C Struct / C++ Class comparison

Let's keep things neat. Rather than post everything in one place, I've pasted each file in its own paste. As a bonus, they also get syntax highlighting.

class.cpp:
http://pastebin.com/mUjbcsaL

class.h:
http://pastebin.com/0ZK25wvt

main.cpp:
http://pastebin.com/hQLYfQEb

struct.c:
http://pastebin.com/vyvTm8dS

struct.h:
http://pastebin.com/qqjp62QM

main.c:
http://pastebin.com/mLS0NVVE

The above six files do exactly the same thing, except one is implemented in C as a struct + similarly named functions, while the other is implemented in C++ as a class

Edit: I've moved the URLs to their own line so that it's easy to triple-click and select them

Here's the output:

from main.c + struct.c:

% gcc main.c struct.c -o struct
% valgrind ./struct
==3195== Memcheck, a memory error detector
==3195== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==3195== Using Valgrind-3.10.0.SVN and LibVEX; rerun with -h for copyright info
==3195== Command: ./struct
==3195==
John Smith, a male, is 44 years old
Sally Smythe, a female, is 33 years old
Alice Kingsley, a female, is 86 years old
John Smith says Goodbye
Sally Smythe says Goodbye
==3195==
==3195== HEAP SUMMARY:
==3195==     in use at exit: 0 bytes in 0 blocks
==3195==   total heap usage: 2 allocs, 2 frees, 80 bytes allocated
==3195==
==3195== All heap blocks were freed -- no leaks are possible
==3195==
==3195== For counts of detected and suppressed errors, rerun with: -v
==3195== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)

Good!
- - - -

from main.cpp + class.cpp:

% g++ main.cpp class.cpp -o class
main.cpp: In function ‘int main()’:
main.cpp:4:53: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings]
     Person *john = new Person("John Smith", 44, male);
                                                     ^
main.cpp:5:58: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings]
     Person *sally = new Person("Sally Smythe", 33, female);
                                                          ^
main.cpp:9:46: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings]
     Person local("Alice Kingsley", 86, female);
                                              ^
[Simple warnings about sending string literals. Can be fixed by changing the `char *name` member of Person to `const char *name`.]

% valgrind ./class
==15787== Memcheck, a memory error detector
==15787== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==15787== Using Valgrind-3.10.0.SVN and LibVEX; rerun with -h for copyright info
==15787== Command: ./class
==15787==
John Smith, a male, is 44 years old
Sally Smythe, a female, is 33 years old
Alice Kingsley, a female, is 86 years old
John Smith says Goodbye
Sally Smythe says Goodbye
Alice Kingsley says Goodbye <-- Notice how Alice was destroyed without having to do anything
==15787==
==15787== HEAP SUMMARY:
==15787==     in use at exit: 0 bytes in 0 blocks
==15787==   total heap usage: 2 allocs, 2 frees, 32 bytes allocated
==15787==
==15787== All heap blocks were freed -- no leaks are possible
==15787==
==15787== For counts of detected and suppressed errors, rerun with: -v
==15787== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)

Good!
- - - -

Difference in performance:

% time ./struct (5 times)

real    0m0.003s  0m0.004s  0m0.003s  0m0.003s  0m0.004s
user    0m0.000s  0m0.000s  0m0.004s  0m0.000s  0m0.000s
sys     0m0.000s  0m0.000s  0m0.000s  0m0.000s  0m0.000s

% time ./class (5 times)
real    0m0.005s  0m0.005s  0m0.005s  0m0.004s  0m0.005s
user    0m0.000s  0m0.000s  0m0.000s  0m0.000s  0m0.000s
sys     0m0.000s  0m0.004s  0m0.004s  0m0.000s  0m0.004s

Barely a 1/500 second difference

- - - -

Difference in size (after stripping):

% ls -l struct class
-rwxrwxr-x 1 braden braden  6312 Sep 30 08:49 struct
-rwxrwxr-x 1 braden braden 10536 Sep 30 08:49 class

The C++ binary Nearly twice the size as the C binary. It's just 4.2 KB though.

Since C++ and C work nearly the same, internally, performance is clearly not an issue, however, as you can see, the executable is considerably larger. I wouldn't worry about it, though. This example is small scale, and the difference in size is a mere 4 KB. This more than likely plateaus when it comes to larger projects.