1. Difference between "C structure" and "C++ structure".2. Diffrence between a "assignment operator" and a "copy constructor"3. What is the difference between "overloading" and "overridding"?4. Explain the need for "Virtual Destructor".5. Can we have "Virtual Constructors"?6. What are the different types of polymorphism?7. What are Virtual Functions? How to implement virtual functions in "C"8. What...

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Answered by: Rajini

• Feb 19th, 2007

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Q. Difference between "C structure" and "C++ structure".
Ans:- C structure cannot have member functions but C++ structure can have. Also in a C structure by default all data members of structure are public and access cannot be changed by specifying the private or protected keywords but in C++ eventhough by default members are public we may change the access using the keywords private and protected.
Q. What is the difference between "overloading" and "overridding"?
ans:- Overloading is a process of having the same function name but different no of arguments or types of arguments within the same class but overriding means redefining a baseclass functions definition in the subclass.
Q. Explain the need for "Virtual Destructor".
Ans:=Virtual destructor ensures destruction of subclass and base class objects in proper order.
Q. What are the different types of polymorphism?
Ans:-Overloading and overriding.
Q. What are the different types of Storage classes?
ans:-Auto,Register,static and extern
Q. What is the difference between "calloc" and "malloc"?
Ans:- calloc and malloc are used for dynamic memory allocation. Calloc initializes the memory locations to zero by default but malloc memory contains garbage values.
Difference between "printf" and "sprintf".
printf will write to the console. sprintf will write to the buffer

suneel kumar alld

• Apr 2nd, 2016

Loop - Loop is a block of code that execute numbers of time until expression or statement return zero (0)

Shreya

• Feb 3rd, 2016

Namespace : It is a declarative region that provides scope to the identifiers inside it.

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1)Write a C program to find a peculiar two digit number which is three times the sum of its digits.2) Bacteria are known to multiply very rapidly. If a certain container contains just one bacterium on the first day and there are twice as many on the next day. In this manner the number of bacteria in the container doubles itself everyday. Assuming that the container would be full on the 10th day with...

Aneesh

• Jul 29th, 2016

27

Code
#include<stdio.h>
#include<conio.h>
"%d",i);
       }
     getch();
  }

Rohan

• Jun 18th, 2015

I dont know if its optimized but works"c {/*There are some goats and ducks in a farm. There are 60 eyes and 86 foot in total. Write a program to find number of goats and ducks...

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Shylendar

• Dec 26th, 2016

Simple Difference:
1. Inside the class you can write method()
2. Outside the class you can write function()
3. Function have return type.
4. Method don't have return type.

sandeep singh rawat

• Oct 13th, 2015

A function was used in C/C++. However with the Java the name "method" is used in place of function that is all.

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Yes. The const modifier means that this code cannot change the value of the variable, but that does not mean that the value cannot be changed by means outside this code. For instance, in the example in  FAQ 8, the timer structure was accessed through a volatile const pointer. The function itself did not change the value of the timer, so it was declared const. However, the value was changed by...

Ajay

• Apr 17th, 2017

Interrupt status register should be changed by the program. For example, if status register is updated by the hardware for some kind of interrupt. In our program we read the status register to service...

YanChenChi

 Profile Answers by YanChenChi Questions by YanChenChi

• Dec 9th, 2010

Const variable/objects are read only variable; it does not mean that it is stored in ROM(Read Only Memory).

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Int

prathmesh dhumal

• May 9th, 2017

Return type of printf is int

Code
span style="color: #339933;">#include<stdio.h>
#include<conio.h>
"%d""%s" , "welcome in c"));
getch();
}
output is 12

Anil kumar

• Jan 22nd, 2016

Return type of both of them is integer. Scanf returns how many things it has read while printf returns how many characters get printed.

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Write a program to find a number if even or odd with out using conditional operator and if-else?

Markandayan

• Sep 11th, 2017

By using bitwise opertor
(even_number & 1) -> 0
(odd_number & 1) -> 1

debakanta rout

• Apr 2nd, 2016

Int num
scanf("%d",&nnum);
char *p[2]={"even","odd"};
printf("%d" is %s",num, p[num&1]);

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What's the "condition" so that the following codesnippet prints both HelloWorld !if "condition"printf ("Hello");elseprintf("World");

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kiranb_rvce  

 Profile Answers by kiranb_rvce Questions by kiranb_rvce

• Member Since Jun-2008 | Jun 6th, 2008

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if ( ! ( printf("Hello ") ) )
printf("Hello");
else
printf("World");

Florian F

• Nov 17th, 2017

Condition can be empty

Code
#include <stdio.h>
#define printf(s) (!printf(s))
"Hello ""world!
");
}

fazil.vp

 Profile Answers by fazil.vp Questions by fazil.vp

• Apr 24th, 2009

/* Solution 1: */int main(int argc, char* argv[]){ if( argc == 2 || main( 2, NULL ) ) { printf("Hello "); } else { printf("Worldn"); } return 0;}/* Solution 2 (Only for Unix an...

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ARTI SHUKLA

• Aug 9th, 2018

Look the error for 1012....1019......2012......2019.....and so on, CORRECT IT SIR!

pankajgupta2828

 Profile Answers by pankajgupta2828 Questions by pankajgupta2828

• Aug 2nd, 2017

Please also suggest a code for generalized number i.e for any number at least till crores.

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Why does ++i * ++i give 49 when i=5?

Pujitha

• Jun 27th, 2019

I=5;
++i * ++i; (6*7)(if the i is the value 7)
7*7;
49

Ankush Batra

• Nov 1st, 2018

The ans is 49 only
bcoz i cant be 2 values(6, 7) at a time so, i should be 7 at last
thats why 7*7 = 49.

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Pujitha

• Jun 27th, 2019

We can use the conditional operator

RohitReddy

 Profile Answers by RohitReddy Questions by RohitReddy

• Mar 12th, 2018

You can use conditional operator like this,

String result = num % 2 == 0 ? "Even" : "Odd";

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if i enter an ID Number it should look in the .txt file the employee who owns that ID Number then it will display it on the screen..

Tanmay Hatkar

• Oct 8th, 2019

Can you please show me how to read a file until whitespace without using lib var type

jbode

 Profile Answers by jbode Questions by jbode

• Sep 13th, 2017

How is the file structured? Is it a text or binary file? Is it a flat file or a tree structure? Are the records fixed or variable length? Is there a delimiter between the ID and name? Are records in the file ordered by name or ID number?

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semayawi

• Nov 20th, 2019

#include < iostream > using namespace std; int main() { int a=5,c; c=++a + ++a + ++a; cout < < c; //first excretion a=5 and ++a means a+1= 5+1=6. // second excretion a=6 and ++a means a+1 = 6+1...

Rakesh

• Aug 18th, 2019

For c++14 it is 22, for A=5

Code
#include <iostream>

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Shikha chaudhary

• Jul 16th, 2020

This is the easiest way !!

Code
#include<stdio.h>
"enter the base number");
    scanf("%d""enter the exponent");
    scanf("%d""%d", ans);
}
 

Mukeshwar Singh

• Jun 22nd, 2019

Easy!

Code
#include <stdio.h>
#include <math.h>
"Enter two Numbers");
  scanf("%d%d""The Value of Number is %d"

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What is the answer of a++ + ++a + a++

int a=5;c = a++ + ++a + a++;//compiler produces the answer 28!!!//How

vishal

• Jun 2nd, 2022

19 is the correct answer here is my perfect code try and find it all other answers is incorrect

Code
#include <stdio.h>
"%d",c);
}
 

susruth

• Sep 25th, 2019

Code
#include<stdio.h>
"k= %d  a=%d
"

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