Examples:

• Program with Leaks
  • This program will freeze
  
  
• Fixed Program
  • This program has No memory leaks
  
  
• What's the diff between "definitely lost", "possibly lost", "still reachable"?
  • Link to Vagrind FAQ
  • "definitely lost" means your program is leaking memory -- fix it!
  • "possibly lost" means your program is probably leaking memory, unless you're doing funny things with pointers.
  • "still reachable" means your program is probably ok -- it didn't free some memory it could have. This is quite common and often reasonable. Don't use --show-reachable=yes if you don't want to see these reports.