how to change an arduino code into a publisher

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enter code here #include <ros.h> #include <ros time.h=""> #include <sensor_msgs range.h=""> #include <std_msgs int32.h=""> #include <encoder.h>

ros::NodeHandle nh;
sensor_msgs::Range range_msg;
ros::Publisher pub_range( "range_data", &range_msg);

// Change these pin numbers to the pins connected to your encoder.
//   Best Performance: both pins have interrupt capability
//   Good Performance: only the first pin has interrupt capability
//   Low Performance:  neither pin has interrupt capability
Encoder encoder1(44, 45);
Encoder encoder2(46, 47);
Encoder encoder3(48, 49);
Encoder encoder4(50, 51);
//   avoid using pins with LEDs attached

void setup() {
  nh.initNode();
  nh.advertise(pub_range);

  Serial.begin(9600);
  Serial.println("Four Encoder Test:");
  for(int i=44;i<=51;i++)digitalWrite(i,1);   
}

long positionencoder1 = -999;
long positionencoder2 = -999;
long positionencoder3 = -999;
long positionencoder4 = -999;

void loop() {
  char buffer[50];

  long newencoder1, newencoder2, newencoder3, newencoder4;
  newencoder1 = encoder1.read();
  newencoder2 = encoder2.read();
  newencoder3 = encoder3.read();
  newencoder4 = encoder4.read();
  if (newencoder1 != positionencoder1 || newencoder2 != positionencoder2 || newencoder3 != positionencoder3 || newencoder4 != positionencoder4) {
 {
   sprintf(buffer, "E1 = %ld", encoder1.read());
   nh.loginfo(buffer);
   sprintf(buffer, "E2 = %ld", encoder2.read());
   nh.loginfo(buffer);
   sprintf(buffer, "E3 = %ld", encoder3.read());
   nh.loginfo(buffer);
   sprintf(buffer, "E4 = %ld", encoder4.read());
   nh.loginfo(buffer);
   Serial.println();
   positionencoder1 = newencoder1;
   positionencoder2 = newencoder2;
   positionencoder3 = newencoder3;
   positionencoder3 = newencoder4;

   pub_range.publish(&range_msg);
   nh.spinOnce();
 }
 }
 }