C++: How to catch an exception from a thread

I'm trying to catch an exception of a thread from outside but I can't, here is my code:

#include <iostream>
#include <thread>
#include <chrono>

void func1()
{
    while (true)
    {
        std::cout<<"thread 1"<<std::endl;
        std::this_thread::sleep_for(std::chrono::milliseconds(2000));
    }
}

void func2()
{
    int i = 0;
    while (true)
    {
        std::cout<<"thread 2"<<std::endl;
        std::this_thread::sleep_for(std::chrono::milliseconds(2000));
        if (i++ == 3)
        {
            throw 1;
        }
    }
}

int main()
{
    try{
    std::thread t1(func1);
    std::thread t2(func2);
    t2.join();
    t1.join();
    }catch(int e){
        std::cout<<"exception catched!"<<std::endl;
    }
    std::cout<<"main end"<<std::endl;
    return 0;
}

However, I get a core dumped immediately, it doesn't seem that I caught the exception:

thread 1
thread 2
thread 1
thread 2
thread 1
thread 2
thread 1
thread 2
thread 1
terminate called after throwing an instance of 'int'
Aborted (core dumped)