Implemented a prototype for selecting time format

src/main.cpp

@@ -6,7 +6,7 @@ public:
     MyFormatter() : Formatter() {}
     std::string make_usage([[maybe_unused]] const CLI::App *app, [[maybe_unused]] std::string name) const override {
         return "USAGE: " + name + " [OPTIONS]";
-    };
+    }
 };
 
 int main(int argc, char **argv) {
@@ -14,15 +14,32 @@ int main(int argc, char **argv) {
     auto fmt = std::make_shared<MyFormatter>();
     app.formatter(fmt);
 
-    int p = 0;
-    app.add_option("-p", p, "Parameter");
+    char timeFormat {};
+
+    app.add_option("-f, --format", timeFormat, "Dictates which format to output as")
+    ->multi_option_policy (CLI::MultiOptionPolicy::Throw)
+    ->default_val('f');
 
     CLI11_PARSE(app, argc, argv);
 
-    [[maybe_unused]] std::time_t result = std::time(nullptr);
-    std::tm time = *std::localtime(&result);
-    std::cout << std::asctime(&time);
+    try {
+        if (timeFormat != 'F' && timeFormat != 'f' &&
+            timeFormat != 'D' && timeFormat != 'd' &&
+            timeFormat != 'T' && timeFormat != 't' &&
+            timeFormat != 'R') {
+            throw std::invalid_argument("Invalid format selected");
+            }
+    } catch (const std::invalid_argument& e) {
+        std::cerr << "Error: " << e.what() << std::endl;
+        std::exit(EXIT_FAILURE);
+    }
 
-    std::cout << "Parameter value: " << p << std::endl;
+    std::time_t result = std::time(nullptr);
+    std::tm currentTime = *std::localtime(&result);
+    std::tm resultTime = currentTime;
+
+    std::cout << std::asctime(&resultTime);
+
+    std::cout << "Parameter value: " << timeFormat << std::endl;
     return 0;
 }