4.9 Code Practice: Question 4

Answer:

In C++:

#include <iostream>

#include <string>

#include <sstream>

using namespace std;

int main(){

   string lname, fname, stringnum;    int num; string login, pwd;

   cout<<"Last Name: ";    cin>>lname;

   cout<<"First Name: ";    cin>>fname;

   cout<<"Four-digit integer: ";    cin>>num;

   stringnum = to_string(num).substr(0, 4);

   stringstream geek(stringnum);    geek>>num;

   num = num%100;

   pwd = to_string(num);

   if(lname.length()<5){ login = lname + fname.substr(0, 1);    }

   else{ login = lname.substr(0, 5) + fname.substr(0, 1);    }

   cout<<"Login Name: "<<login<<endl;

   cout<<"Password: "<<pwd<<endl;

   return 0;

}

Explanation:

This initializes all the required variables

   string lname, fname, stringnum;    int num;     string login, pwd;

This asks the user for their last name

   cout<<"Last Name: ";    cin>>lname;

This asks for the first name of the user

   cout<<"First Name: ";    cin>>fname;

This prompts for a four-digit number

   cout<<"Four-digit integer: ";    cin>>num;

This converts the number into a string and extracts the first four digits

   stringnum = to_string(num).substr(0, 4);

This changes the string back into an integer

   stringstream geek(stringnum);    geek>>num;

This extracts the last two digits of the four-digit number

   num = num%100;

This generates the user's password

  pwd = to_string(num);

This constructs the user's login name.

This block runs if the last name has fewer than five letters

   if(lname.length()<5){ login = lname + fname.substr(0, 1);    }

This block runs otherwise

   else{ login = lname.substr(0, 5) + fname.substr(0, 1);    }

This displays the login name

   cout<<"Login Name: "<<login<<endl;

This displays the password

   cout<<"Password: "<<pwd<<endl;

Answer:

input price

set change to one hundred minus price

set quarter to change divided by 25

set change to change mod 25

set dime to change divided by 10

set change to change mod 10

set nickel to change divided by 5

set change to change mod 5

set penny to change

print "You acquired an item for price cents and paid me a dollar. Your change is: "

if quarter is equal to 1

print quarter

else if quarter is greater than 1

print quarter with "quarters"

if dime is equal to 1

print dime

else if dime is greater than 1

print dime with "dimes"

if nickel is equal to 1

print nickel

else if nickel is greater than 1

print nickel with "nickels"

if penny is equal to 1

print penny

else if penny is greater than 1

print penny with "pennies"

Explanation:

A clearer way to express the pseudocode above could involve using alternative names for change as:

input price

set change to one hundred minus price

set quarter to change divided by 25

set quarter_remainder to change mod 25

set dime to quarter_remainder divided by 10

set dimes_remainder to quarter_remainder mod 10

set nickel to dimes_remainder divided by 5

set nickel_remainder to dimes_remainder mod 5

set penny to nickel_remainder

print "You purchased an item for" price"cents and provided a dollar. Your change is: "

if quarter is equal to 1

print quarter "quarter"

else if quarter is greater than 1

print quarter "quarters"

if dime is equal to 1

print dime "dime"

else if dime is greater than 1

print dime "dimes"

if nickel is equal to 1

print nickel "nickel"

else if nickel is greater than 1

print nickel "nickels"

if penny is equal to 1

print penny "penny"

else if penny is greater than 1

print penny "pennies"

Next, I will illustrate the pseudocode through an example:

Let's assume price = 75

Thus, change = 100 - price = 100 - 75 = 25

change = 25

quarter = change/25 = 25/25 = 1

quarter = 1

quarter_remainder = change % 25 = 25%25 = 0

dime = 0/10 = 0

At this point, all additional values are 0.

The following message will be displayed on the screen:

You acquired an item for 75 cents and paid me a dollar. Your change is:

Now the program proceeds to the conditional statement

if quarter == 1

This condition holds true because the value of quarter is 1

print quarter "quarter"

Subsequently, this line will appear on the screen:

1 quarter

Thus, the full output of the pseudocode is:

You acquired an item for 75 cents and paid me a dollar. Your change is:

1 quarter

Hello <span>Miyalashay8283
</span>

Question: <span>When your computer runs out of ram, the operating system borrows space from the cpu.

Answer: This statement is untrue.


I hope this information is useful
-Chris</span>

Answer:

The code for the solution is implemented using Python 3.

1. import random
2. import string
4. def simulate_several_key_strikes(l):
5.    char_set = string.ascii_lowercase
6.    return ''.join(random.choice(char_set) for i in range(l))
8. print (simulate_several_key_strikes(10))

Explanation:

This program is designed to create random characters, and the quantity of characters produced is determined by the user's input. Therefore, it is necessary to import the random library (Line 1). Additionally, we incorporate the string module to access its associated method for generating English letters (Line 2).

Then, we define the function simulate_several_key_strikes that accepts one parameter, l. Inside this function, the ascii_lowercase method is utilized to establish the character set of lowercase letters, which is stored in the variable char_set (Line 5). The random.choice method randomly selects a character from char_set, concatenating it with an empty string (Line 6). A for-loop is utilized to produce a total of l characters, generating the final output.

To test the function, we input 10 as an argument, producing a sample output such as:

xuiczuskoj