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What is a const pointer?
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Editorial / Best Answer
Answered by: Prasad
- Apr 27th, 2007
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
- Jan 7th, 2011
An ordinary pointer variable preceeded with the "const" modifier. This prevents the value initialised from getting changed.
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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How can you determine the maximum value that a numeric variable can hold?
For integral types, on a machine that uses two’s complement arithmetic (which is just about any machine you’re likely to use), a signed type can hold numbers from –2(number of bits – 1) to +2(number of bits – 1) – 1. An unsigned type can hold values from 0 to +2(number of bits) – 1. For instance, a 16-bit signed integer can hold numbers from –2^15 (–32768) to +2^15 – 1 (32767).
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What is false about the following -- A compound statement isA. A set of simple statementsB. Demarcated on either side by curly bracketsC. Can be used in place of simple statementD. A C function is not a compound statement.
Gayathri v
- Apr 24th, 2020
Here the false is asked.So the correct answer is option C
vishwanathpillay
- Dec 8th, 2009
Since we all know that --- A set of simple stmt is together called as a compound stmt. so A can't be false.Since a compound stmt is a set of siimple stmt, it can be used instead of simple stmt.A f...
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A=0;while(a<5)printf("%d\n", a++);How many times does the loop occurs?A. infiniteB. 5C. 4D. 6
K.k.s
- Aug 25th, 2018
Infinite
chandradeepika
- Jun 13th, 2008
Ans:A)infinite.Becoz a is initialized to 0 and it is not incremented.so the condition wont become false and so it will execute for infinite times.
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What would be the output of the following program? main() { int y=128; const int x=y; printf("%d",x); } a) 128 b) Garbage value c) Error d) 0
Ashok Kumar Orupalli
- Sep 4th, 2012
Answer is a)128. Here we are not modifying const value. We are just assigning value to const variable.
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main()
{
int i;
clrscr();
printf("%d", &i)+1;
scanf("%d", i)-1;
}
">Main() { int i; clrscr(); printf("%d", &i)+1; scanf("%d", i)-1; }
A) Runtime error. Access violationB) Compile error. Illegal syntaxC) None of the aboveD) Runtime errorExplanation: printf( ) prints address/garbage of i, scanf() dont have & sign, so scans address for i +1, -1 dont have any effect on code.
Ajay Kanse
- Dec 22nd, 2008
The printf will give some junk value (address) and scanf will wait for the input from user. once u enter a value u'll get Bus error(coredump).
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How will you print % character?
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}
">Main(){ printf("%d, %d", sizeof('c'), sizeof(100));}
A) 4, 100B) 2, 100C) 2, 2D) 4, 4
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Why don\'t we add null pointer at the end of array of integer?How can we calculate the length of array of integer?
poojayadav12
- Jul 28th, 2010
In case of array of characters we need a null pointer because after we get the output we press the enter key which takes 1 ASCII character value and as a result we need the null character.But in case ...
pratikgotal
- Apr 4th, 2010
No Ali null is not equal to '' it was nul. NULL is a macro defined in for the null pointer. NUL is the name of the first character in the ASCII character set. It corresponds to a zero value. There's n...
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How do i design an Algorithm to check if a number is an Armstrong number?
jbode
- Mar 7th, 2014
First, count up the number of digits in the candidate value; an easy way to do this is take the floor value of the log of the number and add 1 (for example, floor(log10(1234)) = 3, so 3 + 1 = 4 digits...
Kapil S Shinde
- Feb 25th, 2014
"c start Accept num noOfDigit=calculate number of digits //use counting digit function while(num!=0) { remainder=inum%10; sum=sum+pow(remainder,noOfDigit); //use power func...
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Fibbonaci series program
jintojos
- May 24th, 2008
// Fibnocci Series Using Recursion #include<stdio.h> #include<conio.h> void fun(int,int); int num; void main() { clrscr(); p...
jintojos
- May 24th, 2008
// Fibnocci Series Using Recursion #include #include void fun(int,int); int num; void main() { clrscr(); printf("Enter The Limit :"); scanf("%d",&num); printf("The Fibnocci Series Up To %d Is...
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How can you find the number of elements stored in a static array at a time?
fkhanoom
- Mar 19th, 2008
Array elements are stored in contiguous memory and arrays can hold elements of one type only. Therefore, nArrElmt = sizeof(arr)/sizeof(arr[0]);
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}">
Main(){ int i=1,j=1,k=0,l=1,m; m=++i && ++j && ++k || ++l; Printf("%d %d %d %d %d",i,j,k,l,m);}
jbode
- Feb 1st, 2011
Output will be 2 2 1 1 1.Both && and || force left-to-right evaluation; the LHS will be completely evaluated and all side effects applied before the RHS is evaluated. If the operator is ...
Tarkeshwar_Prasad
- Mar 16th, 2009
The answer will be i=2,j=2,k=1,l=1,m=1 The expression will be like this m=(++i&&++j)&&(++k||++l); First time i and j will be incremented that is (2,2) and logical AND(&&) condition will be performe...
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How can a character and a string with only one character can be differentiated? What is the internal difference between a character and string, with only one character in it?
kbjarnason
- Jul 2nd, 2010
Easy: they're different types.char s[] = "a";char c = 'a'';There are a few cases where this could be problematic. For example:void func( char *p ){ while ( ...
yrenster
- Feb 5th, 2008
A character is a interger in the range -127 to 127. You can set a char value using interger. for example, the character 'a': char cc = 141; The string "a" is not a integer, a string ...
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Swapping of two numbers
How to swap two numbers without using temporary variable?
mahamadalig
- May 7th, 2012
Code- #include<stdio.h>
- #include<conio.h>
- "BEFORE SWAPPPED
- ""%d,%d
- ""BEFORE SWAPPPED
- ""%d,%d
- ",i,j);
- }
Tanuja Jaiswal
- Jan 26th, 2012
#include
void main()
{
int a,b,temp;
printf("Enter values for a and b ");
scanf("%d %d",&a , &b);
printf("values before swaping are : %d %d",a,b);
temp=a;
a=b;
b=temp;
printf("After swaping values are : a= %d b=%d,a,b);
getch();
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Even or Odd number
Write a program to find a number if even or odd with out using conditional operator and if-else?
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Write the equivalent expression for x%8?
x&7 Write expressions to swap two integers without using a temporary variable?
C Interview Questions
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