CPP_2_1

+#include <iostream>
+#include <string>
+
+using std::cin;
+using std::string;
+
+namespace FiniteAutomata {
+
+    const char keySymbols[] = "'\"\\/*\n";
+    const int keySymbolsCount = 6;
+    const int DEFAULT_EVENT = 6;
+    const int transitionTable[9][7] = {
+        {3, 4, 0, 1, 0, 0, 0},
+        {0, 0, 0, 5, 6, 0, 0},
+        {6, 6, 6, 0, 2, 6, 6},
+        {0, 3, 7, 3, 3, 3, 3},
+        {4, 0, 8, 4, 4, 4, 4},
+        {5, 5, 5, 5, 5, 0, 5},
+        {6, 6, 6, 6, 2, 6, 6},
+        {3, 3, 3, 3, 3, 3, 3},
+        {4, 4, 4, 4, 4, 4, 4}
+    };
+
+    string makeTransition(int & state, char previousCharacter, char currentCharacter) {
+        string result;
+
+        int eventNumber = DEFAULT_EVENT;
+        for (size_t i = 0; i < keySymbolsCount; ++i) {
+            if (currentCharacter == keySymbols[i]) {
+                eventNumber = i;
+                break;
+            }
+        }
+
+        int newState = transitionTable[state][eventNumber];
+
+        switch (state) {
+        case 0:
+            if (newState != 1) {
+                result += currentCharacter;
+            }
+            break;
+        case 1:
+            if (newState != 5 && newState != 6) {
+                result += previousCharacter;
+                result += currentCharacter;
+            }
+            break;
+        case 3:
+        case 4:
+        case 7:
+        case 8:
+            result += currentCharacter;
+            break;
+        case 5:
+            if (newState == 0) {
+                result += currentCharacter;
+            }
+            break;
+        }
+        state = newState;
+
+        return result;
+    }
+
+    string removeComments(const string & source) {
+        string result;
+
+        int state = 0;
+        for (size_t index = 0; index < source.length(); ++index) {
+            char currentCharacter = source[index];
+            char previousCharacter = 0;
+            if (index > 0) {
+                previousCharacter = source[index - 1];
+            }
+            result += makeTransition(state, previousCharacter, currentCharacter);
+        }
+
+        return result;
+    }
+
+}
+
+string sourceInput() {
+    string result;
+    int nextCharacter = cin.get();
+    while (!cin.eof()) {
+        result += (char)nextCharacter;
+        nextCharacter = cin.get();
+    }
+    return result;
+}
+
+
+
+
+
+int main() {
+    std::ios_base::sync_with_stdio(false);
+    string source = sourceInput();
+    std::cout << FiniteAutomata::removeComments(source);
+    return 0;
+}