Question

I have no idea why this doesn’t work

#include <iostream>
#include <pthread.h>
using namespace std;

void *print_message(){

    cout << "Threading\n";
}



int main() {

    pthread_t t1;

    pthread_create(&t1, NULL, &print_message, NULL);
    cout << "Hello";

    return 0;
}

The error:

[Description, Resource, Path, Location, Type] initializing argument 3
of ‘int pthread_create(pthread_t*, const pthread_attr_t*, void*
(*)(void*), void*)’ threading.cpp threading/src line 24 C/C++
Problem

Answer 1

You should declare the thread main as:

void* print_message(void*) // takes one parameter, unnamed if you aren't using it