Merge pull request #46 from STELLA-LYE/Update-UML

Update uml

docs/diagrams/BetterModelClassDiagram.puml

@@ -1,4 +1,5 @@
 @startuml
+!pragma layout smetana
 !include style.puml
 skinparam arrowThickness 1.1
 skinparam arrowColor MODEL_COLOR
@@ -17,7 +18,7 @@ Person -up-> "*" Group
 Person *--> Name
 Person *--> Phone
 Person *--> Email
-Person *--> Address
+Person *--> Major
 Person *--> Year
 Person *--> Telegram
 @enduml

docs/diagrams/DeleteActivityDiagram.puml

@@ -0,0 +1,18 @@
+@startuml
+start
+:Student TA executes add command;
+
+if () then ([command is in invalid format])
+    :Show invalid command format as error message;
+
+else ([else])
+    if () then ([Student already exists in TutorsContactsPro])
+    : Show duplicate group error message;
+    else([else])
+    : Add student to the contact list;
+    : Displays student list in the GUI;
+    endif
+
+endif
+stop
+@enduml

docs/diagrams/ModelClassDiagram.puml

@@ -1,4 +1,5 @@
 @startuml
+!pragma layout smetana
 !include style.puml
 skinparam arrowThickness 1.1
 skinparam arrowColor MODEL_COLOR
@@ -42,7 +43,7 @@ Person *--> Phone
 Person *--> Email
 Person *--> Year
 Person *--> Telegram
-Person *--> Address
+Person *--> Major
 Person *--> "*" Group
 
 Person -[hidden]up--> I