GeeksforGeeks

Can pure virtual functions have a body?

Can constructors be overloaded? If no,how to prove it?

Why static data members cannot be initialised by initialiser list but can be initialised in the body of constructor?

Why static member functions cannot work upon non-static data members?
It should work when it is called with the object name.

could you or anyone else xplain the output to me for the code as follows -:

int a,b,c;
a=0;
b=0;
c=(a++)+(++a)+(++a);
printf("a=%d\n",a);
printf("b=%d\n",b);
printf("c=%d\n",c);

I felt the output should be a=3,b=0,c=5..
however correct output is
a=3
b=0
c=4

guys.....could you please help me with the concept of preincrement and post-increment i.e
[b]++a[/b] and [b]a++[/b].......
I always end up having a doubt in this case ??
thank you ......

can a constructor be private in c++

Can we override or overload a static member function at any point of time?

You may know its algorithm.. :) But code required (A Bit stupid point :D :D ) !!!
But still it is good one :) :)

Given 2 trees A and B find if tree B is a subtree of Tree A or not. Provide the most optimized solution that you can think of.

void main(){
static char s[]="Hi Goodie";
int i=4;char ch;
ch=s[i++];printf("\t %c",ch);ch=++i[s];printf("\t %c",ch);
ch=++i[s];printf("\t %c",ch);ch=i++[s];printf("\t %c",ch);
ch=s[++i];printf("\t %c",ch);ch=i[s]++;printf("\t %c",ch);}

I have problem in this program please HELP me

#include<iostream.h>
#include<conio.h>
#include<stdlib.h>
class myclass
{
	int x,y,z;
	public:
	myclass()
	{
		x=y=z=0;
		cout<<"Default constructor\n";
	}
	myclass(int a,int b,int c)
	{
		x=a;y=b;z=c;
		cout<<"Parameterized constructor\n";
	}
	~myclass()
	{
		cout<<"Default Destructor\n";
	}
	void *operator new(size_t s)
	{
		void *p;
		p=malloc(s);
		cout<<"Memory Allocated\n";
		return p;
	}
	...

unsigned int a, b, c;
/* a and b are assume to have some values */
c = (a + b) / 2; // <- There is a bug in this st
What is the bug? and how you debug it?

int a[1],b[1];
a[0]=1;
b[0]=2;
b[1]=4;
int *num1;
num1 = &b[0];
a[1]= static_cast<int>(*(num1));
cout<<a[0]<<endl<<a[1]<<endl<<b[0]<<endl<<b[1];

Can somebody put more flash on Heaps used for Dynamic memory allocation. I want know what exactly happens on the front of Operating Systems side.
For e.g: we say when we do malloc or new, we get memory block from heap and then we can use that much memory in our program.

What kind of heap is this ? (Min heap/max heap/ fibonacci heap ??)
How OS decides which memory block to give it to program ?
How does heap overcome memory fragmentation issues ?

Any answer, sugg...

Print 1 to n without using looping statement or recursion!

Under which conditions the default assignment operator is not generated by the compiler for your class? (assuming that you do not declare the assignment operator yourself)