Why are errors highlighted incorrectly in NetBeans in c++?

Question

NetBeans

I just downloaded this IDE, I have a mac. Here is the code:

#include <iostream>
using namespace std;

int main(int argc, char** argv) {
    cout << "a";
    return 0;
}

The IDE highlights the first two lines and cout as wrong, and everything compiles fine. How can this be fixed?