added assignment 1

assignment_1/amit-patil_print_squares/CMakeLists.txt

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+cmake_minimum_required(VERSION 2.4.6)
+include($ENV{ROS_ROOT}/core/rosbuild/rosbuild.cmake)
+
+# Set the build type.  Options are:
+#  Coverage       : w/ debug symbols, w/o optimization, w/ code-coverage
+#  Debug          : w/ debug symbols, w/o optimization
+#  Release        : w/o debug symbols, w/ optimization
+#  RelWithDebInfo : w/ debug symbols, w/ optimization
+#  MinSizeRel     : w/o debug symbols, w/ optimization, stripped binaries
+#set(ROS_BUILD_TYPE RelWithDebInfo)
+
+rosbuild_init()
+
+#set the default path for built executables to the "bin" directory
+set(EXECUTABLE_OUTPUT_PATH ${PROJECT_SOURCE_DIR}/bin)
+#set the default path for built libraries to the "lib" directory
+set(LIBRARY_OUTPUT_PATH ${PROJECT_SOURCE_DIR}/lib)
+
+#uncomment if you have defined messages
+rosbuild_genmsg()
+#uncomment if you have defined services
+rosbuild_gensrv()
+
+#common commands for building c++ executables and libraries
+#rosbuild_add_library(${PROJECT_NAME} src/amitpatil_numbers.cpp)
+#target_link_libraries(${PROJECT_NAME} roscpp std_msgs)
+
+#rosbuild_add_boost_directories()
+#rosbuild_link_boost(${PROJECT_NAME} thread)
+rosbuild_add_executable(amit-patil_numbers src/amitpatil_numbers.cpp)
+rosbuild_add_executable(amit-patil_squares src/amitpatil_squares.cpp)
+rosbuild_add_executable(amit-patil_print src/amitpatil_print.cpp)
+
+
+
+#target_link_libraries(example ${PROJECT_NAME})

assignment_1/amit-patil_print_squares/Makefile

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+include $(shell rospack find mk)/cmake.mk

assignment_1/amit-patil_print_squares/README.md

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+amit-patil_print_suqares

assignment_1/amit-patil_print_squares/mainpage.dox

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+/**
+\mainpage
+\htmlinclude manifest.html
+
+\b amit_patil_print_squares 
+
+<!-- 
+Provide an overview of your package.
+-->
+
+-->
+
+
+*/

assignment_1/amit-patil_print_squares/manifest.xml

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+<package>
+  <description brief="amit_patil_print_squares">
+
+     amit_patil_print_squares
+
+  </description>
+  <author>AMIT</author>
+  <license>BSD</license>
+  <review status="unreviewed" notes=""/>
+  <url>http://ros.org/wiki/amit_patil_print_squares</url>
+  <depend package="roscpp"/>
+  <depend package="std_msgs"/>
+
+
+</package>
+
+

assignment_1/amit-patil_print_squares/src/amitpatil_numbers.cpp

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+/*
+includes all the necessary libraries required for common use. 
+*/
+#include "ros/ros.h"
+#include "std_msgs/Int32.h"
+
+int main(int argc,char **argv)
+{
+  ros::init(argc, argv, "numbers");
+  //initializes the ros and name the node as amit-patil_numbers
+  ros::NodeHandle n;
+  //creates handle to the node   
+  ros::Publisher num_pub = n.advertise<std_msgs::Int32>("topic_numbers", 100);//used for publishing messages on the topic ,'topic_numbers' of length upto 100
+  ros::Rate loop_rate(1);//publishes messages at frequency at 1 Hz 
+  int count = 1;//initialize counter
+  std_msgs::Int32 message;//message is of int 32
+  while (ros::ok())
+  {       
+    message.data = count;//message is equal to counter    
+    num_pub.publish(message);//message is published to topic through num_pub
+    ros::spinOnce();//processes callbacks
+    loop_rate.sleep();//sleeps for the remainimg  time to get 1hz frequency
+    ++count;//increment counter
+  }
+  return 0;
+}

assignment_1/amit-patil_print_squares/src/amitpatil_print.cpp

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+/*
+includes all the necessary libraries required for common use. 
+*/
+#include "ros/ros.h"
+#include "std_msgs/Int32.h"
+
+void numbersCallback(const std_msgs::Int32::ConstPtr& message)
+{
+  ROS_INFO("topic_numbers output: [%d]", message->data);
+}
+//output by topic_number
+void squaresCallback(const std_msgs::Int32::ConstPtr& message)
+{
+  ROS_INFO("topic_squares output: [%d]", message->data);
+}
+//output by topic_squares
+int main(int argc, char **argv)
+{
+  ros::init(argc, argv, "print");// initialize ros and node named amit-patil_print
+  ros::NodeHandle hdl;//handle is created for node   
+  ros::Subscriber sub_numbers = hdl.subscribe("/topic_numbers", 100, numbersCallback);//subscribes to topic 'topic_numbers' 
+  ros::Subscriber sub_squares = hdl.subscribe("/topic_squares", 100, squaresCallback);//subscribes to topic 'topic_squares'   
+  ros::spin();
+  return 0;
+}

assignment_1/amit-patil_print_squares/src/amitpatil_squares.cpp

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+/*
+includes all the necessary libraries required for common use. 
+*/
+#include <ros/ros.h>
+#include "std_msgs/Int32.h"
+
+//new class
+class square
+{
+public:
+  square()
+  {
+    pub = n.advertise<std_msgs::Int32>("/topic_squares", 1);//publishes square to topic 'topic_squares'    
+    sub = n.subscribe("/topic_numbers", 1, &square::callback, this);//subscribes to 'topic_number'
+  }
+
+  void callback(const std_msgs::Int32::ConstPtr& input)
+  {
+    std_msgs::Int32 output;//output of type int64
+    output.data = input->data*input->data;//square the input
+    pub.publish(output);
+  }
+
+private:
+  ros::NodeHandle n; 
+  ros::Publisher pub;
+  ros::Subscriber sub;
+
+};
+
+
+int main(int argc, char **argv)
+{
+  ros::init(argc, argv, "squares");//initializes ros and node 'amit-patil_squares'
+  square new_obj;//object created from class square
+  ros::spin();//process when node is shut down
+  return 0;
+}