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What do you mean by preprocessor directory
abhimanipal
- Jan 17th, 2010
I think the question should be what is a pre processor directive ?As of my knowledge there is no such thing as pre processor directory
purankkoul
- Apr 16th, 2008
I think it is the directory where header files are keptin turbo c it is include folderpuran
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Why scanf("%d",&n) and gets(string) don't work together?
kbjarnason
- Jul 2nd, 2010
The solution is *NOT*, as another writer posted, to use fflush(stdin), because fflush is defined only for *output* streams, and stdin is not an output stream. Yes, your implementation may suppor...
baseersd
- Sep 18th, 2007
This is a general problem of the keyboard buffer. When scanf("%d",&n); is used and when an input is entered, the newline character("n") along with the input is stored in buffer...
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}">
Union u{ struct st { int i : 4; int j : 4; int k : 4; int l; }st; int i;}u;main(){ u.i = 100; printf("%d, %d, %d",u.i, u.st.i, u.st.l);}
100,4,0
shiva
- Sep 27th, 2011
U.i=100 // initialized in main i.e 100
u.s.j=4 // initialized in struct i.e 4
u.s.l=0 // not initialized so default os struct i.e 0 -
What is base address? How is it associated differentiantly for one dimentional and 2 dimentional array?
kbjarnason
- Jul 2nd, 2010
Note that C does not have two-dimensional arrays; it has arrays of arrays.char a[10][20];This is not a two-dimensional array; it is an array (with 10 elements) of arrays (each with 20 elements).In the...
jaydev
- Nov 19th, 2007
Base address is a actualy address of 0th element of an array and in two dimanstionarray it will 0(zero)th row and 0(zero)th coloum of array.
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What Ithe difference between a end of line and EOF while giving the inputs during run time?
pawandeep
- Mar 24th, 2012
End of file is a function which returns zero value at end of file... EOF is a deliminator
baseersd
- Nov 19th, 2007
End of Line refers to the 'n'( new line character). It will perform operations till it come across 'n'. EOF refers to End of File. It is the last character in the file.(if it is not empty). If the file is empty then only EOF will be present.Some compilers give its value as -1.
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What is the output ?
Main(){printf("""ramabrahmam"");}
tanweer.1484
- May 31st, 2008
The program gives compilation error.the reason for compilation error is the string is not terminated properly .the compiler is expecting a more quote from the user and throws the error.
sarathi trichy
- Nov 29th, 2007
Its errorthree double codes startded then three double codes are finished otherwise its error;(equal no of opens and closes are must)
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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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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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C Structures
Is structure a value type or a reference type? why?
baseersd
- Jan 24th, 2008
Hi Ujvala,I am little bit confused with the question, Are you asking like1)Calling the function with structure as a parameter, whether changes value of structure or not2)Passing of structure can...
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String Storing
How we can store more than 128chars in char-variable.
aman15490
- May 20th, 2008
simply by making it as unsigned char so the the last bit which is sign bit will be used to store a number now thus range becomes 0-255.
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Based on type conversion
Main(){ printf("%d",(2.5*2.5));}above gives output of 0 plss explain
kernel32
- May 22nd, 2008
Agreed except that we loose 6 bytes, rather we can say sizeof(double) - sizeof(int). As in case of linux we loose 4 bytes as sizeof(int) == 4 bytes
sachinpatil
- Feb 14th, 2008
by default the real number constants (i.e. 2.5 3.14 etc) are considered as double. Double is stored using IEEE floating point standard. the (2.5 *2.5) gives double. when this double is passed to ...
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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;} -
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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C/C++ Error Codes
what are the different types of errors observed in C and classify them as compile time or run-time errors.
divyavenki
- May 22nd, 2008
Compiler time error- the errors that compiler identifies like syntax error, type mismatch/ type casting errors.Runtime error- those errors that occur while executing a program like semantic errors, for eg, logical errors, stack overflow- , segmentation fault.
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How do you decide which integer type to use?
kbjarnason
- Jul 2nd, 2010
The first consideration is the range of values to be stored. If they're beyond the minimum required range of, say, an int, then you can't use an int - use a long (or long long, or other ...
dattatray shinde
- Jun 21st, 2008
Its depends on data which your using.suppose you want to store the age then CHAR age is useful.
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Do while() & while()
What is the minimum execution of do while() and while()?if there is a change why is it so?
kaivalya1989
- Jul 12th, 2008
while :it checks the neccessary condition before the exexution of loopif the condition=true then loop is executed and after one loop again the condition is checked and if true loop is again executed.....
sivarama vinaykumar
- Jun 29th, 2008
while is entry control statement which checks the condition before the compiler executes the statements in the loop.so the minimum execution of while is '0'. do while is a exit control s...
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Using any bit operation how can a binary number be checked whether it is even or odd?
maddynator
- Dec 24th, 2010
Take one's compliment of the number and then mod by 2.num = ~num;if (num%2 == 0) {num is odd;else?num is even;if you can ONLY use one bit operation, then AND with 0000 0001 is also good.
donofdons
- Oct 8th, 2010
Do "And" operation between the given number and "0000 0001", if the result is 1, then the given number is odd, otherwise even.
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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 == ...
C Interview Questions
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