#include <iostream>
#include <setjmp.h>
jmp_buf go;
int foo()
{
    return 5;
}
int bar()
{
	longjmp(go,1);
    return 6;
}

int main(int argc, char* argv[])
{
	bool jumped = false;
	int (*ptr) ();
	// if arg then long jump
    if (argc != 2) 
    {
    	ptr = foo;
    } else {
	    ptr = bar;
    }

    for (int i = 0; i < 50000000; ++i)
    {
        ++i;
        --i;
    }
    setjmp(go);

    if (!jumped)
    {
    	jumped = true;
	    ptr();
    } else {
	    std::cout <<  "AFTER long jump." << std::endl; 
    }
    return 0;
}