问题描述 c#新手,在一个xna模板中看到一个按键函数,看不懂,求前辈指点 public bool IsNewKeyPress(Keys key, PlayerIndex? controllingPlayer, out PlayerIndex playerIndex) { if (controllingPlayer.HasValue) { // Read input from the specified player. playerIndex = controllingPlayer.Value;
问题描述 源自一个面试的问题:字符串在函数的参数中是当成值传递还是引用传递.这是测试方法: public void setA(String a) { System.out.println("In the setmethod before set:解决方案二:# " + a); a = "I am a student"; System.out.println("In the setmethod after set:解决方案三:# " + a); }