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How to swap the content oftwo variables without a temporary variable
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}
">Main(){ printf("%d, %d", sizeof('c'), sizeof(100));}
A) 4, 100B) 2, 100C) 2, 2D) 4, 4
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Global variables in c program
If i initialize a global array locally in main function i can still access those elements in other functions as if the elements of array were global whereas this is not the case if i do the same with other basic variables like int i.can someone explain?
anjali_taneja
- Jul 6th, 2011
Global variables are stored in Heap.They have global access anywhere in the program.But local variable get priority over global variable.
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printf("%s", obj->pName);
}
">Struct Foo{ char *pName;};main(){ struct Foo *obj = malloc(sizeof(struct Foo)); clrscr(); strcpy(obj->pName,"Your Name"); printf("%s", obj->pName);}
A) NameB) compile errorC) Your NameD) Runtime error
kgupta11oct
- Jul 6th, 2011
Hi Everyone,It seems simple but tricky. by allocating memory of size struct Foo does not allocate memory if there is any pointer variable in structure itself.Please allocate memory to that varia...
yba
- Jul 10th, 2007
If we assume you have a compiler that isn't strictly enforcing Ansi-C, and you make it to having an executable, the interviewer probably wants you to realize why this code is in error.The call to ...
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char *b = "World";
clrscr();
printf("%s", strcpy(a,b));
}
">Main(){ char *a = "Hello "; char *b = "World"; clrscr(); printf("%s", strcpy(a,b));}
A) None of the aboveB) “HelloWorld”C) “Hello World”D) “Hello”Explanation: World, copies World on a, overwrites Hello in a.
kgupta11oct
- Jul 6th, 2011
This will crash as strcpy will try to modify the content of string a that is default constant and can not be modified.Regards,Kapil
vijay sharma
- Jan 31st, 2006
This program will generate error as you are changing the contents of a const variable. as char *a ="Hello" signifies that a can point to some other location but its content can't be changed. strcpy(a,b) is copying b into a which is not allowed. So it will generate error.
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C program for command line argument
Write c program to accepts file name at command line argument and coverts all characters in the file to uppercase ?
kgupta11oct
- Jul 7th, 2011
#include "stdafx.h"#include int main(int argc, char*argv[]) {FILE* fp = NULL;char * fileName = "File.cpp"; fp = fopen(fileName,"r");char c = getc(fp);while (c != EOF) {c = toupper(c);putchar(c);c = getc(fp);}fclose (fp);return 0; }
bmlal
- Jul 14th, 2006
Int main(int argc, char *argv[]){ FILE *fp; char ch; if (argc != 2) { printf("pass two argumentsn"); exit (-1); } fp = fopen(argv[1], "r+"); if (fp == NULL) { printf("error in file openingn"); exit (-1); } ch = fgetc(fp); while (ch != EOF) { if (ch greaterThan=97 && ch lessTan
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Fibbonaci series program
jintojos
- May 24th, 2008
// Fibnocci Series Using Recursion #include<stdio.h> #include<conio.h> void fun(int,int); int num; void main() { clrscr(); p...
jintojos
- May 24th, 2008
// Fibnocci Series Using Recursion #include #include void fun(int,int); int num; void main() { clrscr(); printf("Enter The Limit :"); scanf("%d",&num); printf("The Fibnocci Series Up To %d Is...
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*ptr++;
printf("%sn",ptr);
ptr++;
printf("%sn",ptr);
}
explain difference between *ptr++ and ptr++">Find the output for the following C programmain(){char *ptr = "Ramco Systems";*ptr++;printf("%sn",ptr);ptr++;printf("%sn",ptr);}explain difference between *ptr++ and ptr++
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FILE *fp;What is size of FILE data type???
kbjarnason
- Jul 7th, 2011
"If you look in stdio.h, you see..." - which stdio.h? The one from visual studio 95? gcc for Linux? Some other one? Those header files are not identical from im...
kgupta11oct
- Jul 7th, 2011
If you see the declaration of FILE in stdio.h:struct _iobuf { char *_ptr;int _cnt; char *_base;int _flag; int _file;int _charbuf; int _bufsiz;char *_tmpfname; };As there is no packing, the default wil...
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C Code to print number in reverse
Write a program to print the given number in reverse order for e.g 123 as 321
Padma Sirisha
- Jul 13th, 2011
Here is the code
Code- #include<stdio.h>
- "enter the u want number");
- scanf("%d""the reverse number is;%d",reverseno);
- }
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How many types of sortings are there in C? What are they
asdf
- Jul 14th, 2011
There are in total 16 types of Sortings....
techoverdose
- Mar 3rd, 2011
Basically sorting are of two types only :-A.Position Based 1.Selection sort 2.Radix sort 3.Bucket sort, etc.B.Comparison Based 1.Bubble sort 2.Quick sort 3.Merge sort 4.Binary sort,etc.
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How do you override a defined macro?
You can use the #undef preprocessor directive to undefine (override) a previously defined macro.
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Calculate the weighted average of a list of n numbers
Calculate the weighted average of a list of n numbers using the formula
xavg = f1x1+f2x2+ ….+ fnxn
where the f’s are fractional weighting factors, i.e.,
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What is the output of the following program? #define SQR(x) (x*x) main() { int a,b=3; a= SQR(b+2); printf("%d",a); } a) 25 b) 11 c) error d) garbage value
ign407
- Jul 31st, 2011
Answer is 11
a= SQR(b+2) is equivalent to writing a=(3+2*3+2) here arthimetic operator * has high preference so
which gives 11. hence, option B is correct. -
How do you loop a program to display your name however times you want it to.
and to display " Hello %s!! Do you want to try again [Y/N]? "
jyothisudi
- Aug 6th, 2011
Here is the code
Code- #include<stdio.h>
- #include<conio.h>
- "enter your name");
- scanf("%s""enter the number of times you want to repeat the loop");
- scanf("%d""%s""Hello %s!!! do you want to try again Y/N"'Y')
- }
Rajath
- Aug 5th, 2011
Read the name from the user and until his choice becomes 0 keep printing his input name through the while loop "c #include #include int main() { int i,n; char name[100]; ...
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BSS Data Segment
What is a bss data segment?
sudheer .T
- Aug 7th, 2011
BSS (Block started by symbol), a part of Data Segment store all variables initialized to 0. static variable(initialized with value other than 0) are not stored in BSS.
Actually BSS is an "Uninitialized RAM" which is initialized to 0 before executing main().alokag
- Jun 25th, 2009
BSS, a part of Data Segment store all variables initialized to 0. static variable(initialized with value other than?0) are not?stored in BSS.Actually BSS is an "Uninitialized RAM" which is initialized to 0 before executing main().
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Consider the following C codemain(){int i=3,x;while(i>0){x=func(i);i--;}int func(int n){static sum=0;sum=sum+n;return(sum);}}The final value of x isA. 6B. 8C. 1D. 3
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Find the output of the following programmain(){int x=5, *p;p=&xprintf("%d",++*p);}A. 5B. 6C. 0D. none of these
Rohan
- Feb 23rd, 2006
Ans is ( B ) *p=5 and ++*p=++x ++x = 6 read operator precedence for more details
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Tricky C Program
Write a C program to find a peculiar two digit number which is three times the sum of its digits.
paruchurimaheshgoud
- Aug 17th, 2011
Simple logic
Code- #include<iostream>
- "spl"
Rajath
- Aug 5th, 2011
The only peculiar two digit num is 27..
Code- #include<stdio.h>
- "The value is %d%d"
Sum 0f 2 64 bits using 32 bits
Hi,the question is you have cpu that knows to docomputations on 32 bits(unsigned integer).write a function that find the sum of 2 64 bits numbers using this cpu?there is a struct:typedef struct{ int low;(32 bits) int high;(32 bits)}64bit;
devendra
- Aug 17th, 2011
well this can be done in any number of ways... One simple way is to use asm keyword and write assembly instructions if you are familiar with assembly language.. Because through assembly language we ca...
amodiahs
- Jul 24th, 2008
Hello friends, Here we need to use a linked list. See, it is already known that CPU doesnot support one single 64bit number hence, first thing is that using normal data types will be useless. So here ...
Ans