A computer may keep freezing if it's software is up-to-date? True False

A “greedy algorithm” sometimes works well for optimization problems???

mrs_skeptik [129]

An optimization problem is one in which you want to find, not just a solution, but the best solution •A “greedy algorithm” sometimes works well for optimization problems •But only a few optimization problems can be solved by the greedy method

5 0

3 years ago

Isabel and Jared work for the same company but in different departments. Their workstations are both part of the company's compu

Nina [5.8K]

Network access limitations implemented from their local IT Department

3 0

3 years ago

Read 2 more answers

Why are most minicomputers no longer used

Svet_ta [14]

Answer:

Minicomputers are used for scientific and engineering computations, business-transaction processing, file handling, and database management, and are often now referred to as small or midsize servers.

Explanation:

Minicomputers are used for scientific and engineering computations, business-transaction processing, file handling, and database management, and are often now referred to as small or midsize servers.

Minicomputers are used for scientific and engineering computations, business-transaction processing, file handling, and database management, and are often now referred to as sma

7 0

4 years ago

If my 98 dodge ram 1500 truck is dropping RPM's when i stop does that mean i need new throttle body sensors or does it mean i ne

geniusboy [140]

You might need a new 02 sensor and i really dont know about the vacuum leak.

6 0

3 years ago

Read 2 more answers

Today we will be making a Caesar Cipher to encrypt and decrypt messages.A Caesar Cipher is a simple cipher that translates one l

Len [333]

Answer:

#include <iostream>

#include <stdio.h>

#include <ctype.h>

using namespace std;

string

encrypt (string text, int s)

{ string resultingString = "";

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

{ if (!isspace (text[i]))

{

if (isupper (text[i]))

resultingString += char (int (text[i] + s - 65) % 26 + 65);

else

resultingString += char (int (text[i] + s - 97) % 26 + 97);

}

else

{

resultingString += " ";

}

return resultingString;

}

string

decrypt (string text, int s)

{

string resultingString = "";

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

{

if (!isspace (text[i]))

{

if (isupper (text[i]))

resultingString += char (int (text[i] + s - 65) % 26 + 65);

else

resultingString += char (int (text[i] + s - 97) % 26 + 97);

}

else

{

resultingString += " ";

}

return resultingString;

}

string upper(string str){

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

str[i]=toupper(str[i]);

}

return str;

}

int

main ()

{

string text = "This is test text string";

int s = 3;

string cipherText = "";

string decipherText = "";

int menu=-1;

while (menu!=3){

cout<<"1. Encrypt"<<endl;

cout<<"2. Decrypt"<<endl;

cout<<"3. Exit"<<endl;

cin >>menu;

cin.ignore();

if(menu==1){

cout<<"Enter Plain string "<<endl;

getline(cin,text);

text=upper(text);

cipherText = encrypt (text, s);

cout << "cipher text: " << cipherText << endl;

}

else if(menu==2){

cout<<"Enter Encrypted string "<<endl;

getline(cin,cipherText);

cipherText=upper(cipherText);

decipherText = decrypt (cipherText, 26 - s);

cout << "decipher text: " << decipherText << endl;

}

else {

cout<<"Not valid"<<endl;

}

return 0;

}

Explanation:

Display menu with options 1 encrypt, 2 decrypt, 3 exit. Write a function to translate string to upper case. Iterate through string and for each index use toupper function to translate alphabet to upper case and store it back to current index of string.On exiting from loop return string. Pass upper case string to encrypt function.

In encrypt function pass string by reference and shift value. Create an empty string resultingString. Iterate through string for each character check if its space, if its a space add it to resulting string otherwise using ascii values convert char to its ascii add shift value and subtract 65 (staring ascii value for capital alphabet) take modules with 26 for new character and than add 65 to get alphabet.Now add this alphabet to resulting string. Upon loop completion return resultingString.

For decryption use same function as encryption. We are using cyclic property to decrypt using same function therefor subtract shift from 26 and pass resulting shift value to decrypt function.

8 0

3 years ago