42 lines
1.0 KiB
C++
42 lines
1.0 KiB
C++
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#include <iostream>
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#include <fstream>
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#include <regex>
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#include <algorithm>
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#define STRINGTONUM(test, number) \
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if(str == test) { \
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digit = number; \
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} else \
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int main() {
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std::ifstream input("./input");
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std::regex numberRegex("(zero|one|two|three|four|five|six|seven|eight|nine|[0-9])");
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size_t val = 0;
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for(std::string line; std::getline(input, line);) {
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std::vector<uint8_t> digits;
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std::for_each(std::sregex_iterator(line.begin(), line.end(), numberRegex), std::sregex_iterator(), [&digits](const std::smatch &match){
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std::string str = match.str();
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uint8_t digit;
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if(str.size() > 1) { // not a direct digit
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STRINGTONUM("zero", 0)
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STRINGTONUM("one", 1)
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STRINGTONUM("two", 2)
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STRINGTONUM("three", 3)
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STRINGTONUM("four", 4)
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STRINGTONUM("five", 5)
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STRINGTONUM("six", 6)
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STRINGTONUM("seven", 7)
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STRINGTONUM("eight", 8)
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STRINGTONUM("nine", 9) {}
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} else {
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digit = str[0] - '0';
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}
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digits.push_back(digit);
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});
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val += digits.front()*10 + digits.back();
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}
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std::cout << val << std::endl;
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}
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