Program kalkulator menggunakan bahasa pascal dan pake dua statemen

OBJECTIVE This project will familiarize you with the use of pthreads, pthread mutexes and pthread condition variables. Your prog

zysi [14]

Answer:

Check the explanation

Explanation:

/*

This program will simulate a tunnel with a limit of how many cars may move through it,

and will also simulate the cars going north and south-bound through the tunnel. We will

use pthreads, pthread mutexes, and pthread condition variables to simulate this.

*/

#include <iostream>

#include <fstream>

#include <sstream>

#include <string>

#include <unistd.h>

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <pthread.h>

#include <string.h>

#include <signal.h>

#include <sys/types.h>

using namespace std;

#define MAXTHREADS 128

static int maxCarsInTunnel;

static int maxNCarsInTunnel;

static int maxSCarsInTunnel;

static int totalNCars;

static int totalSCars;

static int currentCarsInTunnel;

static int currentNCarsInTunnel;

static int currentSCarsInTunnel;

static int numCarsWaiting;

static pthread_mutex_t lockAccess = PTHREAD_MUTEX_INITIALIZER;

static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;

void *northCar(void *arg);

void *southCar(void *arg);

struct car {

int carNo;

int travelTime;

bool waited;

};

int main() {

pthread_t cartid[MAXTHREADS];

int storage = 0;

cin >> maxCarsInTunnel;

cin >> maxNCarsInTunnel;

cin >> maxSCarsInTunnel;

cout << "Maximum number of cars in the tunnel: " << maxCarsInTunnel << endl;

cout << "Maximum number of northbound cars: " << maxNCarsInTunnel << endl;

cout << "Maximum number of southbound cars: " << maxSCarsInTunnel << endl;

unsigned int arrival_time;

char direction;

unsigned int traversal_time;

struct car argList;

while (cin >> arrival_time >> direction >> traversal_time) {

sleep(arrival_time);

argList.travelTime = traversal_time;

argList.waited = false;

if (direction == 'N') {

totalNCars++;

argList.carNo = totalNCars;

pthread_create(&cartid[storage], NULL, northCar, (void *) &argList);

}

else if (direction == 'S') {

totalSCars++;

argList.carNo = totalSCars;

pthread_create(&cartid[storage], NULL, southCar, (void *) &argList);

}

storage++;

}

for (int i = 0; i < storage; i++) {

pthread_join(cartid[i], NULL);

}

cout << totalNCars << " northbound car(s) crossed the tunnel." << endl;

cout << totalSCars << " southbound car(s) crossed the tunnel." << endl;

cout << numCarsWaiting << " car(s) had to wait." << endl;

return 0;

}

void *northCar(void* arg) {

int tunnelTime;

int carNum;

bool wait;

struct car *argptr;

argptr = (struct car *) arg;

tunnelTime = argptr->travelTime;

carNum = argptr->carNo;

wait = argptr->waited;

pthread_mutex_lock(&lockAccess);

cout << "Northbound car # " << carNum << " arrives at the tunnel." << endl;

while (currentNCarsInTunnel >= maxNCarsInTunnel || currentCarsInTunnel >= maxCarsInTunnel) {

if (wait == false) {

wait = true;

numCarsWaiting++;

}

pthread_cond_wait(&cond, &lockAccess);

}

currentNCarsInTunnel++;

currentCarsInTunnel++;

cout << "Northbound car # " << carNum << " enters the tunnel." << endl;

pthread_cond_signal(&cond);

pthread_mutex_unlock(&lockAccess);

sleep(tunnelTime);

pthread_mutex_lock(&lockAccess);

cout << "Northbound car # " << carNum << " exits the tunnel." << endl;

currentNCarsInTunnel--;

currentCarsInTunnel--;

pthread_cond_broadcast(&cond);

pthread_mutex_unlock(&lockAccess);

}

void *southCar(void* arg) {

int tunnelTime;

int carNum;

bool wait;

struct car *argptr;

argptr = (struct car *) arg;

tunnelTime = argptr->travelTime;

carNum = argptr->carNo;

wait = argptr->waited;

pthread_mutex_lock(&lockAccess);

cout << "Southbound car # " << carNum << " arrives at the tunnel." << endl;

while (currentSCarsInTunnel >= maxSCarsInTunnel || currentCarsInTunnel >= maxCarsInTunnel) {

if (wait == false) {

wait = true;

numCarsWaiting++;

}

pthread_cond_wait(&cond, &lockAccess);

}

currentSCarsInTunnel++;

currentCarsInTunnel++;

cout << "Southbound car # " << carNum << " enters the tunnel." << endl;

pthread_cond_signal(&cond);

pthread_mutex_unlock(&lockAccess);

sleep(tunnelTime);

pthread_mutex_lock(&lockAccess);

cout << "Southbound car # " << carNum << " exits the tunnel." << endl;

currentSCarsInTunnel--;

currentCarsInTunnel--;

pthread_cond_broadcast(&cond);

pthread_mutex_unlock(&lockAccess);

}

Kindly check the attached images below to see the code screenshot and code output.

8 0

4 years ago

What does it mean when it says this person is unavailable on messenger.

arsen [322]

Answer:

The user has a deactivated account

Explanation:

or the user does not have the account anymore good luck and I hope you do well <3

4 0

2 years ago

What is computer ?how does it work

Lorico [155]

Answer:

A computer is an electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program. It receives data through an input unit based on the instructions it is given and after it processes the data, it sends it back through an output device.

Explanation:

5 0

4 years ago

Read 2 more answers

Write a modular program that allows the user to enter a word or phrase and determines whether the word or phrase is a palindrome

Ostrovityanka [42]

Answer:

import java.util.Scanner;

public class num10 {

public static void main(String[] args) {

Scanner in = new Scanner(System.in);

System.out.println("Enter a word");

String word = in.nextLine();

String reversed = "";

//Get the length of the string entered

int length = word.length();

//Loop through the string and reverse th string

for ( int i = length - 1; i >= 0; i-- )

reversed = reversed + word.charAt(i);

//Compare the two strings "word" and "reversed"

if (word.equals(reversed))

System.out.println(word+" is a palindrome");

else

System.out.println(word+" is not a palindrome");

}

Explanation:

Since we know that a palindrome word is a word that reads the same forward and backward, The Idea here is:

To obtain a word from a user.
Use a for loop to reverse the word and store in another variable
Use if....else to compare the two strings and determine if they are equal, if they are equal then the word is palindrome.

6 0

4 years ago

In a _____ feedback loop, output that results from a system acts as input that moves the system in the other direction.In a ____

Svetach [21]

Answer: Negative

Explanation: A negative feedback loop has the major property of regulating on its own. It also becomes stable at certain point of time which makes it balancing feedback.The increment in the output of this system prevents the future generation of the feedback system.

The output gained as feedback is meant as the input in opposite direction in this system.Other options are incorrect because inverted feedback loop works in the inverted manner, positive feedback loop behaves as unstable system and convoluted feedback loop is not a technical term.

8 0

3 years ago