lst-0011-book.cpp
// https://godbolt.org/z/bEKaYdssE
#include <iostream>
#include <ios>
using std::cout; using std::endl;
void f() {
int val = 100;
cout << val << endl; // Output: 0x64
}
int main() {
int val = 255;
cout << std::showbase;
cout << std::dec << val << endl; // Output: 255
cout << std::hex << val << endl; // Output: 0xff
f();
cout << std::oct << val << endl; // Output: 0377
cout << val << std::endl; // Output: 0377
}