Recent questions tagged programming-in-c / GATE Overflow for GATE CSE

4 votes

3 answers

511

Made Easy Test Series:Programming(FLT4)
#include<stdio.h> #include<iostream> int bar(int m, int n){ if(m==0)return n; if(n==0)return m; return bar(n%m,m); } int foo(int m,int n){ return(m*n/bar(m,n)); } int main(){ int x=foo(1000,1500); printf("%d",x); return 0; } Output of the program is ___________

#include<stdio.h #include<iostream int bar(int m, int n){ if(m==0)return n; if(n==0)return m; return bar(n%m,m); } int foo(int m,int n){ return(m*n/bar(m,n)); } int main(...

srestha

1.0k views

srestha asked May 20, 2019

2 votes

1 answer

512

Made Easy Test Series:Programming in C
Consider the following $C$ implementation which when given $3$ numbers a,b,c as input, find the maximum of $3$ numbers $a,b,c.$ int kickstart(int a,int b,int c) { if(B1) return a; if(a>=b) return B2; return kickstart(c,a,b); } How the boxes filled up ... $a\geq c, B2:kickstart\left ( b,c,a \right );$ Is it $I) and II)$ or $I) and IV)$

Consider the following $C$ implementation which when given $3$ numbers a,b,c as input, find the maximum of $3$ numbers $a,b,c.$int kickstart(int a,int b,int c) { if(B1) r...

srestha

1.0k views

srestha asked May 19, 2019

1 votes

1 answer

513

Self doubt Data structures
Implement Linked list using stack.

Implement Linked list using stack.

shraddha priya

1.1k views

shraddha priya asked May 19, 2019

0 votes

1 answer

514

Gradeup - Programming in C
What will be the output of the below code? the answer given is E)0 but I am not getting it. #include <stdio.h> void fun(short int *a,char *b) { b += 2; short int *p = (short int*)b; *p = *a; } int main() { void (*fptr)(short int *,char ... printf("%d", arr[3]); return 0; } $A)$ Compilation error. $B) 100$ $C)$ Garbage Value $D)$ Segmentation Fault. $E) 0$

What will be the output of the below code? the answer given is E)0 but I am not getting it. #include <stdio.h void fun(short int *a,char *b) { b += 2; short int *...

Aishvarya Akshaya Vi

1.2k views

Aishvarya Akshaya Vi asked May 18, 2019

2 votes

2 answers

515

Self Doubt-Programming
Can someone explain the output of this code? and what (char*) is doing actually? #include<stdio.h> struct Ournode{ char x, y, z; }; int main() { struct Ournode p={'1', '0', 'a'+2}; struct Ournode *q=&p; printf("%c, %c", '*((char*)q+1)', '*((char*)q+2)'); return 0; }

Can someone explain the output of this code? and what (char*) is doing actually?#include<stdio.h struct Ournode{ char x, y, z; }; int main() { struct Ournode p={'1', '0',...

srestha

972 views

srestha asked May 13, 2019

2 votes

2 answers

516

Made Easy Test Series:Programming Test
Consider the following function $foo()$ void foo(int n){ if(n<=0) printf("Bye"); else{ printf("Hi"); foo(n-3); printf("Hi"); foo(n-1); } } Let $P(n)$ represent recurrence relation, indicating number of ... $1$ or $2?$

Consider the following function $foo()$void foo(int n){ if(n<=0) printf("Bye"); else{ printf("Hi"); foo(n-3); printf("Hi"); foo(n-1); } }Let $P(n)$ represent recurrence r...

srestha

1.1k views

srestha asked May 12, 2019

1 votes

0 answers

517

Made Easy Test Series : Programming Test4
Consider the following C code: int getNextGap(int gap){ gap=(gap*10)/13; if(gap<1)return 1; return gap; } void mystery(int a[ ],int n){ int gap=n; bool red=true; while(gap!=1||red==true){ gap=getNextGap(gap); red ... elements, then what output will print at last? I mostly stuck how bool function working here. Plz help me out, how program executing:(

Consider the following C code:int getNextGap(int gap){ gap=(gap*10)/13; if(gap<1)return 1; return gap; } void mystery(int a[ ],int n){ int gap=n; bool red=true; while(gap...

srestha

977 views

srestha asked May 10, 2019

1 votes

0 answers

518

Made Easy Test Series:Programming Test4-Function Call
Consider the following function int fun(int a[ ],int l, int target){ int i=0,j=0,sum=0,count=0; while(j<l){ if(sum<target){ sum=sum+a[j]; j++; } else if(sum>target){ sum=sum-a[i]; i++; } else{ count++; sum= ... call $fun\left ( a,16,8 \right )=$_______________ Given ans $6,$ but I got $4.$ Which one correct?? Any shortcut to evaluate??

Consider the following function int fun(int a[ ],int l, int target){ int i=0,j=0,sum=0,count=0; while(j<l){ if(sum<target){ sum=sum+a[j]; j++; } else if(sum>target){ sum=...

srestha

908 views

srestha asked May 8, 2019

1 votes

1 answer

519

Can anyone please explain this question step by step
#include<stdio.h> int main(){ int (*a)[5]; int arr[5][5]={ {10,65,300,400,500}, {100,20,3000,40,5000} }; a = arr; ++a ; char *ptr = (char*)*a; ++a ; printf("%d %d %d",**a,*arr[1],*ptr); return 0; }

#include<stdio.h int main(){ int (*a)[5]; int arr[5][5]={ {10,65,300,400,500}, {100,20,3000,40,5000} }; a = arr; ++a ; char *ptr = (char*)*a...

kaveeshnyk

1.1k views

kaveeshnyk asked May 7, 2019

0 votes

1 answer

520

Self-Doubt:Program
Can someone tell me, why these two same program giving different output?Is there any problem in code or compiler not producing right? Program1 Program2

Can someone tell me, why these two same program giving different output?Is there any problem in code or compiler not producing right?Program1Program2

srestha

458 views

srestha asked May 6, 2019

1 votes

1 answer

521

Array of Pointers-Self Doubt
$1)$ How to access array element with array of pointers? By pointer to an array we can access like this $(*a)[0]$,$(*a)[22]$, .. like this right? but how with array of pointer? $2)$Check these three codes , one of them use array and one of them use ... main(void) { if(*(ptr+5)==*(ptr+3)){ printf("Equal"); } else{ printf("Not Equal"); } return 0; }

$1)$ How to access array element with array of pointers? By pointer to an array we can access like this $(*a)[0]$,$(*a)[22]$,….. like thisright?but how with array of po...

srestha

836 views

srestha asked May 5, 2019

3 votes

3 answers

522

Made Easy Test Series:Programming-String
#include<stdio.h> #include<string.h> int main(void) { char *a="MADEEASY"; char *b="GATECSIT2019"; char *r=a; char *s=b; printf("%d",(int)strlen(b+3[r]-1[s])); return 0; } Ans is given $8.$ I know basic thing, but couldnot getting what strlen(b+3[r]-1[s]) returning?? Plz explain.

#include<stdio.h #include<string.h int main(void) { char *a="MADEEASY"; char *b="GATECSIT2019"; char *r=a; char *s=b; printf("%d",(int)strlen(b+3[r]-1[s])); return 0; }An...

srestha

1.6k views

srestha asked May 4, 2019

0 votes

1 answer

523

Doubt on Program:Self Doubt
#include <stdio.h> int main(void) { int s[6]={128,256,512,1024,2048,4096}; int *x=(int*)(&s+1); printf("%d",x); return 0; } #include <stdio.h> int main(void) { int s[6]={128,256,512,1024,2048,4096}; int *x=(int*)(&s+1); printf("%u",x); return 0; } Why both are printing different address? Is it not a fixed address of memory??

#include <stdio.h int main(void) { int s[6]={128,256,512,1024,2048,4096}; int *x=(int*)(&s+1); printf("%d",x); return 0; }#include <stdio.h int main(void) { int s[6]={128...

srestha

439 views

srestha asked May 4, 2019

2 votes

0 answers

524

Made Easy Test Series:Programming-Function Call
Consider the following program: void A(int n){ printf("*"); if(n>1){ A(n/4); A(n/4); A(n/4); A(n/4); } } Let $X$ be number of asterisks printed by above function when $n=1024.$ Then the value of $X$ will be ____________ How ans will be $\frac{4^{k+1}-1}{3}$ , where $k=5?$ .

Consider the following program:void A(int n){ printf("*"); if(n>1){ A(n/4); A(n/4); A(n/4); A(n/4); } }Let $X$ be number of asterisks printed by above function when $n=10...

srestha

682 views

srestha asked May 4, 2019

0 votes

2 answers

525

Made Easy Test Series: Programming
Consider the function give below, which should return the index of first zero in input array of length $n$ if present else return $-1.$ int index of zero(int[ ] array,int n){ for(int i=0; P ;i++); if(i==n){ return -1; } return i; } What should be placed ... at P',So that code will work fine? $A)$array[i]!=0 && i<=n $B)$ array[i]!=0 && i<n

Consider the function give below, which should return the index of first zero in input array of length $n$ if present else return $-1.$int index of zero(int[ ] array,int ...

srestha

648 views

srestha asked Apr 24, 2019

2 votes

4 answers

526

Made Easy Test Series:Programming and DS
Which of the following data structure is efficient to implement priority queue such as insertion ,deletion, searching? A)Linked List B)Heap C)Sorted Array D)Unsorted Array How priority queue can work more efficiently in any data structure, other than heap?

Which of the following data structure is efficient to implement priority queue such as insertion ,deletion, searching?A)Linked ListB)HeapC)Sorted ArrayD)Unsorted ArrayHow...

srestha

3.8k views

srestha asked Apr 24, 2019

0 votes

1 answer

527

Self doubt - Programming
X=2; Y=++x * ++x * ++x ; Printf("%d",Y); In the above question, we have to use the final value of x or it will be evaluated seperately and then multiplied. Ex: Y= 3*4*5; or Y=5*5*5;

X=2;Y=++x * ++x * ++x ;Printf("%d",Y);In the above question, we have to use the final value of x or it will be evaluated seperately and then multiplied.Ex: Y= 3*4*5; or Y...

Ashish Roy 1

607 views

Ashish Roy 1 asked Apr 11, 2019

0 votes

0 answers

528

GATE 1999
Consider the following C function definition: int trial (int a,int b,int c) { if ((a>=b) && (c<b)) return b; else if (a>=b) return Trial(a,c,b); else return Trial(b,a,c); } The function Trial : A) Finds the maximum of a,b,c B) Finds the minimum of a,b,c C)Finds the middle number of a,b,c D) None of these

Consider the following C function definition:int trial (int a,int b,int c) {if ((a>=b) && (c<b)) return b;else if (a>=b) return Trial(a,c,b);else return Trial(b,a,c);} Th...

Aishvarya Akshaya Vi

343 views

Aishvarya Akshaya Vi asked Apr 10, 2019

1 votes

1 answer

529

ISI2017-PCB-CS-2(b)
Write a $C$ program to fins all permutations of a string (having at most 6 characters). For example, a string of $3$ characters like $“abc"$ has 6 possible permutations: $“abc", “acb", “bca", “bac", “cab", “cba".$

Write a $C$ program to fins all permutations of a string (having at most 6 characters). For example, a string of $3$ characters like $“abc"$ has 6 possible permutations...

akash.dinkar12

510 views

akash.dinkar12 asked Apr 8, 2019

0 votes

2 answers

530

#arrays
i write this program, during initialization of array i given the size as 11 means the number of elements stored in an array is 11. as we know array is not assigned a value of index 12 and above. but in in the program array a is initialized of index from 0 to 19,my question is how the array is ... i=0;i<20;i++) { a[i]=i+1; } for(i=0;i<20;i++) { printf("%d\n",a[i]); } }

i write this program, during initialization of array i given the size as 11 means the number of elements stored in an array is 11.as we know array is not assigned a value...

shiva0

700 views

shiva0 asked Apr 7, 2019

0 votes

1 answer

531

#Dynamic memory allocation malloc
how to know how much size is allocated while dynamically allocating memory to the pointer variable with malloc. i just write the below code to know the size of ptr2 after dynamically allocating memory. i want the output is 10 but it is displaying as 2 as ... allocation failed"); else{ printf("size of *ptr2 is == %d\n",(sizeof(ptr2)/sizeof(int))); } }

how to know how much size is allocated while dynamically allocating memory to the pointer variable with malloc.i just write the below code to know the size of ptr2 after ...

shiva0

682 views

shiva0 asked Apr 6, 2019

1 votes

3 answers

532

#userdefined Data type union in C
What is the output of the program? int main() { union a { int i; char ch[2]; }; union a u; u.ch[0] = 3; u.ch[1] = 2; printf("%d, %d, %d", u.ch[0], u.ch[1], u.i); return 0; }

What is the output of the program? int main() { union a { int i; char ch ; }; union a u; u.ch[0] = 3; u.ch = 2; printf("%d, %d, %d", u.ch[0], u.ch , u.i); return 0; }

shiva0

472 views

shiva0 asked Apr 3, 2019

0 votes

0 answers

533

Programming:Self Doubt
Can somebody explain this code line by line. I am unable to get and what will be it's output? #include<stdio.h> #include<stdlib.h> void transpose(int n, const double *A, double *B, const int *lda, int *perm) { } int transpose_equal(const double *A, ... , B, r_dim, r_perm); transpose_equal(A, B, total); free(A); free(B); free(B_trans); printf("\n"); } }

Can somebody explain this code line by line. I am unable to getand what will be it’s output?#include<stdio.h #include<stdlib.h void transpose(int n, const double *A, do...

srestha

507 views

srestha asked Apr 3, 2019

1 votes

1 answer

534

Self Doubt
1. #include <stdio.h> int main() { int i; char a[] = ""; // no tab space in between if(printf("%s",a)) printf("string empty"); else printf("string is not empty"); return 0; } Output: string is not empty 2. ... ;,a)) printf("string empty"); else printf("string is not empty"); return 0; } Output: string empty Why and how so?

1.#include <stdio.h>int main() { int i; char a[] = ""; // no tab space in between if(printf("%s",a)) printf("string empty"); else printf("string is ...

Reshu $ingh

315 views

Reshu $ingh asked Apr 1, 2019

1 votes

2 answers

535

Made Easy Workbook
#include <stdio.h> int main() { int i = 258; int *iptr = &i; printf("%d",*(char*)iptr); printf("%d",*(char*)iptr+1); } Please explain the solution.

#include <stdio.h>int main() { int i = 258;int *iptr = &i;printf("%d",*(char*)iptr);printf("%d",*(char*)iptr+1); }Please explain the solution.

Reshu $ingh

704 views

Reshu $ingh asked Mar 31, 2019

0 votes

0 answers

536

Allen Career Institute:Programming
Do something (x, n) { m = n, temp = 1, z = x ; while (m > 0) do { while ((m mod z) == 0) do { m = |m/2|; z = z^{2} ; } m = m – 1; } return temp ; } Complexity of the above problem $1)\Theta \left ( log n \right )$ $2)\Theta \left ( nlog n \right )$ $3)\Theta \left (n^{2} \right )$ $4)\Theta \left (n\right )$

Do something (x, n) { m = n, temp = 1, z = x ; while (m 0) do { while ((m mod z) == 0) do { m = |m/2|; z = z^{2} ; } m = m – 1; } return temp ; }Complexity of the abov...

srestha

469 views

srestha asked Mar 28, 2019

1 votes

2 answers

537

Pointer question-C
Anyone kindly tell the reason why the outputs are differ ? #include<stdio.h> int main() { char *ptr = "geeksforgeeks"; printf("%c\n", *&*&*ptr); getchar(); return 0; } Output-g #include<stdio.h> int main() { char *ptr = "geeksforgeeks"; printf("%s\n", *&*&ptr); getchar(); return 0; } Output-geeksforgeeks

Anyone kindly tell the reason why the outputs are differ ?#include<stdio.h>int main(){ char *ptr = "geeksforgeeks"; printf("%c\n", *&*&*ptr); getchar(); return 0;}Outp...

val_pro20

1.5k views

val_pro20 asked Mar 24, 2019

1 votes

1 answer

538

Self Doubt on scoping
int x = 5, y = 10 ; void main ( ) { int i = 2, j = 3 A (i, j); } void A (int i, int j) { int x = 10, y = 5 ; i = i + x : j = i + y : printf ("%d %d", i, j); B (i, j); } void B (int i, int j) { i ... by-name 3. call-by-need 4. call-by-value 5.Static scoping 6.Dynamic scoping Any reference for call by name and call by need Is for static coping $12,17,54$ or $12,17,59$?

int x = 5, y = 10 ; void main ( ) { int i = 2, j = 3 A (i, j); } void A (int i, int j) { int x = 10, y = 5 ; i = i + x : j = i + y : printf ("%d %d", i, j); B (i, j); } v...

srestha

460 views

srestha asked Mar 23, 2019

0 votes

1 answer

539

self doubt variable scope
#include <stdio.h> /* global variable declaration */ int g = 20; int main () { /* local variable declaration */ int g ; printf ("value of g = %d\n", g); return 0; } why this printing value of g is 0 instead of garbage because g is declared which is local variable in main function. are variables inside main function by default global?

#include <stdio.h /* global variable declaration */ int g = 20; int main () { /* local variable declaration */ int g ; printf ("value of g = %d\n", g); return 0; }why thi...

Ram Swaroop

418 views

Ram Swaroop asked Mar 17, 2019

1 votes

0 answers

540

Geeks for Geeks : C Program
In the above 4 Statements which would print 123 as output ? Explain also.

In the above 4 Statements which would print 123 as output ? Explain also.

Ashish Roy 1

1.7k views

Ashish Roy 1 asked Mar 16, 2019

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