Programming

#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <unistd.h>
#include <sys/types.h> 
#include <sys/wait.h> 
#include <stdlib.h>

using namespace std;


int main (int argc,char* argv[])
{

const int size = argc-1;
int sizeArray = 0;
int numofProc =0;
int arrayofNum[size];
int status;
int value;

for(int y=1; y<argc; y++)
{

arrayofNum[y-1] = atoi(argv[y]);
sizeArray++;

}

if(sizeArray % 2 !=0)
{

arrayofNum[sizeArray]  = 0;
sizeArray++;

}

numofProc = sizeArray/2;


    //declaration of a process id variable
    pid_t pid;

    //fork a child process is assigned 
    //to the process id
    pid=fork();

    //code to show that the fork failed
    //if the process id is less than 0
    if(pid<0)
    {
        cout<<"Fork Failed";// error occurred
        exit(-1); //exit
    }

    //code that runs if the process id equals 0
    //(a successful for was assigned
    else 
	if(pid==0)
    {
        //this statement creates a specified child process
         execlp("./worker", "worker", arrayofNum[0], arrayofNum[1]);//child process

    }

    //code that exits only once a child 
    //process has been completed
    else
    {
	waitpid(pid, &status, 0);
cout<<status;


	}

//main
}

#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>


using namespace std;

int main(int argc, char* argv[])
{

	int arrayofNum[argc-1];

	arrayofNum[0] = atoi(argv[1]);
	arrayofNum[1] = atoi(argv[2]);

	int sum = arrayofNum[0] + arrayofNum[1];



	exit(sum);


}

if (waitpid(pid, &status, 0) > 0)  // you have a valid return
{
    if(WIFEXITED(status) )
    {
       int retcode=WIFEXITSTATUS(status);
       printf("ret code is %d\n", retcode);
     }
}

int execlp(const char *file, const char *arg0, ...
          /* const char *argn, (char *)0 */);