Solution for 2015 Day 5 part 1 (C++)

Signed-off-by: Sebastian Lukas <[email protected]>

2015/Day5/day5.cpp

@@ -0,0 +1,78 @@
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <algorithm>
+#include <vector>
+
+const std::vector<std::string> disallowed{"ab", "cd", "pq", "xy"};
+const std::vector<char> vowels{'a', 'e', 'i', 'o', 'u'};
+
+bool found_three_vowels(std::string line) {
+    int found_vowels = 0;
+    std::string::size_type start_pos = 0;
+    for (char vowel : vowels) {
+        while (std::string::npos != (start_pos = line.find(vowel, start_pos))) {
+            ++start_pos;
+            found_vowels++;
+        }
+        start_pos = 0;
+    }
+
+    if (found_vowels >= 3) {
+        return true;
+    } else {
+        return false;
+    }
+}
+
+bool found_naughty_word(std::string line) {
+    for (std::string dis : disallowed) {
+        if (std::string::npos != line.find(dis)) {
+            return true;
+        }
+    }
+    return false;
+}
+
+bool found_letter_double(std::string line) {
+    for (std::string::size_type i = 1; i < line.size(); i++) {
+        if (line[i-1] == line[i]) {
+            return true;
+        }
+    }
+    return false;
+
+}
+
+void part1() {
+    std::ifstream input {"input.txt"};
+    std::string line;
+    int nice_strings = 0;
+
+    if (input.good()) {
+        while (input >> line) {
+
+            if (found_letter_double(line) == false) {
+                // std::cout << "Double letter not found!\n";
+                continue;
+            }
+
+            if (found_three_vowels(line) == false) {
+                // std::cout << "Vowels not found!";
+                continue;
+            }
+
+            if (found_naughty_word(line)) {
+                continue;
+            }
+            nice_strings++;
+        }
+    }
+    std::cout << "Nice Strings: " << nice_strings << "\n";
+}
+
+int main() {
+
+    part1();
+
+}