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What are the advantages of auto variables?
1)The same auto variable name can be used in different blocks2)There is no side effect by changing the values in the blocks3)The memory is economically used 4)Auto variables have inherent protection because of local scope
plan_with.me
- Jan 27th, 2008
The main advantage of auto variable is if we use auto variable in different block of our code with different value then it has not any sideeffect because it is automatically managed by the compiler .
vinod
- Feb 22nd, 2007
Auto variable have initial value as garbage.auto int and int are one and the same.
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Explain C Code
#define sro(X) (X*X)main(){int i=3,j,k;j=sro(i++);k=sro(++i);printf("n%d %d",j,k);getch();}output is 9 49can any one explain why we get second output as 49
prabhjots
- Feb 6th, 2008
ya this is kind of weird problem dat u will always get with macros..wat happens is wen u write j= sro(i++) it gets expanded to (i++*i++)which assigns 9 to j. now since u r getting i++ twice it gets in...
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What is heap memory that is used to store global & static variables of C.
bismitapadhy
- Feb 16th, 2008
Global and static variable are stored in data segment.heap memory used for dynamic memory allocation.
Vishwas.p
- Feb 8th, 2008
Data - int char[]="hello".......constants not intiliazed to zero. BSS( Block started by symbol) - static int i....... all global and static variables stack - variables,...
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Write a program to find distinct word from a file
Write a program to find distinct word from file,and to check a particular word present or not in each line
stevenong2007
- Feb 20th, 2008
Here is how I would write this in C++.....Enjoy// // File: FindWordCPP.cc// Author: Steven Ong//// Created on February 19, 2008, 11:05 PM//#include <stdlib.h>#include <iostream>...
stevenong2007
- Feb 19th, 2008
The statements: if(c == 'r') ... should be .... if(c =='r')...And if(c == 'n') ... should be .... if(c =='n')For ...
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C Program for Combinations
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NCR function
Write a program in C which will print all the possible combination of a given word. E.G. if the word is ABCD then the output should be ABCD, ABDC, ACBD, ACDB, ADBC, ADCB, BACD, BADC, BCAD, BCDA, BDAC, BDCA, CABD, CADB, CBAD, CBDA, CDAB, CDBA, DABC, DACB, DBAC, DBCA, DCAB, DCBA,but the number of letters of the input must not be fixed i.e. the program should run well for any number of letters.
calvinss4
- Feb 28th, 2008
#include <stdio.h>#include <string.h>#include <assert.h>typedef unsigned int u32;#define SWAP(a, b) do { a ^= b; b ^= a; a ^= b; } while (0)u32 print_ctr;void PrintAllPerms(char *str...
michiw
- Feb 10th, 2008
#include <stdio.h>#include <stdlib.h>#include <string.h>void ncr(int preflen, char *prefix, int len, char *str) { if (len <= 1) { printf("%s%s, "...
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Explian Floyd Cycle finding algorithm for circular link list?
kundanthebest
- Mar 3rd, 2008
Simultaneously go through the list by ones (slow iterator) and by twos (fast iterator). If there is a loop the fast iterator will go around that loop twice as fast as the slow iterator. The fast itera...
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printf("Address of j=%un",&j);
printf("Address of k=%un",&k);
return 0;
}
Suppose the answer is:
Address of i=2004
Address of j=2002
Address of k=2000
why is the address decreasing ?">Consider the following program:#includemain(){int i=3;int *j;int **k;j=&i;k=&j;printf("Address of i=%un",&i);printf("Address of j=%un",&j);printf("Address of k=%un",&k);return 0;}Suppose the answer is:Address of i=2004Address of j=2002Address of k=2000why is the address decreasing ?
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Write a program to print an 2D array in spiral manner
amarendra.moharana
- Mar 13th, 2008
A[2][3]={1,2,3,4,5,6};for(i=0;i<2;i++){ for(j=0;j<3;j++) { printf("%d",A[i][j]); }/...
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Which statement is true? A. Functions are declared in header files B. Functions are defined in header files
pvsola
- Mar 15th, 2008
Both statements are true, functions can be declared and defined in header file, but not a good practice.
Vijay K
- Sep 5th, 2007
A. is true.void fun(int); -> This is declaring a function.void fun(int a) -> This is defining a function.{....}
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What is source code of this tringle A A N I A N I R B A N I R B A N A N I R B A N P A A N I R B A N P A U L 2) A N I R B A N P A 3) 1 2 3 4 5 6 7 8 9
jeyaraj.ck
- Mar 18th, 2008
#define MAX 12int main() {char name[MAX] = "Bangalor";int i,j,k,odd,h=0; for(k=0,i=0,odd=1; i<4; i++,k+=odd) {if(k!=0) odd+=2;for(j=k; (j<k+odd)&&(h<MAX);j++) {printf("%c ",name[j]); h++;}printf("Backslashn"); }getch();}// Backslash is
jeyaraj.ck
- Mar 18th, 2008
3)123456789#define MAX 9int main() {int int_array[MAX] = {1,2,3,4,5,6,7,8,9}; int i,j,k,odd,h=0; for(k=0,i=0,odd=1; i<3; i++,k+=odd) {if(k!=0) odd+=2;for(j=k; (j<k+odd)&&(h<MAX);j++) ...
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Garbage Value
What is garbage value and How it is stored?
sohotra
- Mar 18th, 2008
Garbage value is a value which is not useful to your program. Normally when you create a variable and don't initialize it, it has a garbage value which is left behind by another program at that memory address.
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How are pointer variables initialized?
Pointer variable are initialized by one of the following two waysØ Static memory allocation Ø Dynamic memory allocation
baseersd
- Mar 19th, 2008
Hope this may be the possible answer.#include<stdio.h>#define MAX 5int main(){ int p[] = {1,2,3,4,5};//Static initialization int *q = NULL; ...
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Pick out the odd one outA. malloc()B. calloc()C. free()D. realloc()
molakalapalli murali kris
- Mar 19th, 2008
Ya answer is FREE() bczmalloc() is used to allocate single block of memorycalloc() is used to allocate multible blocks of memoryrealloc() is used to reallocate the allocated memorybut free()is used to deallocate the memory
Nishi Rathore
- Sep 25th, 2007
Free() is odd because rest functions are used to allocate memory and free is used to deallocate the memory
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What would be the output of the following program? main() { const int x=5; int *ptrx; ptrx=&x; *ptrx=10; printf("%d",x); }
A) 5B) 10C) ErrorD) Garbage Value
fkhanoom
- Mar 19th, 2008
Remember that const variable in principle can not be changed. However, this may not be enforced with some compilers.If compiling with a C compiler, there is a warning, but the assignment discards qual...
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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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Write a program to generate any one number randomly from a list of numbers.
amitprasad
- Mar 21st, 2008
NitinMishra is absoulutely right that number generated by rand() is not random. I think this code will serve the purpose.....#include <stdio.h>#include <time.h>int main(){ ...
NitinMishra
- Nov 5th, 2007
#includemain(){int a=rand();printf("%d",a);}The above program creates random number but this program can better be modified by using seed() function i.e combination of rand() and seed().The number gen...
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Finding Two least number in array.
How to find the least two numbers in a single dimension array in a single pass (traversing the elements only once)
amitprasad
- Mar 21st, 2008
It is very simple man. Just do like taht.#define LEAST_COMPARE(index, least) list[index] < list[least]for (index = 0;index < 10;index++){ if (LEAST_COMPARE(index,least)) &...
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What is an lvalue?
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
- 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, *...
C Interview Questions
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