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#include <iostream>

using namespace std;

static int call_countdown = 3;
typedef int (*MyCallbackFun)();
int foo(MyCallbackFun cb, int count)
{
    static int foo_counter = 0;
    ++foo_counter;
    cout << "enter foo[" << foo_counter <<"]: " << count << endl;
    int result = cb();
    cout << "exit foo[" << foo_counter << "]: " << result << endl;
    return result;
}
int bar()
{
    static int bar_counter = 0;
    ++bar_counter;
    cout << "bar[" << bar_counter << "]" << endl;
    return -1;
}
int main()
{
    static int call_counter = 0;
    ++call_counter;
    cout << "enter main[" << call_counter << "]" << endl;

    int result = 0;
    if (call_counter < 5)
    {
        result = (call_counter>2)
            ? foo(bar, call_counter)
            : foo(main, call_counter);
    }
    cout << "exit main[" << call_counter << "]: " << result << endl;

    return call_counter;
}

enter main[1]
enter foo[1]: 1
enter main[2]
enter foo[2]: 2
enter main[3]
enter foo[3]: 3
bar[1]
exit foo[3]: -1
exit main[3]: -1
exit foo[3]: 3
exit main[3]: 3
exit foo[3]: 3
exit main[3]: 3

lopatir wrote:

latest john wick - cgi ad nauseam with barely any discernible plot

dandy72 wrote:

Oh, and how does Keanu Reeves keep getting work?

Daniel Pfeffer wrote:

The engineering required for long-term presence on Mars is much more than provision of food, water, air, and power.