?? union.cpp
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//: C03:Union.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 2000
// Copyright notice in Copyright.txt
// The size and simple use of a union
#include <iostream>
using namespace std;
union Packed { // Declaration similar to a class
char i;
short j;
int k;
long l;
float f;
double d;
// The union will be the size of a
// double, since that's the largest element
}; // Semicolon ends a union, like a struct
int main() {
cout << "sizeof(Packed) = "
<< sizeof(Packed) << endl;
Packed x;
x.i = 'c';
cout << x.i << endl;
x.d = 3.14159;
cout << x.d << endl;
} ///:~
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