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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();
} -
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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What is static memory allocation and dynamic memory allocation?
Static memory allocation: The compiler allocates the required memory space for a declared variable.By using the address of operator,the reserved address is obtained and this address may be assigned to a pointer variable.Since most of the declared variable have static memory,this way of assigning pointer value to a pointer variable is known as static memory allocation. memory is assigned during...
Akanksha Suneri
- Apr 19th, 2015
An array created at compile time by specifying size in the source code has a fixed size and cannot be altered at run time. The process of allocationg memory at compile time is known as STATIC MEMORY A...
jbode
- Mar 24th, 2015
As of the 2011 standard (http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1570.pdf), C has four storage durations for objects: static, thread, automatic, and allocated (6.2,4 Storage Durations of obje...
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printf("%s", obj->pName);
}
">Struct Foo{ char *pName;};main(){ struct Foo *obj = malloc(sizeof(struct Foo)); clrscr(); strcpy(obj->pName,"Your Name"); printf("%s", obj->pName);}
A) NameB) compile errorC) Your NameD) Runtime error
kgupta11oct
- Jul 6th, 2011
Hi Everyone,It seems simple but tricky. by allocating memory of size struct Foo does not allocate memory if there is any pointer variable in structure itself.Please allocate memory to that varia...
yba
- Jul 10th, 2007
If we assume you have a compiler that isn't strictly enforcing Ansi-C, and you make it to having an executable, the interviewer probably wants you to realize why this code is in error.The call to ...
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Would the following program compile? main() { int a=10,*j; void *k; j=k=&a; j++; k++; printf("n%u%u",j,k); }
A) YesB) No
abhimanipal
- Jul 29th, 2009
Test.c:10: error: invalid conversion from `void*' to `int*'test.c:12: error: ISO C++ forbids incrementing a pointer of type `void*'
aniljoo
- Feb 12th, 2007
No it will not work
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}
change(int *b,int n)
{
int i;
for(i=0;i
}
sytaxis correct?? was asked i a test
">Output of this Programme please??main(){ int a[]={2,4,6,8,10}; int i;change(a,5);for(int i=0;i
chaitanya
- Oct 22nd, 2007
First lets get the code ryt..#include "stdio.h"void change(int *b,int n){? int i;? for(i=0;i
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How to write a C program to find the power of 2 in a normal way and in single step?
aravindkumarsingh
- Jun 4th, 2008
# include <stdio.h># include <conio.h>void main(){ int x; printf("Enter the value of x: "); scanf(" %d", &x); if((x & (x-1)) ==0) prin...
krisgroup
- Oct 22nd, 2007
Hi folks,I would say try this ...int result=!((input_no&&input_no-1)&&input_no)it works a good bit twidling technique,chaitanya
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FILE *fp;What is size of FILE data type???
kbjarnason
- Jul 7th, 2011
"If you look in stdio.h, you see..." - which stdio.h? The one from visual studio 95? gcc for Linux? Some other one? Those header files are not identical from im...
kgupta11oct
- Jul 7th, 2011
If you see the declaration of FILE in stdio.h:struct _iobuf { char *_ptr;int _cnt; char *_base;int _flag; int _file;int _charbuf; int _bufsiz;char *_tmpfname; };As there is no packing, the default wil...
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Printing numbers from 1 to 100 without using condition checking.
jose
- Oct 19th, 2006
Just came up with another solution. It is a 1-liner:cout
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Write a program to get the following output ..n should be entered by user...like when n=5 the output should be110101101010101
sivaraju.sateesh
- Jul 20th, 2010
#include<stdio.h>main(){int n,i=4,j;scanf("%d",&n);while(i<=n+3){for(j=3;j<i;j++){printf("%d",j%2);}printf("n");i++;}}
R.S.Jayasathyanarayanan
- Dec 17th, 2006
void main(){ int i,n; ...
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What is the difference between declaring a variable and defining a variable?
Declaring a variable means describing its type to the compiler but not allocating any space for it. Defining a variable means declaring it and also allocating space to hold the variable. You can also initialize a variable at the time it is defined.
anandkumarjha
- Aug 31st, 2010
As far as declaration of variable is concerned it only shows the properties of variable and we declare the data type which are to be used by that variable but when it comes to the definition of variab...
prabhu
- May 5th, 2007
Int num;This statement is declaration and also defination since it also allocates memory for variable num.But when you use following statementextern int num;It is only declaration since you are not allocating memory here.
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How size of structure can be calculated? What is byte alignment used while allocating memory for structure members.
prabhjots
- Feb 6th, 2008
hey first of all i got this as 26 (running on windows)..and the other thing you are asking about memory aligment is dat there are restrictions by some compilers(or by machines) that every int (or floa...
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}
">#define SQR(x) x * xmain(){ printf("%d", 225/SQR(15));}
A) 15B) 225C) 1D) none of the above
Sukumar Paul
- Jul 24th, 2010
Yes the answer will be 225/15*15. As / and * has the same precedednce and associativity is from left to right so it will give 225(225/15*15 => 15*15 => 225).
yba
- Jul 10th, 2007
In algebra * has higher precedence than /, but in C they have the same precedence, and are left-associative, meaning the operations are performed left to right.So 225 / 15 * 15 gives (225/15)*15 or 22...
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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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How, multidimensional array initilized dynaminically?
dasam
- Apr 2nd, 2007
A) int **array1 = (int **)malloc(nrows * sizeof(int *)); for(i = 0; i < nrows; i++) array1[i] = malloc(ncolumns * sizeof(int));b) int (*array4)[NCOLUMNS] = malloc(nrows * sizeof(*array4));c) int (*array5)[NROWS][NCOLUMNS] = malloc(sizeof(*array5));
Bond
- Feb 18th, 2007
#define ROW 5 //Some value#define COL 4 //Some valueint main(){ int **a; a = (int *)malloc(sizeof(i...
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Why does a character constant require two bytes of memory space in C programming
kbjarnason
- Jul 2nd, 2010
They don't.char a; - a is a char variable, which requires one byte's storage.'a' - 'a' is a character constant, which is of type _int_, which requires the same storage as...
abhimanipal
- Jul 15th, 2009
Int main(){ char c='A'; const char a= 'C'; printf("%dn",sizeof(c)); printf("%dn",sizeof(a)); return 0;}The output of this one is11
C Interview Questions
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