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C++ Programming

Your program must create a child thread per integer value in the input file.  Each child thread will send a request to the server with the integer value to encode using stream sockets

INSTRUCTIONS TO CANDIDATES
ANSWER ALL QUESTIONS

You must write two programs to implement a distributed version of the Elias-Gamma coding algorithm (https://en.wikipedia.org/wiki/Elias_gamma_coding). These programs are:

The client program:

The user will execute this program using the following syntax:

./exec_filename hostname port_no < input_filename

where exec_filename is the name of your executable file, hostname is the address where the server program is located, port_no is the port number used by the server program, and input_filename is the name of the file with the integer values to encode.

Your program must create a child thread per integer value in the input file.  Each child thread will send a request to the server with the integer value to encode using stream sockets. After the child threads receive the binary code and the Elias-Gamma code from the server, they will write the generated codes on a memory location available to the main thread. Finally, the main thread will print the information about the binary code and Elias-Gamma code for each number in the input file.

The child threads will execute the following tasks:

  1. Send the integer number to the server program using sockets.
  2. Wait for the generated codes (binary and Elias-Gamma) from the server program.
  3. Write the received information into a memory location accessible by the main thread.
  4. Finish its execution.

Input Format: Your program should read its input from stdin (C++ cin) and use input redirection.
 
The input file will have n+1 integer values, where the first value is the number of integer values in the file, and the next n values are the integer values that your program will read to generate the codes (binary and Elias-Gamma).

Example Input File:

7
1
10
13
2
5
4
8

The server program:

The user will execute this program using the following syntax:

./exec_filename port_no

where exec_filename is the name of your executable file, and port_no is the port number to create the socket.

This program receives requests from the child threads of the client program using sockets. It creates a child process per request. For this reason, the parent process needs to handle zombies processes implementing the fireman() call in the primer. Each child process will generate the binary code and the Elias-Gamma code of the requested input file, returning the results to the client program using sockets.

The server program will not print any information to STDOUT.

Example:

Given de previous input file the expected output for the client program is:   

Value: 1, Binary Code: 1, Elias-Gamma code: 1Value: 10, Binary Code: 1010, Elias-Gamma code: 0001010Value: 13, Binary Code: 1101, Elias-Gamma code: 0001101Value: 2, Binary Code: 10, Elias-Gamma code: 010Value: 5, Binary Code: 101, Elias-Gamma code: 00101Value: 4, Binary Code: 100, Elias-Gamma code: 00100Value: 8, Binary Code: 1000, Elias-Gamma code: 0001000

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