Bjarne Stroustrup “Programming Principles and Practice Using C++”
Chapter 14 Drill 7
Using std_lib_facilities.h by Bjarne Stroustrup.
[code language=”cpp”]
// Philipp Siedler
// Bjarne Stroustrup’s PP
// Chapter 14 Drill 7
#include "std_lib_facilities.h"
using namespace std;
class B2
{
public:
virtual void pvf() = 0;
};
class D21 : public B2
{
public:
void pvf() { cout << data << endl; }
string data;
};
class D22 : public B2
{
public:
void pvf() { cout << val << endl; }
int val;
};
void f(B2& b2_ref) {
b2_ref.pvf();
}
int main()
try
{
D21 d21;
d21.data = "hello";
D22 d22;
d22.val = 5;
f(d21);
f(d22);
keep_window_open();
}
catch (exception& e) {
cout << e.what() << endl;
return 1;
}
catch (…) {
cout << "Exiting" << endl;
return 2;
}
[/code]
Output: hello 5 Please enter a character to exit
