Will the iPhone's memory leak check how the investigation?

Where I have failed to find a way to exit the ios program, I may be white, I only know that press the home button, are hidden programs. Double-click the home button, then press the chart below, the jitter when closed, it is forced to close it.
I am a beginner, I wrote the program does not know whether the memory leak, or when pressing the home button to exit the program and no hidden tips.
May I ask, what do memory leak detection program?
First thanked.
Reply:
Some memory leaks can easily be found by reading the code, while others would difficult point, and this is the reason why you need Instruments. Instruments have a "Leaks" tool, it will tell you exactly what a memory leak, so that you can locate and fix leaks.

http://www.cnblogs.com/chiniao/archive/2010 / 09/25/1834912.html