forty",40},{"fifty",50},{"sixty",60},{"seventy",70}, {"eighty",80},{"ninety",90},{"hundred",100},{"thousand",1000},{"million",1000000} }; long parse_int(std::string value) { auto tokenize = [](const std::string& str) { std::vector res; size_t current, next = -1; do { current = next + 1; next = str.find_first_of(' ', current); res.push_back(str.substr(current, next-current)); } while (next != std::string::npos); return res; }; std::vector res; int temp = 0; auto token_list = tokenize(std::regex_replace(value,std::regex("-| and ")," ")); for (std::string i : token_list) { if (i != "hundred" && i != "thousand" && i != "million") { temp += dict.find(i)->second; } else { temp *= dict.find(i)->second; if (i == "thousand" || i == "million") { res.push_back(temp); temp = 0; } } } res.push_back(temp); return std::accumulate(res.begin(), res.end(), 0); } int main() { std::cout << parse_int("six") << std::endl; std::cout << parse_int("sixty-six") << std::endl; std::cout << parse_int("six hundred and sixty-six") << std::endl; std::cout << parse_int("six thousand six hundred and sixty-six") << std::endl; std::cout << parse_int("sixty-six thousand six hundred and sixty-six") << std::endl; std::cout << parse_int("six hundred and sixty-six thousand six hundred and sixty-six") << std::endl; std::cout << parse_int("six million six hundred and sixty-six thousand six hundred and sixty-six") << std::endl; }

Kata Challenge (parseInt() reloaded)