Description 补足程序使得其输出结果是: 40 #include <iostream> #include <string> using namespace std; struct A { int n; A() { }; A(int n_ ):n(n_) { } // Your Code Here }; int main() { A c; const A a(10); c = a + A(30); cout << c.n << endl; retur
public class Environment { /** * Return root of the "system" partition holding the core Android OS. * Always present and mounted read-only. */ public static File getRootDirectory() /** * Return root directory of the "oem" partition hol