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What is true about the followingC Functionsa.Need not return any valueb.Should always return an integerc.Should always return a floatd.Should always return more than one value.
D
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What is the type of the variable b in the following declaration?#define FLOATPTR float*FLOATPTR a,b;a) float b) float pointer c) int d) int pointer
Choose the correct option
Sonali Sadhukhan
- Jun 18th, 2011
It should be int as any pointer is of type int.Though it will point to an element of type float...
Rohit Kumar Sharma
- Oct 11th, 2006
Fine that is correct.many commit mistake here carelessly.
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A switch statement cannot includea) constants as arguments b) constant expression as argumentsc) string as an argument d) None of the above
Choose the correct option
Sonali Sadhukhan
- Jun 18th, 2011
I think b is the option because conditions are not checked in switch().
paulson paul chambakottukudyil
- Apr 20th, 2006
C only.
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What is the advantage of using the statement i++ instead of using i = i+1?
_jawahir_
- Jun 17th, 2011
This is a shorthand method used commonly in programming languages for reducing codes and efforts.....there is more shorthand methods are there... some of them are..(i=i+1) = (i++)(i=i-1) ...
jbode
- Feb 1st, 2011
Less typing. There's no guarantee that the statement "i++;" would execute any faster than "i = i + 1;" -- a reasonably smart compiler such as gcc will recognize that...
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How to write a program which prints its own source code as output?
_jawahir_
- Jun 17th, 2011
//***************jawahir007***************//#include<stdio.h>#include<conio.h>void main(int argc, char *argv[]){ char ch,*f,i; FILE *fp; clrscr(); for(i=0;argv[0][i]!='...
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Output of the following programvoid main(){unsigned i;i=100*400;printf(\
brijux
- Jul 1st, 2008
The integer size on 16 bit machine is 2 bytes.2 bytes = 16 bits.2^16 = 65536So for unsigned int range is 0 to 65536for signed int, range is -32768 to 32767And here unsigned int is used, and 40000 is within range, so it will print 40000 without any error.(Provided that the code is complete :) )
santhoshkumar
- Oct 7th, 2006
tes sucheta you r absolutely righteven unsigned never takes -ve values and it doubles the memory by adding the whole memory capacity
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Fix Function
Write the implementation of Fix function? fix(2.5) = 2 and fix(-2.25) = -3, this is the expected result. Write the code to implement this behaviour?
HariGM
- Aug 3rd, 2010
void fix(float a){float i=0;pid_t=pid;i=a; if (i>0){ printf("Fixed Value :%d n", (int)i);}else if (i<0){ printf("Fixed Value :%dn", (int)--i);}
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What is the size of int in C or C++?Answer:1) 2 byte2) system dependend3) compiler dependend
jbode
- Jul 6th, 2010
Per the C standard, an int must be able to represent at least values the range -32,767 to 32,767 (5.2.4.2.1), so an int must be at least 16 bits wide; however, it may be (and on some popular desk...
kbjarnason
- Jul 2nd, 2010
The correct answer is actually a little bit of 2 and a little bit of 3.For example, an int has a _required_ minimum range of -32767 to 32767; this means it has to be at least 16 bits wide, even if the...
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}
If any difference then Why it is difference?
">What will be the output of the following program in UNIX OS with CC compiler and TC compiler?int main(){ int i=5; printf("\n%d",++i + ++i + ++i + ++i + ++i );} If any difference then Why it is difference?
jainrahul399
- Jun 3rd, 2011
50 "bcoz i increment first to last and than i get value 10 and put and add than we get 50"
paragmalshe
- May 29th, 2008
Undefined behavioroutput may vary from compiler to compilervalue of a variable is getting modified more than once between 2 sequence pointshttp://en.wikipedia.org/wiki/Sequence_point
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Write one statement equivalent to the following two statementsx=sqr(a);return(x);Choose from one of the alternativesa.return(sqr(a));b.printf("sqr(a)");c.return(a*a*a);d.printf("%d",sqr(a));
D
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How to call C++ code from C ?
How can I call my C++ code from C code can you point me to some examples that are explained in detail.ThanksAjit
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C program to find 2 Digit Number
Write a program in C to find the 2 digit number which is 3 times its sum of its digits.
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Editorial / Best Answer
Piyush Dixit- Member Since Sep-2009 | Sep 18th, 2009
main()
{
int num,sum,i;
for(num=10;num<100;num++)
{
if(num==3*(num%10+num/10))
{
printf("%d",num);
}
}
}rahulshrimali
- Mar 3rd, 2011
#include<stdio.h>#include<conio.h>void main(){ int i,j,k,l; clrscr(); for(i=0;i<10;i++) { for(j=0;j<10;j++) { k = (i+j)*3; l = 10*i + j; if(k != 0 && l !=0) { if(k == l) printf("%dn",l); } } }getch();}
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Array is an lvalue or not?
An lvalue was defined as an expression to which a value can be assigned. Is an array an expression to which we can assign a value? The answer to this question is no, because an array is composed of several separate array elements that cannot be treated as a whole for assignment purposes. The following statement is therefore illegal: int x[5], y[5]; x = y; Additionally, you might want to copy the whole...
adarshjoshi
- May 12th, 2011
An object is a region of storage that can be examined and stored into. An lvalue is an expression that refers to such an object. An lvalue does not necessarily permit modification ...
jbode
- Nov 30th, 2010
Per the C Language Standard (hoping the posting software doesn't munge the following so that it's completely unreadable): ---------------------6.3.2.1 Lvalues, arrays, and function desig...
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What is the easiest searching method to use?
Just as qsort() was the easiest sorting method, because it is part of the standard library, bsearch() is the easiest searching method to use. If the given array is in the sorted order bsearch() is the best method. Following is the prototype for bsearch(): void *bsearch(const void *key, const void *buf, size_t num, size_t size, int (*comp)(const void *, const void*)); Another simple searching...
Manan Jadhav
- May 4th, 2011
binary search is the most easiest and efficient search algorithm to use.... pseudocode is:(this one is the recursive approach): BinarySearch(A[0..N-1], value, low, high) { if (hig...
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Is it better to use a macro or a function?
The answer depends on the situation you are writing code for. Macros have the distinct advantage of being more efficient (and faster) than functions, because their corresponding code is inserted directly into your source code at the point where the macro is called. There is no overhead involved in using a macro like there is in placing a call to a function. However, macros are generally small and...
Manan Jadhav
- May 4th, 2011
macros are usually preferred when the code is very small... They are usually faster as compared to the functions as the code itself is expanded in the original code where as for function there is a co...
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Sequence of Function Execution
printf("%d%d",f1(),f2());What is the sequence of function execution of the above statement. 1. printf, f1(), f2()2. printf, f2(), f1()3. f1(), f2(), printf4. f2(), f1(), printf.
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Editorial / Best Answer
mohinuddinkhan- Member Since Oct-2009 | Oct 30th, 2009
Let's understand this by going through the following code
#include<stdio.h>
int f1();
int f2();
void main()
{
printf("%dt%d",f1(),f2());
}int f1()
{
printf("f1() enteredn");
return 4;
}
int f2()
{
printf("f2() enteredn");
return 5;
}
O/P-
f2() entered
f1() entered
4 5
we can conclude f2() is 1st executed
then f1() and in the end printf().hence we can say the precedence of execution of functions are from right to left.geek Jack
- Aug 2nd, 2010
printf();then f2()then f1()then again printf() to print the value in f1 f2 these are arguments to printf function.
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C Library Functions
Which function in C library helps to sort the elements in an array quickly?
maverick23
- Mar 19th, 2011
qsort (void *array, size_t count, size_t size, comparison_fn_t compare)this function is declared in stdlib.h
maverick23
- Mar 19th, 2011
There is only one sort function in c library (stdlib.h) called as "qsort()"
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Recursive Function
1. Find output for following recursive function :int main(){int i=32242,j=find(i);}int find(int j){if(j){j = j%10 + find(j/10);printf(" %d ",j);}return j;}
2. What is the problem with following code : char* AddnewlinetoString(char *s){char buffer[1024];strcpy(buffer,s);buffer[strlen(s)-1] = 'n';return buffer;} -
Source Code Output
Write a program which produces its own source code as its output?
abhishekagarwal5110
- Feb 24th, 2011
//File should be save as abhishek.cpp#include #includemain(int arg, char *arr[]){ FILE *pFile; clrscr(); int c; pFile=fopen ("abhishek.cpp","r"); if (pFile==NULL) perror ("Error opening file");...
abhishekagarwal5110
- Feb 24th, 2011
#include #includemain(int arg, char *arr[]){ FILE *pFile; clrscr(); int c; pFile=fopen ("abhishek.cpp","r"); if (pFile==NULL) perror ("Error opening file"); else { do { c = getc (pFile); printf("%c",c); } while (c != EOF); fclose (pFile); } getch();return 0;}
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How do we get Square root of any number Without using sqrt() fuction?
Divick Kishore
- Feb 25th, 2011
A better approach would be to use newton raphson method. An equivalent python program would be written as:import sysimport osi = 0def sqrt_p(num, prev_sqrt): global i i += 1 if ( i > 5 ): return c...
R.S.Jayasathyanarayanan
- Dec 17th, 2006
#include main(){int a=5;int b=a^(.5)tf("%d", b);}
C Interview Questions
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Ans