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Tip of the Day
Language: C++
Expertise: Beginner
Dec 19, 2000

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Building the Right Environment to Support AI, Machine Learning and Deep Learning


Forward Declaration of Classes and Structs


You can use the keywords class and struct in forward declarations interchangeably. For example:
 
class X; // fwd declaration uses 'class'
X *p;
struct X // definition uses 'struct'
{};
void f()
{
 p=new X;
}

It works the other way around, too:
 
struct X; 
X *p;
class X 
{};
Danny Kalev
 
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