Answer Posted / kiran baviskar

#include<pthread.h>
//#include<semaphore.h>
#include<stdio.h>
#include<stdlib.h>

pthread_mutex_t x,wsem;
pthread_t tid;
int readcount;

void intialize()
{
pthread_mutex_init(&x,NULL);
pthread_mutex_init(&wsem,NULL);
readcount=0;
}

void * reader (void * param)
{
int waittime;
waittime = rand() % 5;
printf("
Reader is trying to enter");
pthread_mutex_lock(&x);
readcount++;
if(readcount==1)
pthread_mutex_lock(&wsem);
printf("
%d Reader is inside ",readcount);
pthread_mutex_unlock(&x);
sleep(waittime);
pthread_mutex_lock(&x);
readcount--;
if(readcount==0)
pthread_mutex_unlock(&wsem);
pthread_mutex_unlock(&x);
printf("
Reader is Leaving");
}

void * writer (void * param)
{
int waittime;
waittime=rand() % 3;
printf("
Writer is trying to enter");
pthread_mutex_lock(&wsem);
printf("
Write has entered");
sleep(waittime);
pthread_mutex_unlock(&wsem);
printf("
Writer is leaving");
sleep(30);
exit(0);
}

int main()
{
int n1,n2,i;
printf("
Enter the no of readers: ");
scanf("%d",&n1);
printf("
Enter the no of writers: ");
scanf("%d",&n2);
for(i=0;i<n1;i++)
pthread_create(&tid,NULL,reader,NULL);
for(i=0;i<n2;i++)
pthread_create(&tid,NULL,writer,NULL);
sleep(30);
exit(0);
}

write a program that can LOCATE and INSERT elements in array using c++ programming languages.

4045

---

1+1/2!+1/3!+...+1/n!

2421

---

find level of following tree (state, parent) " J,D I,D H,C E,B F,B G,C B,A D,A C,A A,& K,E L,E L,F M,F N,G O,H P,I P,H Q,I R,J S,K U,P T,L

2470

---

i really need help about this.. write a program to display the set of odd and even numbers separately. find the highest and lowest value of the given numbers.

2730

---

Teta-Omeg-Big-Oh Show that f(n) = n2 + 3n3 is ;(n3).

3638

---

Code for Easily Using Hash Table?

3055

---

Definition of priority queue was given. We have to implement the priority queue using array of pointers with the priorities given in the range 1..n. The array could be accessed using the variable top. The list corresponding to the array elements contains the items having the priority as the array index. Adding an item would require changing the value of top if it has higher priority than top. Extracting an item would require deleting the first element from the corresponding queue. The following class was given: class PriorityQueue { int *Data[100]; int top; public: void put(int item, int priority); // inserts the item with the given priority. int get(int priority); // extract the element with the given priority. int count(); // returns the total elements in the priority queue. int isEmpty(); // check whether the priority queue is empty or not. }; We had to implement all these class functions.

4971

---

Write a C/C++ program that connects to a MySQL server and displays the global TIMEZONE.

5125

---

develop a program to calculate and print body mass index for 200 employees

2667

---

We need to write the function to check the password entered is correct or not based on the following conditions.. a) It must have atleast one lower case character and one digit. b)It must not have any Upper case characters and any special characters c) length should be b/w 5-12. d) It should not have any same immediate patterns like abcanan1 : not acceptable coz of an an pattern abc11se: not acceptable, coz of pattern 11 123sd123 : acceptable, as not immediate pattern adfasdsdf : not acceptable, as no digits Aasdfasd12: not acceptable, as have uppercase character

4493

---

solve the problem in the programming language C++"if a five digit number is input through the keyboard.Write a program to calculate the sum of its digits(hint: use the modulus operator)

3436

---

Write a simple encryption program using string function which apply the substitution method.

6136

---

Code for Two Classes for Doing Gzip in Memory?

3279

---

write a program that creates a sequenced array of numbers starting with 1 and alternately add 1 and then 2 to create the text number in the series , as shown below. 1,33,4,6,7,9,............147,148,150 Then , using a binary search , searches the array 100 times using randomly generated targets in the range of 1 to 150

3792

---

create a stucture student containing field for roll no,class,year and marks.create 10 student annd store them in a file

2725

---