this code is a disgrace

main.cpp

@@ -2,6 +2,38 @@
 #include <string>
 #include <iostream>
 
+void add_entry(std::vector<std::vector<std::string>>& database, std::string key, std::string value) {
+  database.push_back({key, value});
+}
+
+void remove_entry(std::vector<std::vector<std::string>>& database, std::string key) {
+  int index = 0;
+  for (std::vector<std::string>& entry : database) {
+    index++;
+    if (entry[0] == key) {
+      database.erase(database.begin() + index);
+    }
+  }
+}
+
+void prompt_user(std::vector<std::vector<std::string>>& database) {
+  std::string mode;
+  std::cin >> mode;
+  if (mode == "add") {
+    std::string key;
+    std::string value;
+    std::cin >> key;
+    std::cin >> value;
+    add_entry(database, key, value);
+  } else if (mode == "rem") {
+    std::string key;
+    std::cin >> key;
+    remove_entry(database, key);
+  } else {
+    prompt_user(database);
+  }
+}
+
 int main() {
   std::vector<std::vector<std::string>> database;
 
@@ -10,8 +42,11 @@ int main() {
     { "john", "unwanted_guest"},
     { "laith", "ducc" }
   };
-
-  for (std::vector entry: database) {
-    std::cout << entry[0] << " | " << entry[1] << std::endl;
+  
+  while (true) {
+    for (std::vector entry: database) {
+      std::cout << entry[0] << " | " << entry[1] << std::endl;
+    }
+    prompt_user(database);
   }
 }