68 lines
1.8 KiB
C++
68 lines
1.8 KiB
C++
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#include <iostream>
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#include <vector>
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#include <fstream>
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#include <regex>
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std::string readTextFromFile(const std::string& fileName) {
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std::vector<std::string> lines;
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std::ifstream file(fileName);
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if (!file) { // Überprüft, ob die Datei geöffnet werden konnte
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std::cerr << "Fehler: Datei konnte nicht geöffnet werden: " << fileName << std::endl;
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return "";
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}
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std::string result;
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std::string s;
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while(getline(file, s)) {
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result += s;
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}
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return result;
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}
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std::vector<std::string> determineValidMuls(std::string& content) {
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std::vector<std::string> validMuls;
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std::regex regex(R"(mul\(\d{1,3},\d{1,3}\))");
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auto begin = std::sregex_iterator(content.begin(), content.end(), regex);
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auto end = std::sregex_iterator();
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for(auto it = begin; it != end; ++it) {
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validMuls.push_back(it->str());
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}
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return validMuls;
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}
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int calcMultOfMultOp(const std::string& multOp) {
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std::regex regex("\\d{1,3}");
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auto begin = std::sregex_iterator(multOp.begin(), multOp.end(), regex);
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auto end = std::sregex_iterator();
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int multResult = 1;
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for(auto it = begin; it != end; ++it) {
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multResult *= std::stoi(it->str());
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}
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return multResult;
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}
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int calcMultSum(std::vector<std::string>& validMuls) {
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int sum = 0;
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for(const auto& mul : validMuls) {
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sum += calcMultOfMultOp(mul);
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}
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return sum;
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}
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int main() {
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std::string content = readTextFromFile("../input.txt");
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std::cout << content << std::endl;
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std::vector<std::string> validMuls = determineValidMuls(content);
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for(const auto& mul : validMuls) {
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std::cout << mul << std::endl;
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}
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int result = calcMultSum(validMuls);
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std::cout << "The correct Mult Result is: " << result << std::endl;
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return 0;
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}
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