C language interview questions solution for freshers beginners placement tricky good pointers answers explanation operators data types arrays structures functions recursion preprocessors looping file handling strings switch case if else printf advance linux objective mcq faq online written test prime numbers Armstrong Fibonacci series factorial palindrome code programs examples on c++ tutorials and pdf

linear search starts from one value, like the smallest, then iterates through each value to see if it finds what it is searching for, so for example, if looking for the number 19 from 0-40, linear search would go: 1, 2, 3, 4, 5 etc til it reached 19

binary search instead, splits the value in 2, until it finds it, so it will do: is the number in the middle of 0-40 ? (20, in other words) No, then is the value more than, or less than 20? If more, then check the middle between 20-40 If less, check 0-20 then repeat

So in this case, that would give us: 10 (0-20) 15 (10-20) 17(or 18) (15-20) 19, found it!

The reason this is efficient is that it makes it way faster to search through numbers When the sample size is small, it might not make a difference, but when searching through really big numbers, it will show

For example, find 19000 out of 0-1000000 (one milion) 500000 (0-1000000) 250000 (0-500000) 125000 (0-250000) 62500 (0-125000) 31250 (0-62500) 15625 (0-31250) 23437 (15625-31250) 19531 (15625-23437) 17578 (15625-19531) 18555 (17578-19531) 19043 (18555-19531) 18799 (18555-19043) 18921 (18799-19043) 18982 (18921-19043) 19012 (18982-19043) 18997 (18982-19012) 19004 (18997-19012) 19000 (18997-19004), Found it!

So in this example it takes 19 steps out of a 1000000 (Milion) numbers With linear search it would have taken 19000, in this case I think that out of a 1000000000 (Bilion) numbers, it would only require 4-5 more steps to 19.

So basically, it stays pretty quick even if the numbers increase dramatically.

int main() { int c, first, last, middle, n, search, array[100];

printf("Enter number of elements\n"); scanf("%d",&n);

printf("Enter %d integers\n", n);

for ( c = 0 ; c < n ; c++ ) scanf("%d",&array[c]);

printf("Enter value to find\n"); scanf("%d",&search);

first = 0; last = n - 1; middle = (first+last)/2;

while( first <= last ) { if ( array[middle] < search ) first = middle + 1; else if ( array[middle] == search ) { printf("%d found at location %d.\n", search, middle+1); break; } else last = middle - 1;

middle = (first + last)/2; } if ( first > last ) printf("Not found! %d is not present in the list.\n", search);

#include #include int key,A[5],m,i,lb,ub; int binary(key,A[],lb,ub) { if(lb>ub) { printf("\n Search failed"); return; } m=lb+ub/2; if(key==A[m]) { printf("\n Match Found and value is %d",key); return; } elseif(key<A[m]) { ub=m-1; binary(key,A[],lb,ub); } else { lb=m+1; binary(key,A[],lb,ub); } } void main() { clrscr(); for(i=0;i<5;i++) { printf("\n Enter the value in array:\n"); scanf("%d",&A[i]) } printf("\n Enter the value of item to search:\n"); scanf("%d",&key); lb=A[0]; ub=A[5]; binary(key,A[],lb,ub); getch(); }

Given a number.You have to find the binary equivalent of that number first. Your task is to rearrange the 0's and 1's in the binary equivalent found to all the combinations and print all the numbers which form a co-prime with the digit entered.Print nil if no co-prime is found.

This seems to go infinite unless specified differently, but I may very much be wrong, here is what I am thinking though,

if (m > n || m < 0 ) return 0;

Unless you want to allow the array to contain negative numbers, in that case I assume one would have to put in an algorithm to initiate the smallest number in the array to a variable, then insert that one instead of 0 in the above if statement, one way would be to insert below inside the for loop when scanning for a[i]:

// once there is exactly 2 elements in the array a[], then initialize min variable as the smallest number if (i == 1) min = a[0]; // Now one can compare each iteration to see if a number in the array a[] is smaller if (a[i] < min) min = a[i];

So after this, one can use the code above, now in this way:

if (m > n || m < min ) return 0;

But hey, I am actually very very new to this, so please let me know if this even works at all, I am currently learning how to implement binary search, so hopefully my thoughts here are in the ball park at least :)

not working

ReplyDeleteyou try again

Deletenot working for odd num of array element

Deleteex a[15]={1,3,5,7,8,10,12,13,20,34,42,56,61,71,85}

for above array it not working

Hello friend ur program is working sucessfully. Thanks for it.

ReplyDeletecud u put some comments 2 make it easier 2 undrstand

ReplyDeletethanx bro!!! u got a good hand in C!!!!!!!!

ReplyDeleteplease put some comments

ReplyDeletethanks

ReplyDeletehey i need a program for graphical representation of binary search in c

ReplyDeletehey can i get a program of queue in c using graphic.c

ReplyDeleteGood Job

ReplyDeleteit saves our time ....... thanx

ReplyDeletelucky guy

ReplyDeleteonly works if input array is already sorted

ReplyDeleteseocndly ..for m<a[mid]){ u=mid-1; the loop will go infinte

ReplyDeletesorry it wont go infinite..

ReplyDeleteI think l < u would be correct

ReplyDeleteIt is not working......

ReplyDeletecan show us it's algorithm as well as flowchart.

ReplyDeletegood work

ReplyDeletefor searching,array must be sorted

ReplyDeleteits realy gud thanx dear

ReplyDeleteCould always the input be in ascending order?

ReplyDeleteYup it should always be in ascending order.

Deletenice work bro

ReplyDeletethank you very much. i feel very easy in using 'c' in this blog. so simple and power

ReplyDeleteprasad..

simple huffman algorithm

ReplyDelete#include

#include

#include

void main()

{

struct huff

{

long int freq,code;

char data[10];

}h[50];

long int n,n1=100,i,j,n2=90,temp;

char tempc[10];

clrscr();

printf("\t\t\tHUFFMAN ALGORITHM\n\n");

printf("Enter the number of character");

scanf("%ld",&n);

for(i=0;i<n;i++)

{

printf("Enter the character::");

scanf("%s",h[i].data);

printf("Enter the frequency for character %s::", h[i].data);

scanf("%ld",&h[i].freq);

}

for(i=0;i<n-1;i++)

{

for(j=1;j<n;j++)

{

if(h[i].freq<h[j].freq)

{

temp=h[i].freq;

h[i].freq=h[j].freq;

h[j].freq=temp;

strcpy(tempc,h[i].data);

strcpy(h[i].data,h[j].data);

strcpy(h[j].data,tempc);

}

}

}

h[0].code=10;

h[1].code=11;

for(i=2;i<n;i++)

{

if(i%2==0)

{

h[i].code=h[i-2].code+n1;

n1=n1*10;

}

else

{

h[i].code=h[i-2].code+n2;

n2=n2*10;

}

}

printf("Huffman code");

printf("\nchar\tfreq\tcode");

for(i=0;i<n;i++)

{

printf("\n%s\t%ld\t%ld\n",h[i].data,h[i].freq,h[i].code);

}

getch();

}

cud u pls do d programs fo findin hcf & lcm ?

ReplyDeletegood one.....

ReplyDeletethanx ....but pls put commands....sir

ReplyDeleteso many closed braces but only one open brace...how ca it work!!!

ReplyDeleteThankzzzz....!!!!!

ReplyDeleteItzz really very useful 2 meeee......!!!!!!

Thank you dude its working thanks a lot

ReplyDeletegood

ReplyDelete#include

ReplyDeleteint main(){

int a[10],i,n,m,c=0,l,u,mid;

int j;

printf("Enter the size of an array: ");

scanf("%d",&n);

printf("Enter the elements in ascending order: ");

for(i=0;i<n;i++){

scanf("%d",&a[i]);

}

printf("Enter the number to be search: ");

scanf("%d",&m);

for(j=0;j<n;j++)

{

if(m==a[j])

{

c=1;

}

}

if(c==0)

printf("The number is not found.");

else

printf("The number is found.");

return 0;

}

what is the diff between linear search and binary search

ReplyDeletelinear search starts from one value, like the smallest, then iterates through each value to see if it finds what it is searching for, so for example, if looking for the number 19 from 0-40, linear search would go:

Delete1, 2, 3, 4, 5 etc til it reached 19

binary search instead, splits the value in 2, until it finds it, so it will do:

is the number in the middle of 0-40 ? (20, in other words)

No, then is the value more than, or less than 20?

If more, then check the middle between 20-40

If less, check 0-20

then repeat

So in this case, that would give us:

10 (0-20)

15 (10-20)

17(or 18) (15-20)

19, found it!

The reason this is efficient is that it makes it way faster to search through numbers

When the sample size is small, it might not make a difference, but when searching through really big numbers, it will show

For example, find 19000 out of 0-1000000 (one milion)

500000 (0-1000000)

250000 (0-500000)

125000 (0-250000)

62500 (0-125000)

31250 (0-62500)

15625 (0-31250)

23437 (15625-31250)

19531 (15625-23437)

17578 (15625-19531)

18555 (17578-19531)

19043 (18555-19531)

18799 (18555-19043)

18921 (18799-19043)

18982 (18921-19043)

19012 (18982-19043)

18997 (18982-19012)

19004 (18997-19012)

19000 (18997-19004), Found it!

So in this example it takes 19 steps out of a 1000000 (Milion) numbers

With linear search it would have taken 19000, in this case

I think that out of a 1000000000 (Bilion) numbers, it would only require 4-5 more steps to 19.

So basically, it stays pretty quick even if the numbers increase dramatically.

#include

ReplyDeleteint main()

{

int c, first, last, middle, n, search, array[100];

printf("Enter number of elements\n");

scanf("%d",&n);

printf("Enter %d integers\n", n);

for ( c = 0 ; c < n ; c++ )

scanf("%d",&array[c]);

printf("Enter value to find\n");

scanf("%d",&search);

first = 0;

last = n - 1;

middle = (first+last)/2;

while( first <= last )

{

if ( array[middle] < search )

first = middle + 1;

else if ( array[middle] == search )

{

printf("%d found at location %d.\n", search, middle+1);

break;

}

else

last = middle - 1;

middle = (first + last)/2;

}

if ( first > last )

printf("Not found! %d is not present in the list.\n", search);

return 0;

}

its realy gud thanks

ReplyDeletei am getting it a postion before. ex 1 2 3 4 and i choose to search 3 it show the postion of 3 as 2. help :)

ReplyDeletecan i get the logic of the program

ReplyDelete#include

ReplyDelete#include

int key,A[5],m,i,lb,ub;

int binary(key,A[],lb,ub)

{

if(lb>ub)

{

printf("\n Search failed");

return;

}

m=lb+ub/2;

if(key==A[m])

{

printf("\n Match Found and value is %d",key);

return;

}

elseif(key<A[m])

{

ub=m-1;

binary(key,A[],lb,ub);

}

else

{

lb=m+1;

binary(key,A[],lb,ub);

}

}

void main()

{

clrscr();

for(i=0;i<5;i++)

{

printf("\n Enter the value in array:\n");

scanf("%d",&A[i])

}

printf("\n Enter the value of item to search:\n");

scanf("%d",&key);

lb=A[0];

ub=A[5];

binary(key,A[],lb,ub);

getch();

}

plz give me the ans for this question

ReplyDeleteGiven a number.You have to find the binary equivalent of that number first. Your task is to rearrange the 0's and 1's in the binary equivalent found to all the combinations and print all the numbers which form a co-prime with the digit entered.Print nil if no co-prime is found.

This seems to go infinite unless specified differently, but I may very much be wrong, here is what I am thinking though,

ReplyDeleteif (m > n || m < 0 )

return 0;

Unless you want to allow the array to contain negative numbers, in that case I assume one would have to put in an algorithm to initiate the smallest number in the array to a variable, then insert that one instead of 0 in the above if statement, one way would be to insert below inside the for loop when scanning for a[i]:

// once there is exactly 2 elements in the array a[], then initialize min variable as the smallest number

if (i == 1)

min = a[0];

// Now one can compare each iteration to see if a number in the array a[] is smaller

if (a[i] < min)

min = a[i];

So after this, one can use the code above, now in this way:

if (m > n || m < min )

return 0;

But hey, I am actually very very new to this, so please let me know if this even works at all, I am currently learning how to implement binary search, so hopefully my thoughts here are in the ball park at least :)

Define a binary search.illustrate the binary search algorithm with graphical representation

ReplyDeletePlease any body to can answer fast

ReplyDelete