Thanks for the quick response. One more thing. After I made the changes you suggested, I was able to successfully "make" the node. I got the following error when I tried to launch the node:
[FATAL] [1285884626.766008172]: You must call ros::init() before creating the first NodeHandle
[FATAL] [1285884626.767366060]: BREAKPOINT HIT
file = /opt/ros/cturtle/ros/core/roscpp/src/libros/node_handle.cpp
line=140
[subscriber-3] process has died [pid 18638, exit code -5].
log files: /home/gavin/.ros/log/74977cc6-ccd5-11df-9b91-0007e97f99ca/subscriber-3*.log
I then went and added the middle line( ros::init . . . )
using namespace ros;
ros::init(argc, argv, "subscriber");
ros::NodeHandle n;
. . . . .
and I got the following errors when I tried to make the node:
/src/subscriber.cpp:11: error: expected constructor, destructor, or type conversion before ‘(’ token
make[3]: *** [CMakeFiles/subscriber.dir/src/subscriber.o] Error 1
Could you please explain what's happening? Thanks a lot!
-Gavin