Difference between C++ class and struct

yaojingguo

C++ Standard has an explanation for the difference. The first difference is described in 11.2 [size=11.6667px]Accessibility of base classes and base class members
 

In the absence of an access-specifier for a base class, public is assumed when the derived class is defined with [size=11.6667px]the class-key struct and private is assumed when the class is defined with the class-key class.
 
The second difference is described in 11.1 Access specifiers. The explanation is in comments in the example code.
 
The following code shows this difference.
 

#include <iostream>using namespace std;struct SPerson {  void hello() const {    cout << "hello\n";  }};class CPerson {  void hello() const {    cout << "hello\n";  }};class Base {  public:    void hello() const {      cout << "hello\n";    }};struct SDerived: Base {};class CDerived: Base {};int main(int argc, const char *argv[]) {  SPerson sp;  sp.hello();  CPerson cp;  cp.hello(); // compile error  SDerived sd;  sd.hello();  CDerived cd;  cd.hello(); // compile error  return 0;} http://stackoverflow.com/questions/92859/what-are-the-differences-between-struct-and-class-in-c is a discussion about the difference. Since [size=11.6667px]stackoverflow can't be accessed sometimes in China, I write this post.