global objects and functions
introduction to a debugger¡@
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Create directories "linkedlist" and "transpose" and "task" under ~/comp151/lab03Download the zip files to the corresponding folder
unzip the file using command "unzip"
e.g., unzip LinkedList.zip
and a sequence of requested accesses :Sydney, Rome, Rome, Rome, Rome, HongKong, Moscow, ... ...
The cost of accessing city is the number of cities that have to be traversed to get to that city. Given a sequence of requested accesses, our objective is to minimize the cost of accessing the cities in the sequence in the given order.
While processing the accesses we are allowed to modify the list as follows: after accessing a city in the list, we can move it anywhere we want that is closer to the front of the list.
--After accessing city 'A', move city 'A' one unit forward towards the front of the list
--e.g. after accessing Sydney, the list becomes
--compile LinkedList using the command "gmake"
--run the program
--"access.txt" contains a sequence of requested accesses
--notice how "extern" in main.cpp
is used to access the global objects and function.
--notice how cities are inserted into the list
--List::Insert is now public so as to insert node at run time
--List::Delete added to delete node at run time
--compile the program
--when you run the program, it hangs.
Let's figure out what happened using the debugger 'ddd'
-- notice the '-g' parameter in g++
-- what is memory leak?
-- what is dangling pointer?
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