Exercise 7, spring 2006
-----------------------

Get familiar with standard library's(STL) containers. Examine the following containers in 
particular: vector, list, string and map - what they are and how to use them.

A few basic things to find out:
	-Vector/list: Adding and removing elements, accessing elements.
	-String: using with cout/cin, behavior of operators =, +, == etc.
	-Map: Adding/finding elements


As an example:

1.Create a program that asks strings from user and adds them to
a list - loops until user enters for example "stop".
Then it creates a new string which is the 'sum' of strings in the list - so
if the list would have strings "a", "b" and "c", then the 'sum string' was "abc".

2. Create a simple 'examresultlist' with map. The 'key' could be the name of the participant,
and the 'value' the grade. Test it with main program.