refactor(ex3.cpp): Implemented HashTable

exercises/ex1.cpp

@@ -3,6 +3,35 @@
 #include <iostream>
 using namespace std;
 
+void printDay(int week){
+  switch(week){
+    case 1:
+      cout<<"Monday"<<endl;
+      break;
+    case 2:
+      cout<<"Tuesday"<<endl;
+      break;
+    case 3:
+      cout<<"Wednesday"<<endl;
+      break;
+    case 4:
+      cout<<"Thursday"<<endl;
+      break;
+    case 5:
+      cout<<"Friday"<<endl;
+      break;
+    case 6:
+      cout<<"Saturday"<<endl;
+      break;
+    case 7:
+      cout<<"Sunday"<<endl;
+      break;
+    default:
+      cout<<"Error: Inser a number between 1-7"<<endl;
+      break;
+  }
+}
+
 int main()
 {
   int week;
@@ -11,38 +40,7 @@ int main()
   cout << "Enter week number(1-7): " << endl;
   cin >> week;
 
-  if (week == 1)
-  {
-    cout << "Monday" << endl;
-  }
-  else if (week == 2)
-  {
-    cout << "Tuesday" << endl;
-  }
-  else if (week == 3)
-  {
-    cout << "Wednesday" << endl;
-  }
-  else if (week == 4)
-  {
-    cout << "Thursday" << endl;
-  }
-  else if (week == 5)
-  {
-    cout << "Friday" << endl;
-  }
-  else if (week == 6)
-  {
-    cout << "Saturday" << endl;
-  }
-  else if (week == 7)
-  {
-    cout << "Sunday" << endl;
-  }
-  else
-  {
-    cout << "Invalid input! Please enter week number between 1-7." << endl;
-  }
+  printDay(week);
 
   return 0;
-}
+}

exercises/ex2.cpp

@@ -7,45 +7,19 @@
 #include <iostream>
 using namespace std;
 
+
 int main()
 {
   int week;
-
+  string arr[7]={"Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"};
   cout << "Enter week number(1-7): " << endl;
   cin >> week;
-
-  if (week == 1)
-  {
-    cout << "Monday" << endl;
-  }
-  else if (week == 2)
-  {
-    cout << "Tuesday" << endl;
-  }
-  else if (week == 3)
-  {
-    cout << "Wednesday" << endl;
-  }
-  else if (week == 4)
-  {
-    cout << "Thursday" << endl;
-  }
-  else if (week == 5)
-  {
-    cout << "Friday" << endl;
-  }
-  else if (week == 6)
-  {
-    cout << "Saturday" << endl;
-  }
-  else if (week == 7)
-  {
-    cout << "Sunday" << endl;
-  }
-  else
-  {
-    cout << "Invalid input! Please enter week number between 1-7." << endl;
+  if(week<1){
+    cout << "Error: Insert number between 1-7" <<endl;
+    return -1;
   }
+  cout << arr[week-1] <<endl;
+
 
   return 0;
-}
+}

exercises/ex3.cpp

@@ -1,43 +1,33 @@
 /* Could you still use a switch case here? May you can use a map. */
 
 #include <iostream>
+#include <unordered_map>
 using namespace std;
 
+void initFamousPeople(unordered_map<string,string>& famousPeople){
+  famousPeople["BarackObama"]="44th president of the United States";
+  famousPeople["SandroPertini"]="Former President of the Italian Republic";
+  famousPeople["NelsonMandela"]="Former President of South Africa";
+  famousPeople["MahatmaGandhi"]="Bapu";
+  famousPeople["DonaldKnuth"]="Creator of LaTeX";
+  famousPeople["DennisRitchie"]="Creator of C";
+}
+
+template<typename T, typename U> bool contains(unordered_map<T,U>& famousPeople, T key){
+  return (famousPeople.count(key)==0 ? false : true);
+}
+
 int main()
 {
   string textInput;
+  unordered_map<string,string> famousPeople;
+  initFamousPeople(famousPeople);
 
   cout << "Enter a famous name+surname, ex. BarackObama " << endl;
   cin >> textInput;
 
-  if (textInput == "BarackObama")
-  {
-    cout << "44th president of the United States" << endl;
-  }
-  else if (textInput == "SandroPertini")
-  {
-    cout << "Former President of the Italian Republic" << endl;
-  }
-  else if (textInput == "NelsonMandela")
-  {
-    cout << "Former President of South Africa" << endl;
-  }
-  else if (textInput == "MahatmaGandhi")
-  {
-    cout << "Bapu" << endl;
-  }
-  else if (textInput == "DonaldKnuth")
-  {
-    cout << "Creator of LaTeX" << endl;
-  }
-  else if (textInput == "DennisRitchie")
-  {
-    cout << "Creator of C" << endl;
-  }
-  else
-  {
-    cout << "Invalid input! Please enter a good name!" << endl;
-  }
+  if(contains(famousPeople, textInput))
+    cout<<famousPeople[textInput]<<endl;
 
   return 0;
-}
+}