C++参数参考

void Test(int a[]) 
{
    a[5] = 3;
}

只是替代语法:

void Test(int* a) 
{
    *(a+5) = 3;
}

没有数组传递,只是一个指针.原始数组已修改.

至于你的第二次修订,给出:

void Test(int a) 
{
}

void Best(int &a) 
{
}

然后

Test(aa);      // Passes aa by value.  Changes to a in Test() do not effect aa
Best(aa);      // Passes aa by reference; Changes to a DO effect aa
Best(&aa);     // Is a syntax error: Passing a pointer instead of an int.