If you want to filter out certain errors you can suppress these. First you need to create a suppressions file. The format is:

[error id]:[filename]:[line]
[error id]:[filename2]
[error id]

The error id is the id that you want to suppress. The easiest way to get it is to use the --xml command line flag. Copy and paste the id string from the xml output.

Here is an example:

memleak:file1.cpp
exceptNew:file1.cpp
uninitvar

You can then use the suppressions file:

cppcheck --suppressions suppressions.txt src/