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vitfil [10]
4 years ago
9

Wich of the following was an early image projector? magic lantern a lens light bulb slide show

Computers and Technology
1 answer:
AlexFokin [52]4 years ago
8 0

Answer:

Magic Lantern

Explanation:

Out of all that is given here, the oldest one is Magic Lantern. And others came after this, The Magic Lantern is also known as Lanterna Magica, and is the earliest type projector that used to project images, and which used pictures- paintings, photographs and prints over a transparent plate. And this plate is generally made of glass. And it was firstly developed in the 17th century. And it was chiefly used for entertainment. And in the 19th century, it was being used in the field of education.

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Programming challenge description: Write a program that, given two binary numbers represented as strings, prints their sum in bi
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Answer:

The program to this question can be given as:

Program:

#include<iostream>  //include header file

using namespace std;  

string add(string a, string b)  //define add function

{       //declare variable  

   string result = "";  

   int sum = 0,k,l;      

   cahr x;    

   k= a.size() - 1;

   l = b.size() - 1;  

   while (k>= 0 || l>= 0 || sum == 1) //loop

   {

   //addition 

       sum= sum+ ((k >= 0)? a[k] - '0': 0);  

       sum= sum+ ((l >= 0)? b[l] - '0': 0);

        x=sum%2;

      result=(x+'0') +result;

  // Compute carry

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       // Move to next digits  

       k--;  

       l--;  

   }  

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}

int main()  //main method  

{  

   string a,b;  //string variable

   cout<<"Enter first binary digit: ";  //message.

   cin>>a;     //input from user

   cout<<"Enter Second binary digit: ";  //message.

   cin>>b;     //input from user

   cout <<"Addition :"<<add(a, b)<<endl; //print addition

   return 0;  

}

Output:

Enter first binary digit: 1101

Enter Second binary digit: 100

Addition :10001

Explanation:

In the above c++ program first, we include the header file. Then we define the add function in the add function we add two binary digits by passing value as arguments. In this function, we define a variable that is used on the addition of binary numbers. In this function we define the loop in the loop we check if two binary number is 1 then it will print 0 and pass 1 as the carry. after performing addition it will return value. In the main function, we take two binary numbers from the user and pass the value to the function and print function return value.

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Answer:

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