我在使用AS3的Flash CS6上制作了一款游戏。游戏在屏幕的右侧有一个太空船,它向随机出现在右边的外星人发射子弹。游戏是完美的工作,但每当我玩它时,我得到这个错误。 TypeError: Error #1009: Cannot access a property or method of a null object reference.
at alien3/pulse()[/Users/Ma
考虑下面的代码: #include <stdio.h>
namespace EnclosingNmspc
{
namespace Nmspc
{
extern int a;//This a and the a defined above denote the same entity
int a=5;
}
}
extern int a
我知道大约从C标准以下摘录介绍Ç链接规则: 1/ An identifier declared in different scopes or in the same scope more than once can be made to refer to the same object or function by a process called linkage. There are three