To use purify, you must create an instrumented executable file. For example, if your program consists of two files named main.C and List.C, you could created an instrumented executable named a.out by typing:
purify g++ -g main.C List.C
(As usual, use the -o flag to produce an executable named something other than a.out.)
Once you have produced an instrumented executable, just run it in the usual way (by typing its name, and, if your program is designed to use them, the appropriate command-line arguments).
Don't be surprised if the instrumented executable runs much more slowly than the non-instrumented version; it may also be much larger than the non-instrumented version.
And Run the executable automatically purify window will get opened along with the your executable.
Visit Following link for example
http://pages.cs.wisc.edu/~cs368-1/handouts/purify.html#example
