C++相談室 part95

728 名前：デフォルトの名無しさん mailto:sage [2012/06/12(火) 00:28:10.44 ] >>724 やっと動いた　思ったより厄介だぞこれ union foo { int f; void operator=(int x) { f = x; } }; struct bar { foo a; union { int b; }; friend std::ostream& operator<<(std::ostream& os, foo& f); }; std::ostream& operator<<(std::ostream& os, foo& f) { std::cout << f.f; return os; } int main() { bar zot; zot.b = 123; zot.a = 456; int bar::*p = &bar::b; int x = zot.*p; // is zot.b foo bar::*q = &bar::a; foo y = zot.*q; // is zot.a.f std::cout << x << std::endl; std::cout << y << std::endl; }

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