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Function pointer
What is function pointer in C program?
nivi.babuji
- Jun 18th, 2009
Each pointer will point to a data type like integer, float etc., similar to these pointers we can also have some special pointers that point to the memory location of the functions and these pointers are named as function pointers
prasad2315
- Aug 26th, 2008
Function pointer in concept same as interger pointer, char pointer.Functions also have address keeping this in mind function pointers can be defined as?variables, which point to the address of a function.
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Memory allocations of structure
What is the slack memory concept in allocation of structure memory?
mkulacz
- May 22nd, 2009
I think slack memory is the extra memory at the end of a structure which may go unused. It may also include unused memory within a struct. For example, if a struct includes a short and then an int, in...
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View Files
How to view files created by a C program in Windows mode?
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}
">Const int perplexed = 2;#define perplexed 3main(){ #ifdef perplexed #undef perplexed #define perplexed 4 #endif printf("%d",perplexed);}
A) none of the aboveB) 4C) 2D) 0
indira.moparthi
- Apr 19th, 2009
Perplexed is a const variable. In the # define we are?trying to?modify the value which leads to an error.
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Convert Binary Number to Octal
Write a C program to convert a binary number to its corresponding octal number.
kakiharanadh
- Apr 14th, 2009
#include<stdio.h>#include<conio.h>main(){ int i=12; void printoctal(int,int); printoctal(i,i); getch();}void printoc...
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What is max/min heap?
burogini.vinod
- Feb 7th, 2007
Minimum heap means to sort in heap there must be atleast two nodes and maximum heap means any number of nodes may be there...
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Funtion pointer
What is the purpose and use of function pointers?
deepakupreti
- Mar 30th, 2009
Function pointer holds the address of a function. Every function has a address. We can call the function by calling the function pointer.
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Following declarations are sameconst char *s; char const *s;
A) TrueB) False
mihir_void
- Mar 5th, 2009
No, the declarations are not same Let us take see each one of them1. const char *s; Here the char is constant hence const char *s="hello" ; //alloweds[3]='o' ;//error as char is constants="bye";//thi...
kiranck007
- Jan 27th, 2006
i am sorry....actually there is no difference b/w const char *s;andchar const *s;but there is a difference b/w above two and and the below oneThe first two are interchangeable; they declare a pointer ...
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Which of the following is invalida.a+=bb.a*=bc.a>>=bd.a**=b
C
poojadev
- Mar 3rd, 2009
C is invalid>> is an error here.It can be used with console input and console output but this left chevron operotor cannot be directly used to assign.
Ranjit
- Apr 25th, 2005
Option d is invalid
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> (i - (i -1))));
}
}
">Main(){ signed int bit=512, i=5; for(;i;i--) { printf("%dn", bit = (bit >> (i - (i -1)))); }}
A) 128, 64, 32, 16, 8B) 256, 128, 64, 32, 16C) 512, 256, 128, 64, 32D) 64, 32, 16, 8, 4
sittoop
- Feb 26th, 2009
Right shift a number by 1 is equivalent to division of that number by 2^1.
Right shift a number by 2 is equivalent to division of that number by 2^2.Applying that, the answer is 256, 128, 64, 32, 16(left shift is opposite ~ multiplication)satyam_un
- Mar 13th, 2006
Ans is Bbecause the will b terminated after i=0;bit>>(i-(i-1)))means first it assignsi=5.the first value for bit is512>>(5-(5-1))=512>>1=512/2/1=256
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How will you print % character?
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How to print all the combinations of a given integer
Suppose i have given like integer 123.....then print like all the combinations 111,112,113,121......up to 333..
bathesabari
- Feb 17th, 2009
/*to print possible patern using given no*/#include<stdio.h>#include<conio.h>void main(){ int a[100],b[100],n,x=1,y,k,j,i,m,c; clrscr(); printf("enter no of nost")...
ravi_529
- Dec 24th, 2007
int main(int argc,char* argv[]){int i,j,k;int n,r;int dig[3]; printf("enter any three dig numbern"); scanf("%d",&n); dig[2]=n%10; n=n/10; dig[1]=n%1...
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Strip Comments
Write a program to read a file, strip the comments and write the output to another file.
nemuns
- Feb 2nd, 2009
#include<stdio.h>#include<stdlib.h>#include<string.h>enum ParseState { INITIAL, ONE_SLASH_READ, TWO_SLASHES_READ, ONE_SLASH_STAR_READ...
dima2000star
- Sep 18th, 2008
{FILE *f, *of;f = fopen("c:/myprog1.cpp", "r"); of = fopen("c:/comments.cpp", "a");char* ch = new char[2]; *ch = fgetc(f);int l=0;while (!feof(f)) {if ((*ch == ...
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Find ASCII value.
How to find the ASCII value of an element ?
chandrikakr
- Aug 8th, 2008
try this code:#include<stdio.h>#include<conio.h>main(){ char a; clrscr(); puts("Enter a character:"); a=ge...
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Binary portability
What is code/binary portability?
crimola
- Jan 9th, 2009
Code portability is generally defined as C code (in the case of C) that adheres to the rules of the C standards and is Architecture (Pentium, PowerPC, MIPS, etc) as well as Platform (PC, Mac OS, Linux...
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C Interrupts
How are interrupts executed in C? Where are interrupts stored in the memory? What actually occurs when interrupts are encountered?
rkanna
- Dec 26th, 2008
When ever interrupt will occurs (ex: press keypoard or etc...) while excuting C programming the control stop execution and pushed current data in stack and switch to interrupt handler and then ca...
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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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Address bus
How will you design address bus?
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Consider the following program sigmentint n,sum=1;switch(n) {case 2:sum=sum+2;case 3:sum*=2;break;default:sum=0;} if n=2, what is the value of suma.0b.6c.3d.none
B
Bhoomika sharma
- Dec 21st, 2008
As we have n=2, thus control goes to case2: thus,value of sum becomes 3 and since there is no break stmt thus,sum is again found as (2*3)=6.Thus the value of sum is 6.
ab
- Sep 29th, 2006
Ans is d
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Difference between class and structure
Bhoomika sharma
- Dec 21st, 2008
We can list as:1. In classes the default scope is private whereas in structures u have public.equir2.Also, u can define the scope according to is requiremeuctunts in claasses.3. In classes u can creat...
lotus08
- Jun 27th, 2008
Structure is a collection of data and class is a collection of data and functions.by defalut struct is public whereas class is private
C Interview Questions
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