The difference between C and C + + when using Pthread_create to create threads

The use of Pthread_create

int Pthread_create (pthread_t*, const pthread_attr_t*, void* (*) (void*), void*)

To make the g++ compile, the following methods are:

C + + prohibits assigning void pointers to other pointers at random.
So you get an error when you convert the entry of the void thread (void) function to void*, and then you call Pthread_create as a parameter, because the pthread_create argument should be a pointer like void* fun (void*) A pointer to a function.
You can modify void thread (void) to void* thread (void*), and then remove the (void*) cast at the time of the call, eliminating the error.

Cases:

void* Thread (void*) {
	int i;
	for (int i=0; i<3; i++) {
		cout << ' This is a thread ' << Endl;
	}
}

int main (int arg, char** argv) {
	pthread_t id;

	int I, ret;

	ret = pthread_create (&id, NULL, thread, NULL);

	if (ret!= 0) {
		cout << "Create thread error!" << Endl;
		Exit (1);
	}
	cout << "This is the main process" << Endl;
	Pthread_join (ID, NULL);
	return (0);
}

Change to GCC

void thread (void) {
	int i;
	for (int i=0; i<3; i++) {
		cout << ' This is a thread ' << Endl;
	}
}

int main (int arg, char** argv) {
	pthread_t id;

	int I, ret;

	ret = pthread_create (&id, NULL, (void *) thread, NULL);

	if (ret!= 0) {
		cout << "Create thread error!" << Endl;
		Exit (1);
	}
	cout << "This is the main process" << Endl;
	Pthread_join (ID, NULL);
	return (0);
}