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For what purpose pragma.h header file is used?
dharmendra.roshan
- Apr 7th, 2008
The header files are used for various function used your C program like printf,scanf and various preprocessor activities during compilation.
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What is the preprocesser and why it need?What are the types in preprocessor?
pavan.mustyala
- Apr 9th, 2008
The C preprocessor implements the macro language used to transform C, C++, and Objective-C programs before they are compiled.Preprocessing is the first stage of program compillation where all MACROS a...
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">Vi) main(){ extern int i; i=20;printf("%d",i);}
Linker Error : Undefined symbol '_i'Explanation: extern storage class in the following declaration, extern int i;specifies to the compiler that the memory for i is allocated in some other program and that address will be given to the current program at the time of linking. But linker finds that no other variable of name i is available in any other program with...
ashoksurati
- Apr 11th, 2008
Extern is a kind of variable declaration,if we declare a variable as extern it can be accessable anywhere in the program.the accessing of the variable is doesn't depends on the scope.TahnkUAshok
pavan.mustyala
- Apr 11th, 2008
Extern is a key word in C that indicates the scope of a variable or function.This key word can be used with a variable when it is used across different files of a typical project.The variable is ...
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What are commandline arguements. Plz explain me in detail
ashoksurati
- Apr 12th, 2008
Arguments mean passing the values from calling function to the functiondefinition(called function).Those are user defind functions.If we want pass the arguments to main() funtion there only one way wh...
T.Raghavendra
- Nov 24th, 2006
command line aruments are nothing but passing the function arguments through command line. ex: $ program name argument1 argument2 main(int argc, char *argv[]) argc is t...
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What is meant by "contagious memory allocation"?
bairaviuthra
- Jun 19th, 2007
Contiguous memory is meant by continuous memory space in the available memory. so when we allocate a memory space contigously in our programming it is reffered to as contiguous memory allocation.
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">What will be the ouput of the following program.,if any error what is it.#includevoid main(){float x=90.5,y=5.0,z;z=x%y;printf("%f",z);}
ashoksurati
- Apr 11th, 2008
There are two errors in this program those are1) We should have include atleast one header file(stdio.h)2) It is not possible that" divison of float variables".
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How reliable are floating-point comparisons?
Floating-point numbers are the “black art” of computer programming. One reason why this is so is that there is no optimal way to represent an arbitrary number. The Institute of Electrical and Electronic Engineers (IEEE) has developed a standard for the representation of floating-point numbers, but you cannot guarantee that every machine you use will conform to the standard. Even if your machine does...
annusingh
- May 5th, 2008
A program running in the database that can take complex actions based on the inputs you send it. Using a stored procedure is faster than doing the same work on a client, because the program runs right inside the database server.
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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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What is the default argument and parameter for main?
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What is false about the following A compound statement is a.A set of simple statmentsb.Demarcated on either side by curly bracketsc.Can be used in place of simple statementd.A C function is not a compound statement.
C
priya
- Jun 20th, 2007
A compound statement is defined as:A set of statements enclosed in a set of braces is known as a block or a compound statement.
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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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Base class has some virtual method and derived class has a method with the same name. If we initialize the base class pointer with derived
Base class has some virtual method and derived class has a method with the same name. If we initialize the base class pointer with derived object,. calling of that virtual method will result in which method being called?
rimi.mnnit
- May 30th, 2008
Base class method ll b called.bcozwhen a function is made virtual,C++ determines which function to use at run time based on the type of the object pointed to by the base pointer,rather than type of pointer.
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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/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 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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How to remove duplicate elements from an array
rimi.mnnit
- May 31st, 2008
//simple BST program with little change#include#includestruct btree{??????? int data;??????? struct btree *lnode;??????? struct btree *rnode;};typedef struct btree *tree_pntr;type...
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Fflush() argument in ANSI C
Identify the correct argument for the function call fflush() in ANSI C:A)stdoutB)stdinC)stderrD)All the above
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What is a null macro? What is the differtents between a null pointer and a null macro? What is near, far and huge pointer? How many bytes are occupied by them? How would you obtain segment and offset addresses from a far address of a memory location?
vivianyang
- May 12th, 2008
A null pointer should not be confused with an uninitialized pointer: a null pointer is guaranteed to compare unequal to any valid pointer, whereas depending on the language and implementation an unini...
dasam
- Mar 31st, 2007
NULL MACRO : #define NULL 0NULL Pointer : int* ptr = NULL; //points to no whereuninitialised pointer : int* ptr; //points to anywhere
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Diffence arrays and pointers?
Ø Pointers are used to manipulate data using the address. Pointers use * operator to access the data pointed to by themØ Arrays use subscripted variables to access and manipulate data.Array variables can be equivalently written using pointer expression.
stshekhar
- Jun 9th, 2008
Arrays are constant pointer . that is we can not point array variable to another location but we can modifies the content of the array elemnt.Pointers can be pointed to any address of same type.(Untill it does not declare const explicitly).
Bobby
- Sep 14th, 2006
It is important when ever anyone asks uArray elements are always stored in contiguous memory locations.If they increment then they points to next of that array type ..But when a pointer incremented always points to the immediately next location of its typeBye,Prabhu
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