‘Publisher’ was not declared in this scope

edit

my source:

#include "ros/ros.h"
#include "oroca_ros_tutorials/msgTutorial.h"


int main(int argc,char **argv)
{
ros::init(argc,argv,"ros_tutorial_msg_publisher");
ros::NodeHandle nh;
ros:Publisher ros_tutorial_pub=nh.advertise<oroca_ros_tutorials::msgTutorial>("ros_tutorial_msg",100);
ros::Rate loop_rate(10);
int count = 0;
while(ros::ok){
oroca_ros_tutorials::msgTutorial msg;
msg.data=count;
ROS_INFO("send msg =%d",count);
ros_tutorial_pub.publish(msg);
loop_rate.sleep();
++count;
}
return 0;
}

I did catkin_make to build ...and..error...came out Error:

 /home/young/catkin_ws/src/oroca_ros_tutorials/src/ros_tutorial_msg_publisher.cpp:9:5: error: ‘Publisher’ was not declared in this scope

why?? Help....