feat: Adding switch-case and removing if-else-if (TheAlgorithms#1727)

* Adding switch-case and removing if-else-if

* [feat/fix]: Update

Co-authored-by: David Leal <[email protected]>

Author: uru0120

data_structures/stack_using_linked_list.cpp

@@ -36,19 +36,23 @@ void show() {
 int main() {
     int ch, x;
     do {
+        std::cout << "\n0. Exit or Ctrl+C";
         std::cout << "\n1. Push";
         std::cout << "\n2. Pop";
         std::cout << "\n3. Print";
-        std::cout << "\nEnter Your Choice : ";
+        std::cout << "\nEnter Your Choice: ";
         std::cin >> ch;
-        if (ch == 1) {
-            std::cout << "\nInsert : ";
-            std::cin >> x;
-            push(x);
-        } else if (ch == 2) {
-            pop();
-        } else if (ch == 3) {
-            show();
+        switch(ch){
+        case 0: break;
+        case 1: std::cout << "\nInsert : ";
+                std::cin >> x;
+                push(x);
+                break;
+        case 2: pop();
+                break;
+        case 3: show();
+                break;
+        default: std::cout << "Invalid option!\n"; break;
         }
     } while (ch != 0);