updating checkRoster()

Teacher.h

@@ -26,7 +26,7 @@ class Teacher {
         void importProgress();  // Imports roster/progress from a file
         void enrollStudent(string studentIn);  // Enrolls a new student; includes error checking
         void adjustProgress(string studentUserNameIn, int level);   // Changes a students level; includes error checking for student username
-        int checkRoster(string student);    // Checks to see if a student exists with input string
+        int checkRoster(string student);    // Returns a student's position on vector if username student exists in vector; Returns -1 if student does not exist
         void endProgram();  // saves and ends program gracefully
         //  Accessors
         const string getUserName();

classRoster.txt

@@ -14,4 +14,5 @@ levina 4
 Andrew 500
 Sam 2
 Jared 1
+bindan 43
 END_OF_FILE
\ No newline at end of file