implement the function isValidPhoneNumber() in the getNewEmployeeCredentials() function.

src/createEmployeeAccount.c

@@ -179,13 +179,19 @@ void getNewEmployeeCredentials()
 
             printf("\n\nplease enter your Phone number\n");
             scanf(" %[^\n]s",data->phoneNumber);
-
+            if(isValidPhoneNumber(data->phoneNumber))
+            {
                 createNewEmployee(employeeId,employeePassword) ?
                     printf("\n\n Account created successfully !\n\n") :
                     printf("\n\n Could not create the Account please contact an employee of clearance 1 !\n\n");
                 storeEmployeeData(data->firstName,data->lastName,data->address,data->phoneNumber);
             }
             else
+            {
+                printf("\nInvalid phone number!\n");
+            }
+        }
+        else
         {
             printf("the given name contains unwanted characters(spaces, symbols,numbers)");
         }