c 2b 2b struct vs class

1// In C++, a class and a struct are COMPLETELY IDENTICAL
2// Except structs default to PUBLIC access and inheritance
3// Whereas class defaults to PRIVATE.

11) Members of a class are private by default and members of a struct are public
2by default.
3For example program 1 fails in compilation and program 2 works fine.
4
5/ Program 1 
6#include <stdio.h> 
7  
8class Test { 
9    int x; // x is private 
10}; 
11int main() 
12{ 
13  Test t; 
14  t.x = 20; // compiler error because x is private 
15  getchar(); 
16  return 0; 
17} 
18
19// Program 2 
20#include <stdio.h> 
21  
22struct Test { 
23    int x; // x is public 
24}; 
25int main() 
26{ 
27  Test t; 
28  t.x = 20; // works fine because x is public 
29  getchar(); 
30  return 0; 
31}