Maps

- [Narrator] The map class provides a sorted set…of key-value pairs, like an associative arary.…Here I have a working copy of map.cpp…from chapter two of the exercise files.…And you see we have our normal stuff up the top here.…We can print the elements of a map.…That calls print_pair, because each of the elements…in a map is a pair, and so print_pair…prints the first and second elements of the pair.…We have some print a message things here,…and then we get on to main.…And you'll notice here on line 31,…I initialize a map object, and this is a map of strings,…and so you notice I have string for the two different values…for the key and the value pair,…and so I'm initializing it with an initializer list,…and each of these elements in the initializer list…is a pair, and so I guess I have initializer lists…within the initializer list, and that works just great.…

And you'll notice there's four elements here,…George, Ellen, Ruth, and Spike,…and so when I build and run this,…I'll scroll up here to the top,…and you see that the size of the object is four…