Answered: Convert from C to C++ .Thank you. /…

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Convert from C to C++ .Thank you.

/ include all required libraries
#include<stdio.h>
#include<stdlib.h>
#include<sys/types.h>
#include<sys/wait.h>
#include<unistd.h>

// variable to store number of generations
int num_generations;

// function to print the generations
void printGeneration(int n)
{
// stop if number of generations are reached
if(n>num_generations)
return;

// create a fork
pid_t p = fork();

// generate new generations
if(p==0)
printGeneration(n+1);
else if(p>0)
wait(0); // wait until child process terminates

// print the present generation
if(p!=0)
{
// if n is 0
if(n==0)
printf("Parent. "); // print parent
// if n is 1
else if(n==1)
printf("Child. "); // print child
// for all other cases
else
{
// print grandchildren
for(int i=0;i<n-2;i++)
printf("Great ");
printf("Grandchild. ");
}
// print pid and ppid
printf("pid: %d ppid: %d\n",getpid(),getppid());
}
}

// main function
int main(int argc, char* argv[])
{
// if no arguments are provided
if(argc==1)
{
// print usage
printf("Usage: ./generations num_generations\n");
}
else
{
// get the number of generations
num_generations = atoi(argv[1]);

// if number of generations is not positive
if(num_generations<=0)
{
// print error
printf("Error: num_generations must be greater than 0\n");
}
else
{
// print generations
printGeneration(0);
}
}
}

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