lasd/teoria/esempi_professore/examples/allocation/main.cpp

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2021-03-21 00:41:19 +01:00
#include <iostream>
using namespace std;
int main() {
try {
ulong* ulptr = new ulong; // Uninitialized unsigned long
// ulong* ulptr = new ulong(5); // new ulong{5} // Unsigned long initialized to 5
cout << (*ulptr)++ << endl;
cout << *ulptr << endl;
delete ulptr; // ulptr = nullptr;
// delete ulptr; // Double free cannot be catched!
} catch (bad_alloc exc) {
cout << "Quite rare exception!" << endl;
}
try {
const ulong arraysize = 3; // 10000000000
ulong* ulptr = new ulong[arraysize]; // Uninitialized array of three unsigned longs
// ulong* ulptr = new ulong[arraysize]{}; // array of three unsigned longs initialized to the default value (0)
// ulong* ulptr = new ulong[arraysize]{5, 6, 7}; // array of three unsigned longs initialized to 5, 6, and 7.
cout << ulptr[0]++ << endl;
cout << ulptr[1] << endl;
cout << ulptr[2]-- << endl << endl;
cout << ulptr[0] << endl;
cout << ulptr[1] << endl;
cout << ulptr[2] << endl;
delete[] ulptr; // ulptr = nullptr;
// delete[] ulptr; // Double free cannot be catched!
} catch (bad_alloc exc) {
cout << "Quite rare exception!" << endl;
}
return 0;
}