How to run cv_bridge?

edit

hi , i want to run cv_bridge, so i refer to Converting between ROS images and OpenCV images (C++) i did every thing were told at" An example ROS node" at the end i added the commad below to the end of CMakelist.txt and after that run catkin_make

add_executable(image_converter src/image_converter.cpp)
target_link_libraries(image_converter ${catkin_LIBRARIES})
add_dependencies(image_converter beginner_tutorials_generate_messages_cpp)

but i have 2 problems : 1. when i run catkin_make i receive this error :

CMake Error: Error in cmake code at
/home/fatima/catkin_ws3/src/beginner_tutorials/CMakeLists.txt:135:
Parse error.  Expected a command name, got unquoted argument with text "/add_executable".

1. and if it can be run , how to run image_converter file and how to see the result of cv_bridge ?

hi thnks for reply , this is my CMakelists: i dont know is it true for cv_bridge or not?

cmake_minimum_required(VERSION 2.8.3)
project(beginner_tutorials)


find_package(catkin REQUIRED COMPONENTS
  cv_bridge
  image_transport
  roscpp
  rospy
  sensor_msgs
  std_msgs
genmsg message_generation
)

add_message_files(FILES Num.msg )
add_service_files(FILES AddTwoInts.srv)



 generate_messages(
   DEPENDENCIES
sensor_msgs
cv_bridge
roscpp
std_msgs
image_transport
 )
generate_messages(DEPENDENCIES std_msgs)
catkin_package( INCLUDE_DIRS include
 LIBRARIES ${beginner_tutorials} CATKIN_DEPENDS message_runtime roscpp nodelet)
catkin_package(  )


include_directories(
  ${catkin_INCLUDE_DIRS}
)
catkin_package()
add_library()/add_executable()/target_link_libraries(
add_library(beginner_tutorials
  src/${PROJECT_NAME}/beginner_tutorials.cpp
 )


add_dependencies(beginner_tutorials ${${PROJECT_NAME}_EXPORTED_TARGETS} ${catkin_EXPORTED_TARGETS})


add_dependencies(beginner_tutorials_node ${${PROJECT_NAME}_EXPORTED_TARGETS} ${catkin_EXPORTED_TARGETS})


 target_link_libraries(beginner_tutorials_node
   ${catkin_LIBRARIES}
 )

add_executable(image_converter src/image_converter.cpp)
target_link_libraries(image_converter ${catkin_LIBRARIES})
add_dependencies(image_converter beginner_tutorials_generate_messages_cpp)

And now after fixing the last problem i have again another problem with generate_messages : CMakeLists :

cmake_minimum_required(VERSION 2.8.3)
project(beginner_tutorials)


find_package(catkin REQUIRED COMPONENTS
  cv_bridge
  image_transport
  roscpp
  rospy
  sensor_msgs
  std_msgs
genmsg message_generation
)

################################################
## Declare ROS messages, services and actions ##
################################################


## Generate messages in the 'msg' folder

add_message_files(FILES Num.msg )
add_service_files(FILES AddTwoInts.srv)


## Generate services in the 'srv' folder
# add_service_files(
#   FILES
#   Service1.srv
#   Service2.srv
# )

## Generate actions in the 'action' folder
# add_action_files(
#   FILES
#   Action1.action
#   Action2.action
# )

## Generate added messages and services with any dependencies listed here
 generate_messages(
   DEPENDENCIES
sensor_msgs
cv_bridge
roscpp
std_msgs
image_transport
#  sensor_msgs#   std_msgs
 )
##generate_messages(DEPENDENCIES std_msgs)
catkin_package( INCLUDE_DIRS include
 LIBRARIES ${beginner_tutorials} CATKIN_DEPENDS message_runtime roscpp nodelet)

# include_directories(include)
include_directories(
  ${catkin_INCLUDE_DIRS}
)
catkin_package()
##add_library()/add_executable()/target_link_libraries()
## Declare a C++ library
add_library(beginner_tutorials
  src/${PROJECT_NAME}/beginner_tutorials.cpp
 )

## Add cmake target dependencies of the library
## as an example, code may need to be generated before libraries
## either from message generation or dynamic reconfigure
add_dependencies(beginner_tutorials ${${PROJECT_NAME}_EXPORTED_TARGETS} ${catkin_EXPORTED_TARGETS})

## Declare a C++ executable
# add_executable(beginner_tutorials_node src/beginner_tutorials_node.cpp)

## Add cmake target dependencies of the executable
## same as for the library above
add_dependencies(beginner_tutorials_node ${${PROJECT_NAME}_EXPORTED_TARGETS} ${catkin_EXPORTED_TARGETS})

## Specify libraries to link a library or executable target against
 target_link_libraries(beginner_tutorials_node
   ${catkin_LIBRARIES}
 )

## Add gtest based cpp test target and link libraries
# catkin_add_gtest(${PROJECT_NAME}-test test/test_beginner_tutorials.cpp)
# if(TARGET ${PROJECT_NAME}-test)
#   target_link_libraries(${PROJECT_NAME}-test ${PROJECT_NAME})
# endif()

## Add folders to be run by python nosetests
# catkin_add_nosetests(test)
add_executable(image_converter src/image_converter.cpp)
target_link_libraries(image_converter ${catkin_LIBRARIES})
add_dependencies(image_converter beginner_tutorials_generate_messages_cpp)

and this is my catkin_make Error :

Base path: /home/fatima/catkin_ws3
Source space: /home/fatima/catkin_ws3/src
Build space: /home/fatima/catkin_ws3/build
Devel space: /home/fatima/catkin_ws3/devel
Install space: /home/fatima/catkin_ws3/install
####
#### Running command: "make ...