Solved: 01 - Basic IO

modules/01_fundamentals/src/basic_io.cpp

@@ -5,24 +5,36 @@
 
 namespace fundamentals {
 
-auto join_words(const std::vector<std::string>& words, char separator) -> std::string {
-    // TODO: Join words with separator, no trailing separator.
-    (void)words;
-    (void)separator;
-    return {};
+auto join_words(const std::vector<std::string>& words, const char separator) -> std::string {
+    std::ostringstream oss;
+    size_t i = 0;
+    for (const auto& word : words) {
+        i++;
+        oss << word;
+        if (i < words.size()) {
+            oss << separator;
+        }
+    }
+    return oss.str();
 }
 
 auto parse_integers(const std::string& csv) -> std::vector<int> {
-    // TODO: Parse comma-separated integers (e.g. "1,2,3").
-    (void)csv;
-    return {};
+    std::vector<int> numbers;
+    std::istringstream iss(csv);
+    int n;
+    char c;
+    do {
+        iss >> n;
+        numbers.push_back(n);
+        iss >> c;
+    } while (!iss.eof());
+    return numbers;
 }
 
-auto format_score(const std::string& player, int score) -> std::string {
-    // TODO: Return "<player> scored <score> points".
-    (void)player;
-    (void)score;
-    return {};
+auto format_score(const std::string& player, const int score) -> std::string {
+    std::ostringstream oss;
+    oss << player << " scored " << score << " points";
+    return oss.str();
 }
 
 }  // namespace fundamentals