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What is the relation between array name and an element number.
jintojos
- Jun 9th, 2008
Array name is the base address of the aaray. By using this base address we can refer to the array elements. that is a[0] means "base address + 0th" element. that is array element number is the distence from the base address to the specified data
Joe
- Nov 20th, 2007
The relationship between an array element and the elements index number is as follows. 1. The array name by itself is a constant pointer to the first element of the a...
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Short int and int
What is the difference between short int and int?
jbode
- Feb 11th, 2012
The general idea is that short "always" represents a 16-bit integer, whereas int represents whatever the native word size is for that particular architecture (16- or 32-bit). "Always" is in scare quo...
sumit
- Feb 6th, 2012
Sorry to say that actually in most of C compiler short int is also of 16 bit and they are equivalent to each other.
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What's the best way to declare and define global variables
What's the best way to declare and define global variables and functions?
kbjarnason
- Jul 1st, 2010
The best way to declare and define global variables is to fix your code so you're not using them.The second best way is to determine whether you mean "file scope" - "global" bu...
rks_147
- Jun 20th, 2008
Best Way to represent a variable as global is , Just define the variable at the initial or just below the headers files ...
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Does ++p faster than p++?
kbjarnason
- Jul 1st, 2010
The correct answer is that the language does not define the performance of such operations; how they are implemented, how they are optimized and whether one is faster than the other are implementation-specific details, which may very well change, even radically, from one implementation to the next.
sandyseaweed
- Nov 7th, 2008
speed is the same. int iSpeedTest = i++;00413773 mov eax,dword ptr [ebp-0Ch] 00413776 mov dword ptr [ebp-150h],eax 0...
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Double Pointer
What is a Double Pointer? What are its specific uses.
jbode
- Oct 10th, 2011
By double pointers I assume you're talking about something like **ptr, as opposed to a simple pointer to a double object. Multiple levels of indirection show up in the following areas: 1. You want ...
garima
- Oct 6th, 2011
Double pointers are useful whenever you have defined user defined pointers in your main function. And you want to change their values from outside the main like in functions other than main. There the use of pointers is must.
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Execute C Program
How will you execute a file from another C program through C programming without system command?
yassiguy
- May 26th, 2010
We can store a shell code in another file. The shell code will spawn the new program. We can invoke the shell code from the parent program by reading it into memory and typecast the starting address to a function pointer and then invoking it.
rohitpant27
- Mar 27th, 2010
It can be included simply by:include "filename"only one file should contain the main() function.
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Return Multiple Values from Function
How to return multiple values in C language function?
Arpita Mishra
- Aug 4th, 2012
Multiple values can be returned from a function by using call by address i.e. pointers intelligently.
jbode
- Jan 3rd, 2012
Strictly speaking, a C function can only *return* a single value; you cant write something like "a,b,c=f();". However, you can write to multiple function parameters in addition to returning a value (...
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Pointers
Why do we need different types of pointers when it occupies the same memory space for any type of pointers?
supriti.dan
- Nov 30th, 2010
Pointer is a special kind of variable which can hold the address of other variable. As the address of any variable is a integer that's why pointer variable itself is always of integer type but in ...
mohamr2
- Sep 20th, 2010
Its not that we require different pointer, actually pointer are of the same size depending on the target platform that the memory belongs to. It is the pointer type that matters, we require an in...
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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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Reverse String Stored in Pointer Array
Write a C program to reverse the strings stored in the following array of pointers to strings char *s[]={"To err is human..", "But to really mess things up", "One needs to learn C!!" };
rocking.piyush
- Feb 22nd, 2011
#include <stdio.h>#include <string.h>void reverse (char *);main(){ char *s[] = { "To err is human...", "But to...
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Convert Integer to String
How will you convert an integer to a string without using itoa() function?
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Print colors with printf
Is it possible to print colors with printf statements ?
Prashant Shetty
- Aug 17th, 2012
Include conio.h header file and textcolor(int value) function and dont forget to use cprintf statement : ex:
now hello world will be displayed in yellow colorCode- span style="color: #ff0000;">"hell world");
jbode
- Jun 4th, 2012
Not directly. The printf function simply sends formatted text to the output stream. However, with some terminals, you can send control codes as part of the formatted text, and these control codes ca...
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What is the relationship between array name and pointer in C ?
Abhishek Mane
- Nov 23rd, 2018
Int *ptr; int arr[4]={1,2,3,4}; Pointer always points to the Base address of the array *(ptr+1) == arr[1] *(ptr+2) == arr[2] *(ptr+3) == arr[3]
Codejbode
- May 12th, 2017
Unless it is the operand of the "sizeof" or unary "&" operators, or is a string literal used to initialize another array in a declaration, an *expression* of type "N-element array of T" will be conver...
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Write a function reverse which takes a strings as a parameter and prints it out in reverse.
Example:reverse (hello) prints out (olleh)
Output of ++i + ++i + i + --i?
What will be the output of ++i + ++i + i + --i when i=5?
Compiler says output is 27. How?What is the benefit of using const for declaring constants?
The benefit of using the const keyword is that the compiler might be able to make optimizations based on the knowledge that the value of the variable will not change. In addition, the compiler will try to ensure that the values won’t be changed inadvertently. Of course, the same benefits apply to #defined constants. The reason to use const rather than #define to define a constant is that a const variable...
hurdjg
- May 30th, 2007
A side effect benefit:Say you want to pass an argument that you do not want modified, but you do not want to pass by value.Solution pass as constant reference or pointer constant...
hurdjg
- May 30th, 2007
A side effect benefit:Say you want to pass an argument that you do not want modified, but you do not want to pass by value.Solution pass as constant reference or pointer constant...
Are pointers integers?
No, pointers are not integers.A pointer is an address.It is merely a positive number and not an integer.
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.
Which of the following about automatic variables within a function is correct ?a.its type must be declared before using the variableb.they are localc.they are not initialised to zerod.they are global.
C
harinisathiyamurthy
- Oct 1st, 2007
AUTOMATIC VARIABLES ARE ALWAYS DECLARED WITHIN A FUNCTION.. SO THEY A LOCAL...
piyush
- Sep 25th, 2007
The answer is option B.As automatic variables are local only to the scope in which it is declared.
Ans