A pointer value is a data object that refers to a memory location. Each memory locaion is numbered in the memory.The number attached to a    memory location is called the address of the location.

subbu malepati

• Dec 3rd, 2006

Hi,int *ptr=123;so ptr is pointer varible. suppose the adress of ptr is 2002( Assume) AT this mem-locn: value 123 is saved.to access address use & operatorto access value at the address use * opertator.

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1) If either operand of an arithmetic operator is unsigned long, the other operand is promoted to unsigned long. 2) If either operand of an arithmetic operator is unsigned int, the other operand is promoted to unsigned int. 3) If either operand of an arithmetic operator is int, the other operand is promoted to int. 4) If either operand of an arithmetic operator is double, the other operand...

ykbharat

 Profile Answers by ykbharat Questions by ykbharat

• Mar 20th, 2007

Here we cant say the default promotion without knowing the other operand.But if two operands are of different datatypes and the arithmetic operation is performed on these operands the compiler allocat...

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0 0 1 3 1Explanation :Logical operations always give a result of 1 or 0 . And also the logical AND (&&) operator has higher priority over the logical OR (||) operator. So the expression ‘i++ && j++ && k++’ is executed first. The result of this expression is 0 (-1 && -1 && 0 = 0). Now the expression is 0 || 2 which evaluates to 1 (because OR operator always gives 1 except for ‘0 || 0’ combination-...

abhimanipal

 Profile Answers by abhimanipal Questions by abhimanipal

• Jan 30th, 2010

Although the answer posted above is correct. There is one mistake in the explanation. Beena says that && operator has higher precedence tha || operator so && is evaluated first. But in...

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manohar

• Jan 3rd, 2007

Dangling pointer is a pointer which is pointing to the destroyed object or which does not have proper address. A pointer should be intialized to zero once it is freed after allocating memory to that ...

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zoyarasul

 Profile Answers by zoyarasul Questions by zoyarasul

• Jul 17th, 2008

#include<stdio.h>#include<stdlib.h>#include<conio.h>#include<graphics.h>#include<dos.h>#include<alloc.h>#include<process.h>union REGS in,out;void *buf;int siz...

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....and find the minimum number of notes to form that amount.
The denominations are 500,100,50,20,10,5,2,1 Rupee.

using any loop!!

Bincy Roy

• Jul 31st, 2012

"c #include int main(){ int amount,no_hun,no_fifty,no_ten,no_five,no_two,no_one,total_notes; printf(" Enter the amount: "); scanf("%d",&amount); no_hun=amount/100; amount=amoun...

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When reallocating memory if any other pointers point into same piece of memory do you have to readjust these pointers or do they get readjusted automatically?

abhimanipal

 Profile Answers by abhimanipal Questions by abhimanipal

• Jul 4th, 2009

If any pointers are pointing to the old memory location they have to be adjusted. C won't do it for you

alokag

 Profile Answers by alokag Questions by alokag

• Jun 25th, 2009

While reallocating, there is no readjustments. The OS will just search for the required memory block(not in use) & if available pass its pointer to the user.Nb: It CAN be the same pointer you have before reallocation.

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How to return multiple values in C language function?

Arpita Mishra

• Aug 4th, 2012

Multiple values can be returned from a function by using call by address i.e. pointers intelligently.

jbode

 Profile Answers by jbode Questions by jbode

• Jan 3rd, 2012

Strictly speaking, a C function can only *return* a single value; you cant write something like "a,b,c=f();". However, you can write to multiple function parameters in addition to returning a value (...

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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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dasam

 Profile Answers by dasam Questions by dasam

• Mar 31st, 2007

We can do __attribute__((packed)) but be careful the code is not portable to some operating systems.

dasam

 Profile Answers by dasam Questions by dasam

• Mar 31st, 2007

Structure padding problem can be avoided by using __atribute__((packed)) after each element in the structure.

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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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Answered by: Prasad

• Apr 27th, 2007

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Constant pointer is NOT pointer to constant. Constant pointer means the pointer is constant. For eg:
Constant Pointer
int * const ptr2 indicates that? ptr2 is a pointer which is constant. This means that ptr2 cannot be made to point to another integer. However the integer pointed by ptr2 can be changed.



Where as a Pointer to constant is
const int * ptr1 indicates that ptr1 is a pointer that points to a constant integer. The integer is constant and cannot be changed. However, the pointer ptr1 can be made to point to some other integer.

Jegan Chakkravarthy

 Profile Answers by Jegan Chakkravarthy Questions by Jegan Chakkravarthy

• Jan 7th, 2011

An ordinary pointer variable preceeded with the "const" modifier. This prevents the value initialised from getting changed.

anandkumarjha

 Profile Answers by anandkumarjha Questions by anandkumarjha

• Aug 29th, 2010

Absolutely there is the vast difference between constant pointer and the pointer to a constant.it will be more clear with the examples of both the types.CONSTANT POINTER:-int const *a...this means the...

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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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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 C program using arrays to count the numbers of positive and negative numbers which accepts the inputs as "size of the array" & "elements of the array" and outputs as "number of negative numbers in an array are" & "numbers of positive numbers in an array are" ?

shweta gupta

 Profile Answers by shweta gupta Questions by shweta gupta

• Jun 25th, 2014

Code
#include<iostream>
#include<stdio.h>
"enter the size of array""enter element of a["<<i<<"]=""total negative numbers "<<count_neg<<" and positive number is "

asdasda

• Aug 11th, 2013

Code
#include<conio.h>
#include<iostream>
"How many values: ""Enter value "<<a<<": "

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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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Akanksha Suneri

 Profile Answers by Akanksha Suneri Questions by Akanksha Suneri

• Apr 19th, 2015

Goto is the answer.

Bayapu

• Mar 10th, 2015

Goto is the answer, it can simulate break.

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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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An lvalue is an expression to which a value can be assigned. The lvalue expression is located on the left side of an assignment statement, whereas an rvalue is located on the right side of an assignment statement. Each assignment statement must have an lvalue and an rvalue. The lvalue expression must reference a storable variable in memory. It cannot be a constant.  

ashoksurati

 Profile Answers by ashoksurati Questions by ashoksurati

• Apr 5th, 2008

Lvalue is is a memory location,whose value is not constant i.e it's value is changed when a new value entered into that location.And also it can be say as, it is an expression,where  left side we have an identifier and right side(rvalue) the value.

rupa

• Nov 1st, 2007

lvalue is an expression which refers to the memory location where the variable is stored..eg -           int * E = 5;      here, *...

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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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