Question

Please look at the following code. When I run it from the command line, I am supposed to get the following results:

1: I am
1: I am

I need to fix it so that the functions 'print_i' and 'print_j' print all of their lines. What do I need to add? Thank you.

C source code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <unistd.h>

// These two functions will run concurrently
void* print_i(void *ptr)
{
printf("1: I am \n");
sleep(1);
printf("in i\n");
}

void* print_j(void *ptr)
{
printf("2: I am \n");
sleep(1);
printf("in j\n");
}

int main() {

pthread_t t1,t2;
int rc1 = pthread_create(&t1, NULL, print_i, NULL);
int rc2 = pthread_create(&t2, NULL, print_j, NULL);

exit(0);
}

Answer 1

Step(1)

First Of all You Try To implement A thread Concept ,let me elaborate Thread First then I give Solution For your Code As well.

A thread of execution is a sequence of instructions that can be executed concurrently with other such sequences in multithreading environments, while sharing a same address space.

An initialized thread object represents an active thread of execution; Such a thread object is joinable, and has a unique thread id.

A default-constructed (non-initialized) thread object is not joinable, and its thread id is common for all non-joinable threads.

Step(2)

I Try to write a code in C

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <unistd.h>

// These two functions will run concurrently
void* print_i(void *threadid)
{
printf("1: I am \n");
sleep(1);
printf("in i\n");
}

void* print_j(void *threadid)
{
printf("2: I am \n");
sleep(1);
printf("in j\n");
}

int main()
{

pthread_t t1,t2;
int rc1 = pthread_create(&t1, NULL, print_i, (void *)1);
int rc2 = pthread_create(&t2, NULL, print_j, (void *)2);

// Wait for the threads to finish
pthread_join(t1, NULL);
pthread_join(t2, NULL);

exit(0);
}

Output

1: I am                                                                                                                                                    

1: I am                                                                                                                                                    

in i                                                                                                                                                       

in i  

Step(3)

SceenShot Of Program

Output

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