//
// 7.6.bad.example.cpp
// chapter 7 parallelism and concurrency
// modern c++ tutorial
//
// created by changkun at changkun.de
// https://github.com/changkun/modern-cpp-tutorial
//
#include
#include
int main() {
int a = 0;
volatile int flag = 0;
std::thread t1([&]() {
while (flag != 1);
int b = a;
std::cout << "b = " << b << std::endl;
});
std::thread t2([&]() {
a = 5;
flag = 1;
});
t1.join();
t2.join();
return 0;
}