//
//
//
//
// Lab. Calcolo II - Esempio di codice
//
//
//
//
//
//
// <![CDATA[
// Example code: Pointers and de-reference.
// (francesco.prelz@mi.infn.it 20060810)
#include <iostream>
#include <string>
#include "measurement.h" // Our beloved measurement template.
template <typename MVAL>
void measurement_handler_ptr(measurement<MVAL> *arg)
{
//arg could be undefined!
if (!arg)
{
std::cerr << "Warning: measurement_handler_ptr called with null arg." << std::endl;
return;
}
std::cout << "Hello " << arg->get_observer() << " your value is "
<< arg->value() << std::endl;
arg->value() = 4.567;
}
int
main(int argc, char *argv[])
{
measurement<double> meas (3.141516, "31 Dec 1999", "Mino Cancelli");
measurement<double> *junk=0;
measurement_handler_ptr(junk);
measurement_handler_ptr(&meas);
measurement_handler_ptr(&meas);
return 0;
}
]]></plaintext></span>