【简答题】abstract class A{ public abstract void f(int x); public abstract void g(int x,int y); public abstract double h(double x); } class A1 extends A{ public void f(int x){ System.out.println(x); } public vo...
【简答题】如下程序的输出是什么? #include int Sub (int x, int y); int main () { int x = 2; int y = 3; int z; z = Sub (x, y); x = Sub (y, z); y = Sub (x, y); printf ("%d %d %d", x, y, z); } int Sub (int y, int x) { return ...