C++ Programming - OOPS Concepts - Discussion

Option A is correct as well because this is the difference between Classes and structures that structures cannot have member functions while classes can.

The members of a struct are public by default, while in class, they default to private.

But the more technical:

Structure is an open container (i.e. Publicly open for everyone) that violate Encapsulation. That's why the Class is invented in c++.

Even the option A is correct. We don't have member functions declared in class.

@Ravi Mayank.

You are mixing up C and C++. C is not an OOP.

I tried the following code (test.c) with GCC and G++ compiler.
With GCC compiler its generating a compile error.
But with G++ its working fine.
-------------------------------------------------------------------------
#include<stdio.h>

struct mystruct{

int a ;

void display(void){
printf("Hello world...[%d]\n",a);
}
} s;

int main(){

s.a=10;

s.display();
return 0;
}
-------------------------------------------------------------------------

In C++ structure can contain member variable.

In C++, a structure is a class defined with the struct keyword. Its members and base classes are public by default. A class defined with the class keyword has private members and base classes by default. This is the only difference between structs and classes in C++.

Yes @Thas, structures can hold functions. Here is example,

struct SomeStruct {
int x, y, z;

void someFunction();
};

void SomeStruct::someFunction() {
// Code for someFunction...
}

So structure can hold member functions?

1.The data members of class are private by default and the data members of structure is public by default.
2.class contain member function and structure does not contain member function.