Recent questions in Programming and DS / GATE Overflow for GATE CSE

0 votes

1 answer

3421

strings in C
I am trying to implement strcpy manually but am getting error. What is the error? Please help! #include<stdio.h> char* cpy(char *a,char *b) { char *arr; arr=&a; while((*a++=*b++)!='\0'); printf("%s", arr); } int main() { char s[15]="Sreeja"; char t[15]="Mukherjee"; cpy(&s,&t); }

I am trying to implement strcpy manually but am getting error. What is the error? Please help! #include<stdio.h char* cpy(char *a,char *b) { char *arr; arr=&a; ...

Bongbirdie

982 views

Bongbirdie asked May 2, 2017

0 votes

1 answer

3422

Please explain already answered Question
Link to the question - https://gateoverflow.in/20611/tifr2011-b-30 Someone please simplify that question and explain.

Link to the question - https://gateoverflow.in/20611/tifr2011-b-30Someone please simplify that question and explain.

iarnav

486 views

iarnav asked May 2, 2017

0 votes

1 answer

3423

relational operator
Why is the answer a).Answer should be c.Please tell if I am wrong...

Why is the answer a).Answer should be c.Please tell if I am wrong...

Aakash1125

326 views

Aakash1125 asked May 2, 2017

4 votes

1 answer

3424

IIITH - PGEE 2017
main() { int c=0,x,i,y; for(i=0;i<N;i++) { x=random();y=random(); if((x2+y2)<1) c++; } print(c); } random() is a function which returns random number between $0$ or $1$, $N$ is a large number what is the output of the program?

main() { int c=0,x,i,y; for(i=0;i<N;i++) { x=random();y=random(); if((x2+y2)<1) c++; } print(c); }random() is a function which returns random number b...

dragonball

2.4k views

dragonball asked May 2, 2017

0 votes

1 answer

3425

linked list
What is the correct option?? dummy header is sometimes used to point first node and sometime last but here I don,t know what is correct option?

What is the correct option??dummy header is sometimes used to point first node and sometime last but here I don,t know what is correct option?

Aakash1125

2.7k views

Aakash1125 asked May 1, 2017

1 votes

3 answers

3426

linked list
I think option should be a) but given is c.here head pointer point the first node whereas tail pointer point the last node And if want to delete the first element then element will be deleted but head pointer will be free.then how to head pointer point the first node/element.Pls tell what is correct??

I think option should be a) but given is c.here head pointer point the first node whereas tail pointer point the last node And if want to delete the first element then el...

Aakash1125

828 views

Aakash1125 asked Apr 30, 2017

0 votes

1 answer

3427

function
What is this statement means ?? what is correct option??

What is this statement means ?? what is correct option??

Aakash1125

576 views

Aakash1125 asked Apr 30, 2017

0 votes

0 answers

3428

MargeSort Algorithm Implementation
#include<stdio.h> void mergeArray(int arr[],int l,int m,int r) { int n1=m-l+1; int n2=r-m; int Larr[n1]; int Rarr[n2]; int i,j,k; for(i=0;i<n1;i++) Larr[i]=arr[l+i]; for(j=0;j<n2;j++) Rarr[j]=arr[m+1+j]; i=0; j=0; ... 0; } In this code when i am giving the input n=5; 2 3 1 4 5 than it will give 1 2 3 1 2 where is the problem can anyone explain ?

#include<stdio.h>void mergeArray(int arr[],int l,int m,int r){int n1=m-l+1;int n2=r-m;int Larr[n1];int Rarr[n2];int i,j,k;for(i=0;i<n1;i++) Larr[i]=arr[l+i];for(j=0;j<...

Nitesh Choudhary

364 views

Nitesh Choudhary asked Apr 29, 2017

2 votes

1 answer

3429

C programming - Output ?
Assume sizeof int as 4 #include <stdio.h> unsigned int L = (sizeof(unsigned int)) << 3; int foo(unsigned int m,unsigned int start,unsigned int length) { length = length >> 1; if(!length) { return m&(1<<start)?1:0; }else { int n1 = foo( ... (m,start+length,length); return n1+n2; } } int main() { int m = 100; printf("%d\n",foo(m,0,L)); }

Assume sizeof int as 4#include <stdio.h unsigned int L = (sizeof(unsigned int)) << 3; int foo(unsigned int m,unsigned int start,unsigned int length) { length = length > 1...

dd

1.1k views

dd asked Apr 29, 2017

1 votes

1 answer

3430

How to find address of an element in array in Binary
Let's say we have an array of 5 elements. Array index starts from 0 Base address of Array = 100 size of each element is 2 ie it's an int array Now we want to find the 2nd element ie A[2]. So, the procedure is like - A[2] ... element in memory) A[2] = 100+(2*2) Now how to find the BOLD text ie address of 2nd element in BINARY?! Thanks

Let's say we have an array of 5 elements.Array index starts from 0 Base address of Array = 100 size of each element is 2 ie it's an int arrayNow we want to find the 2nd e...

iarnav

1.9k views

iarnav asked Apr 28, 2017

0 votes

3 answers

3431

while loop
what does following code mean if j=0 and a and b are two character pointers to two strings: while(a[j]&&b[j])

what does following code mean if j=0 and a and b are two character pointers to two strings: while(a[j]&&b[j])

nabadeep

607 views

nabadeep asked Apr 27, 2017

0 votes

0 answers

3432

C programming
What does the following program print? #include < stdio.h > void f (int *p, int * g) { p = q; *p = 2; } int i = 0, j = 1; int main ( ){ f(&i, & j); printf ("%d %d \ n", i, j); return 0; }

What does the following program print?#include < stdio.h >void f (int *p, int * g) {p = q;*p = 2;}int i = 0, j = 1;int main ( ){f(&i, & j);printf ("%d %d \ n", i, j);retu...

shalini j

429 views

shalini j asked Apr 27, 2017

0 votes

0 answers

3433

pointer to array
how this question gives -3? according to rule both pointers must pointing to same array then only difference ie ptr1-ptr2 is used but here how answer always is -3??? Turbo c also giving -3.

how this question gives -3? according to rule both pointers must pointing to same array then only difference ie ptr1-ptr2 is used but here how answer always is -3???Turbo...

Aakash1125

850 views

Aakash1125 asked Apr 26, 2017

0 votes

1 answer

3434

Modified form of gate - 2000 , ISRO 2015
#include<stdio.h> struct { short x[5]; union { float y; long z; }u; }t; int main() { printf("short=%d\n",sizeof(short)); printf("float=%d\n",sizeof(float)); printf("long=%d\n",sizeof(long)); printf("%d", ... } Answer should be 14 but why the answer is 16 ? Note : short : 2 bytes , float : 4 bytes , long : 4 bytes

#include<stdio.h struct { short x[5]; union { float y; long z; }u; }t; int main() { printf("short=%d\n",sizeof(short)); printf("float=%d\n",sizeof(float)); printf("long=%...

dragonball

487 views

dragonball asked Apr 26, 2017

4 votes

1 answer

3435

Problem with Linked List Code
I was trying to implement the Linked List code in C. It compiles fine but doesn't give any output. What seems to be the error? I think I messed up at passing pointer references as function parameters. My Code (Insert At Beginning): ... node(pointer to pointer) to the function. - Return the modified head node by the function. Please read about Reference Semantics.

I was trying to implement the Linked List code in C. It compiles fine but doesn't give any output. What seems to be the error? I think I messed up at passing pointer refe...

RahulVerma

1.0k views

RahulVerma asked Apr 26, 2017

0 votes

1 answer

3436

What is the difference between #include<stdio.h> and #include "stdio.h".
What is the difference between #include<stdio.h> and #include "stdio.h".

What is the difference between #include<stdio.h and #include "stdio.h".

Nitesh Choudhary

1.1k views

Nitesh Choudhary asked Apr 25, 2017

0 votes

1 answer

3437

C Program Query
#include <stdio.h> #include <math.h> int main() { int number, originalNumber, remainder, result = 0, n = 0 ; printf("Enter an integer: "); scanf("%d", &number); originalNumber = number; while (originalNumber != 0) { ... will be false while (originalNumber != 0) { remainder = originalNumber%10; result += pow(remainder, n); originalNumber /= 10; }

#include <stdio.h #include <math.h int main() { int number, originalNumber, remainder, result = 0, n = 0 ; printf("Enter an integer: "); scanf("%d", &number); originalNum...

iarnav

437 views

iarnav asked Apr 25, 2017

0 votes

1 answer

3438

C programming doubt
#include <stdio.h> int main() { int n, i; unsigned long long factorial = 1; printf("Enter an integer: "); scanf("%d",&n); // show error if the user enters a negative integer if (n < 0) printf("Error! Factorial of a negative ... } return 0; } Doubt 1 = Why we initialized i=2 and not i=1 Doubt 2 = What if user enter the integer as 0 Thanks!

#include <stdio.h int main() { int n, i; unsigned long long factorial = 1; printf("Enter an integer: "); scanf("%d",&n); // show error if the user enters a negative integ...

iarnav

440 views

iarnav asked Apr 24, 2017

2 votes

1 answer

3439

time complexity
T(n)=2.T((n)^(1/2)) + log ((n)^(1/2)) whats the time complexity?????????????????????????/

T(n)=2.T((n)^(1/2)) + log ((n)^(1/2))whats the time complexity?????????????????????????/

akankshadewangan24

350 views

akankshadewangan24 asked Apr 24, 2017

0 votes

2 answers

3440

order of precedence
Please tell why answer is (d)?

Please tell why answer is (d)?

Aakash1125

2.6k views

Aakash1125 asked Apr 23, 2017

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