Write a program that prints "hello, world! " from a child process it creates and prints the ids of the child and parent processes in the format "the child and parent process ids are: 1234 and 1235." a failure of fork() should be caught and printed as an error message using err_sys call.

#include <stdio.h>

#include <stdlib.h>

#include <sys/wait.h>

#include <unistd.h>

#include <sys/types.h> //NOTE: Added

void err_sys(const char *x)

{

printf("\n");

perror(x);

printf("\n");

exit(1);

}

void main()

{

pid_t pid;

if( (pid = fork()) == -1 )

{

err_sys("fork failed");

}

else if( pid == 0 )

{

printf("\nHello, World!\n");

printf("The child and parent ids are: %d and %d.\n\n", getpid(), getppid());

}

else

{

wait(NULL);

}

}

the warning light flashes for a second or two when the engine starts. if it stays on, there's must be something wrong with the coolant. you should never dare to continue driving when the light is on. pull over as soon as possible and shut the engine off.

hope this is what you're talking about

answer:

it thinks that you spelled something wrong.

explanation: