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Lynna [10]
2 years ago
14

Two devices used by the supermarket point-of-sale (POS) terminal are a bar code reader and a keyboard. Name two other input/outp

ut devices used at the POS and give a use for each device.
Computers and Technology
1 answer:
Svetllana [295]2 years ago
6 0

Answer:

1. Receipt printer

Use of receipt printer:

i. They are used to print customer transaction receipts for proof.

2. Touch screen monitor

Use of touch screen monitor:

i. Allow record of when, where, price, and other important information about the sale conducted.

Explanation:

A Point of sale (POS) terminal takes record of transactions at the point where a product is purchased or a service is rendered. A barcode reader is a price scanner that is an input device used in a point-of-sale (POS) terminal. The keyboard is also an input device. The receipt printer is an output device since it converts information into a readable format. While only a touch screen monitor among the other devices mentioned above is an input and output device, because of its touch panel and its ability to display information.

             

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3 years ago
Write the definition of a function named newbie that receives no parameters and returns true the first time it is invoked (when
kondaur [170]

Answer:

The function definition to this question can be described as follows:

bool newbie() //defining a bool method newbie

{

static bool y = true ; // defining a static bool variable y and assign value true

bool t1=y; //defining bool variable t1 and assign value of variable y

y=false; // assigning value in variable y

return t1; // return value of variable t1

}

Explanation:

The program to this question can be described as follows:

Program:

#include <iostream> //defining header file

using namespace std;

bool newbie() //defining a bool method newbie

{

static bool y = true ; // defining a static bool variable y and assign value true

bool t1=y; //defining bool variable t1 and assign value of variable y

y=false; // assigning value in variable y

return t1; // return value of variable t1

}

int main() //defining main method

{

int s,s1; //defining integer variable s,and s1

s=newbie(); // variable s that call method

cout<<s<<endl; //print value

s1=newbie();//variable s that call method

cout<<s1;  //print value

return 0;

}

Output:

1

0

Description:

The description of the above function can be described as follows:

  • In the above method definition a boolean method "newbie" is declared, which can't accept any parameters, inside the method, two boolean variable "y and t1" is declared.
  • In this variable, variable y is a static boolean variable, that assigns a true value, and in t1 variable, we hold static variable value.  
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  • In the next step, the main method is declared, inside these two integer variable s, s1 is declared, that calls a method, and prints it value in the first time, it will print 1, that means the false and second time it will print 0, that means false.
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