kbjarnason

 Profile Answers by kbjarnason Questions by kbjarnason

• Jul 2nd, 2010

There is no reliable way to do this in C.First, if you use the conventional form of main - int main(int argc, char *argv[] ) - then argv[0] is supposed to hold the "program name" - but this ...

umeshknair

 Profile Answers by umeshknair Questions by umeshknair

• Sep 21st, 2006

include <dos.h>include <stdio.h>int main(int cnt, char **vec){ remove(vec[0]); return 0;}-dot-

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Swati

• Jan 8th, 2007

bool StrtoHex(const char* str){//If string is emptyif(str == NULL)return false;//Variable to indicate number is positive or negative. Default is positive bool isNeg = false;//Index of stringint index ...

Preetham

• Sep 26th, 2006

Use %x as format specifier while printing, the characters of string, u will get the result in hexadecimal

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mekala

• Jan 5th, 2007

    #include<stdio.h>int main(){char ch;int i,count=0;FILE *fp=fopen("check.txt(txt file)","r");while(!feof(fp)) {        for(i=1;i<35;i...

anup

• Oct 25th, 2006

You can use 'cut' commandcut -c10-20

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abhimanipal

 Profile Answers by abhimanipal Questions by abhimanipal

• Jan 19th, 2010

This program will complie in C but not in C++int main(){      int class= 5;}

vipin gupta

 Profile Answers by vipin gupta Questions by vipin gupta

• Aug 3rd, 2007

The following program compiles with 'C' with a warning about return type of main. But it wouldn't compile with 'C++', it gives error there:void main(){return;}

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Explain with an example and how to develop the program

kamal7725

 Profile Answers by kamal7725 Questions by kamal7725

• Nov 30th, 2007

Pseudo is not a programming language. It is your language. before writtinga program, we usually draw a blue print on the papar. likeif a > 0??? then show a proper messageelse??? get the data from user.like, and then we write this in C++ or Java or any language which you know.

sachipatnaik2008

 Profile Answers by sachipatnaik2008 Questions by sachipatnaik2008

• Sep 12th, 2007

Pseudo Code the code for designing any type of programs. Pseudo Code is otherwise known as algorithm. The Pseudo code helps any one to solve any type of problems.A person does  not know any type ...

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amritshukla

 Profile Answers by amritshukla Questions by amritshukla

• Sep 24th, 2010

There is no easy way to make a direct comparison between volatile and const, although I suppose in some sense they are exact opposites. Modifying a variable definition with const means that the compil...

kamal7725

 Profile Answers by kamal7725 Questions by kamal7725

• Nov 29th, 2007

A volatile variable is nothing but a local variable which gets destroyed as soon as its scope reachs to end.we use the constant qualifier to make the value unchangable. This value could be volatile.

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How many nested if statements are allowed in C?

jbode

 Profile Answers by jbode Questions by jbode

• Feb 18th, 2012

Per the C language standard, there must be *at least* 127 levels of nesting.

aman15490

 Profile Answers by aman15490 Questions by aman15490

• Nov 6th, 2008

There is no such limitations you can use any no of nested if statement.

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What is the basic principle behind recursion, other than function calling itself again & again and in which real time scenario we use it?

jbode

 Profile Answers by jbode Questions by jbode

• Oct 4th, 2010

The basic idea behind recursion is that you're solving one big problem by breaking it into multiple smaller, easier-to-solve problems.  This can make the algorithm easier to write and un...

anandkumarjha

 Profile Answers by anandkumarjha Questions by anandkumarjha

• Aug 29th, 2010

Recursion is the process of calling function again and again.During the recursion many push and pop operation is done in our registers memory. That's why recursion has very poor performance.Our compu...

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Which function in C library helps to sort the elements in an array quickly?

maverick23

 Profile Answers by maverick23 Questions by 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

 Profile Answers by maverick23 Questions by maverick23

• Mar 19th, 2011

There is only one sort function in c library (stdlib.h) called as "qsort()"

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How to swap two numbers without using temporary variable?

Shiva

• Sep 27th, 2011

Place the statement you want to print in the if block

Code
span style="color: #ff0000;">"hai shiva shankar"))
{
}
}
 

vinaysubramanian

• Jul 17th, 2011

Code
#include<stdio.h>
#include<conio.h>
"%d %d ",&a,&b);
}  

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A type cast should not be used to override a const or volatile declaration. Overriding these type modifiers can cause the program to fail to run correctly. A type cast should not be used to turn a pointer to one type of structure or data type into another. In the rare events in which this action is beneficial, using a union to hold the values makes the programmer’s intentions clearer.  

kbjarnason

 Profile Answers by kbjarnason Questions by kbjarnason

• Jul 2nd, 2010

And it should never, ever, EVER be used to cast the return from malloc, at least in C (and if you're using C++, why are you using malloc?)

shivakumara.madegowda

 Profile Answers by shivakumara.madegowda Questions by shivakumara.madegowda

• Mar 20th, 2007

We should not cast the big datatype to smaller one. Like from double to float long to integer. TIn these cases there will be chance of loosing the valuable data itself.

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The answer depends on what you mean by quickest. For most sorting problems, it just doesn’t matter how quick the sort is because it is done infrequently or other operations take significantly more time anyway. Even in cases in which sorting speed is of the essence, there is no one answer. It depends on not only the size and nature of the data, but also the likely order. No algorithm is best in all...

kbjarnason

 Profile Answers by kbjarnason Questions by kbjarnason

• Jul 2nd, 2010

One should point out that quicksort can, on some data sets, degenerate to an O(n^2) sort - meaning the next ice age may arrive before your sort finishes.  There is, kicking around on the net some...

agni_suresh896

 Profile Answers by agni_suresh896 Questions by agni_suresh896

• Apr 19th, 2007

The algorithms which follows divide and qunquer technique provides fastest implementation.

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The #pragma preprocessor directive allows each compiler to implement compiler-specific features that can be turned on and off with the #pragma statement. For instance, your compiler might support a feature called loop optimization. This feature can be invoked as a command-line option or as a #pragma directive. To implement this option using the #pragma directive, you would put the following line into...

satheesh.reddy

 Profile Answers by satheesh.reddy Questions by satheesh.reddy

• Jul 31st, 2009

To pack one byte aligned #pragma pack(1)

soma praveen kumar

• Mar 29th, 2007

consider an examplestruct  a{char a;int b;char c;};sizeof struct a is 12 instead of 6if we declare #pragma() Before struct aThen size will Be 6.  

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/* Use printf() to print the first 11 characters of source_str. */ printf(“First 11 characters: ‘%11.11s’n”, source_str);

abhimanipal

 Profile Answers by abhimanipal Questions by abhimanipal

• Jan 30th, 2010

You cannot use pointers to print the first 11 characters of a string.

abhimanipal

 Profile Answers by abhimanipal Questions by abhimanipal

• Aug 21st, 2009

You can also print it using pointers....Try this following code segment ... This does the trick. char str[]="The Sky is Blue and so are you";char *s1= &str[5];printf("%sn",s1);

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A void pointer is a C convention for “a raw address.” The compiler has no idea what type of object a void Pointer “really points to.” If you write int *ip; ip points to an int. If you write void *p; p doesn’t point to a void! In C and C++, any time you need a void pointer, you can use another pointer type. For example, if you have a char*, you can pass it to a function that expects a void*. You don’t...

ashish

• Aug 18th, 2011

The pointer is easily convert into any other type of pointer variable is called void pointer.

Main ex-dynamic memory allocation function use void pointer to convert to type of pointer.

Ashwan

• Jul 26th, 2007

Void Pointer or Generic Pointer is the one to which any datatype can be assigned.eg.main(){    int *p;     void *vp;     vp=p;}

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No. There’s no way to tell, at runtime, how many elements are in an array parameter just by looking at the array parameter itself. Remember, passing an array to a function is exactly the same as passing a pointer to the first element.

yba

• Jul 9th, 2007

The comment is incorrect, the original answer is correct.In C, passing an array as a parameter does not pass any information about how many elements are in the array.  sizeof() can tell you the s...

kiran

• May 8th, 2007

Yes, the sizeof operator can tell the size of the array.It gives the number of bytes reserved for that array.

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The expression n++ requires a single machine instruction such as INR to carry out the increment operation whereas, n+1 requires more instructions to carry out this operation.

kbjarnason

 Profile Answers by kbjarnason Questions by kbjarnason

• Jul 2nd, 2010

If n++ executes faster than n = n + 1, the reason for it is simple: your compiler has a poor optimizer.

romainn

• Jun 14th, 2007

N++ takes more than one instruction, ++n is faster. n++ has to store n, increment the variable and return n, while ++n increment n and return without storing the previous value of n.

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1)The same auto variable name can be used in different blocks2)There is no side effect by changing the values in the blocks3)The memory is economically used 4)Auto variables have inherent protection because of local scope

plan_with.me

 Profile Answers by plan_with.me Questions by plan_with.me

• Jan 27th, 2008

The main advantage of auto variable is if we use auto variable in different block of our code with different value then it has not any sideeffect because it is automatically managed by the compiler .

vinod

• Feb 22nd, 2007

Auto variable have initial value as garbage.auto int and int are  one and the same.

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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

 Profile Answers by stshekhar Questions by 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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B

Dinesh

• Oct 12th, 2007

I think value of y = 5.Because if you format the code, it will look like thisx = 10;y=5;if (x==10){}else if(x==9){}else{   y=8;}Since value of x is 10 so condition if (x==10) will satis...

sathish

• Mar 27th, 2007

Value of y is 8

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