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dimulka [17.4K]
3 years ago
5

Why were QR codes created

Computers and Technology
2 answers:
Jlenok [28]3 years ago
8 0
It's used QR codes in a way that is so useful that it… QR (Quick Response) code is the trademark name for the two dimensional barcode system. It was originally invented in 1994 by Denso Wave, a Toyota subsidiary, as a way to track vehicles as they were assembled, and to scan components at high speeds.
Crank3 years ago
4 0
QR codes were created to make a way for people to easily scan codes to get to a website. So you could scan (example) a movie poster to go to the website that has advertisements and tickets.
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sveta [45]
Click the font drop-down box in the tool settings bar. Select "Arial." 6. Press "Alt-3" using your keyboard number pad's "3" key to insert the heart symbol<span>.</span>
3 0
4 years ago
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What does DHCP stand for?
Lisa [10]
Domain host control protocol is the answer
4 0
4 years ago
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#include #include int main( ) { int value = 10; int pid; value += 5; pid = fork( ); if (pid &gt; 0 ) { value += 20; } printf(val
ss7ja [257]

Explanation:

To understand how this program is working let us print the variable value at different stages of the program so that we can understand how it is working.

Intitally, value=10 when it was declared.

Then we added 5 and it become value=15

then we used fork() function which creates a parent(orignal) and child(duplicate)

When fork() succeeds it returns the child pid to parent and returns 0 to the child. As you can see (pid > 0) condition is always true therefore the parent pid value becomes 35 ( 15+20) and the child pid value becomes 0.

#include <stdio.h>

#include <unistd.h>

int main( ) {

   int value = 10;

     printf("%d\n",value);

   int pid;

   value += 5;

     printf("%d\n",value);

   pid = fork( );

     printf("%d\n",pid);

   if (pid > 0 )

   {

       value += 20;

   }

   printf("%d\n",value);

   return 0;

}

Output:

10 (initial value)

15 (modified value)

5343 (pid when fork is used)

35 (final modified value)

0 (child value)

15 (the parent value when fork was used)

8 0
4 years ago
(PYTHON) Write a program that uses this technique to read a CSV file such as the one given above. Display the IDs and names of t
Ludmilka [50]

Answer:

import csv

with open('employee_birthday.txt') as csv_file:

csv_reader = csv.reader(csv_file, delimiter=',')

line_count = 0

for row in csv_reader:

if line_count == 0:

print(f'Column names are {", ".join(row)}')

line_count += 1

else:

print(f'\t{row[0]} works in the {row[1]} department, and was born in {row[2]}.')

line_count += 1

print(f'Processed {line_count} lines.')

Explanation:

Heres an example of how to read csvs

7 0
3 years ago
Create a class named Apartment that holds an apartment number, number of bedrooms, number of baths, and rent amount. Create a co
Archy [21]

Solution:

public class Apartment {

int aptNumber;

int bedrooms;

double baths;

double rent;

public Apartment(int num, int bdrms, double bths, double rent) {

aptNumber = num;

bedrooms = bdrms;

this.baths = bths;

this.rent = rent;

}

public int getAptNumber() {

return aptNumber;  

}

public int getBedrooms() {

return bedrooms;  

}  

public double getBaths() {  

return baths;  

}  

public double getRent() {  

return rent;  

}  

}  

import java.util.*;  

public class TestApartments {

public static void main(String args[]) {  

Scanner input = new Scanner(System.in);  

Apartment apts[] = new Apartment[5];

apts[0] = new Apartment(101, 2, 1, 725);

apts[1] = new Apartment(102, 2, 1.5, 775);

apts[2] = new Apartment(103, 3, 2, 870);

apts[3] = new Apartment(104, 3, 2.5, 960);  

apts[4] = new Apartment(105, 3, 3, 1100);  

int bdrms;

int baths;

double rent;

int count = 0;  

System.out.print("Enter minimum number of bedrooms needed >> ");

bdrms = input.nextInt();

System.out.print("Enter minimum number of bathrooms needed >> ");

baths = input.nextInt();  

System.out.print("Enter maximum rent willing to pay >> ");  

rent = input.nextDouble();  

System.out.println("\nApartments meeting citeria of\nat least " + bdrms + " bedrooms, at least " + baths + " baths, and " + " no more than $" + rent + " rent:");

// Write your code here

boolean isExist = false;

for(int i=0; i<apts.length; i++){

if(checkApt(apts[i], bdrms, baths, rent)){  

display(apts[i]);

isExist = true;  

}  

}  

if(!isExist){  

System.out.println("No apartments met your criteria");

}  

}  

public static boolean checkApt(Apartment apt, int bdrms, double baths, double rent) {

// Write your code here  

if(apt.getBedrooms()>=bdrms && apt.getBaths()>=baths && apt.rent<=rent)  

return true;  

return false;

}  

public static void display(Apartment apt) {

System.out.println(" Apt #" + apt.getAptNumber() + " " + apt.getBedrooms() +" bedrooms, and " + apt.getBaths() + " baths. Rent $" + apt.getRent());  

}  

}  

7 0
4 years ago
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