Question & Answer: What would get printed in the following C code and why?…..

What would get printed in the following C code and why?

void *helper(void *arg){

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char *message = (char *) arg;

strcpy(message, “I am the child”);

return NULL;

}

int main(){

char *message = malloc(100);

strcpy(message, “I am the parent”);

pthread_t thread;

pthread_create(&thread, NULL, &helper, message);

pthread_join(thread, NULL);

printf(“%sn”, message);

return 0;

}

Expert Answer

Output:

I am the child

Here is code with explaination:

#include <pthread.h>

#include <string.h>

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <errno.h>

#include <ctype.h>

void *helper(void *arg){

char *message = (char *) arg;

strcpy(message, “I am the child”); // message variable assign “I am the child”

return NULL;

}

int main(){

char *message = malloc(100);

strcpy(message, “I am the parent”); // message variable has “I am the parent”

pthread_t thread; // thread variable

pthread_create(&thread, NULL, &helper, message); // created thread assigning the function helper function

pthread_join(thread, NULL); // invoke the function helper

printf(“%sn”, message); // prints the message

return 0;

}

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