decimal, hexadecimal and octal output 1.2 [integer birth year]

Bjarne Stroustrup “Programming Principles and Practice Using C++”
Chapter 11 Drill 3
Using std_lib_facilities.h by Bjarne Stroustrup.

[code language=”cpp”]
// Philipp Siedler
// Bjarne Stroustrup’s PPP
// Chapter 11 Drill 3

#include "std_lib_facilities.h"

int birth_year = 1988;

int main()
try
{
cout << "decimal " << dec << birth_year << endl;
cout << "hexadecimal " << hex << birth_year << endl;
cout << "octadecimal " << oct << birth_year << endl;

keep_window_open();
}
catch (runtime_error e) {
cout << e.what() << endl;
keep_window_open();
}
catch (…) {
cout << "Exiting" << endl;
keep_window_open();
}
[/code]

Output:
decimal 1988
hexadecimal 7c4
octadecimal 3704
Please enter a character to exit