Ask question

Ask question

All categories

erma4kov [3.2K]

3 years ago

5

C++ a. Write a program that uses the function isPalindrome given in example 6-6 (Palindrome). Test your program on the followinn

g strings: "madam", "abba", "22", "67876", "444244", and "trymeuemyrt" b. Modify the function isPalindrome of example 6-6 so that when determining weather a string is a palindrome, cases are ignored, that is, uppercase and lowercase letters are considered the same. Example 6-6: bool isPalindrome (string str) { int length = str.Length(); for (int i = 0; i < length / 2; i++) if (str[i] != str[length - 1 - i]; return false; return true; }

Computers and Technology

1 answer:

Whitepunk [10]3 years ago

5 0

Answer:

#include <iostream>

#include <array>

using namespace std;

bool isPalindrome(string str)

{

int length = str.length();

for (int i = 0; i < length / 2; i++)

if (toupper(str[i]) != toupper(str[length - 1 - i]))

return false;

return true;

}

int main()

{

array<string, 6> tests = { "madam", "abba", "22", "67876", "444244", "trymEuemYRT" };

for (auto test : tests) {

cout << test << " is " << (isPalindrome(test) ? "" : "NOT ") << "a palindrome.\n";

}

}

Explanation:

The toupper() addition forces characters to uppercase, thereby making the comparison case insensitive.

You might be interested in

Find the inverse function of f(x)= 1+squareroot of 1+2x

Svetllana [295]

Answer:

Therefore the inverse function of $f(x)=1+\sqrt{1+2x}$ is $\frac{x^2-2x}{2}$

Explanation:

We need to find the inverse of function $f(x)=1+\sqrt{1+2x}$

Function Inverse definition :

$\mathrm{If\:a\:function\:f\left(x\right)\:is\:mapping\:x\:to\:y,\:then\:the\:inverse\:functionof\:f\left(x\right)\:maps\:y\:back\:to\:x.}$

$y=1+\sqrt{1+2x}$ $\mathrm{Interchange\:the\:variables}\:x\:\mathrm{and}\:y$

$x=1+\sqrt{1+2y}$

$\mathrm{Solve}\:x=1+\sqrt{1+2y}\:\mathrm{for}\:y$

$\mathrm{Subtract\:}1\mathrm{\:from\:both\:sides}$

$1+\sqrt{1+2y}-1=x-1$

Simplify

$\sqrt{1+2y}=x-1$

$\mathrm{Square\:both\:sides}$

$\left(\sqrt{1+2y}\right)^2=\left(x-1\right)^2$

$\mathrm{Expand\:}\left(\sqrt{1+2y}\right)^2:\quad 1+2y$

$\mathrm{Expand\:}\left(x-1\right)^2:\quad x^2-2x+1$

$1+2y=x^2-2x+1$

$\mathrm{Subtract\:}1\mathrm{\:from\:both\:sides}$

$1+2y-1=x^2-2x+1-1$

$\mathrm{Simplify}$

$2y=x^2-2x$

$\mathrm{Divide\:both\:sides\:by\:}2$

$\frac{2y}{2}=\frac{x^2}{2}-\frac{2x}{2}$

$\mathrm{Simplify}$

$y=\frac{x^2-2x}{2}$

Therefore the inverse function of $f(x)=1+\sqrt{1+2x}$ is $\frac{x^2-2x}{2}$

4 0

3 years ago

steposvetlana [31]

Answer:

1. False

2. False

3. True

4. False

Explanation:

1. Folders are the containers to store files

2. The delete option deletes the file

3. Files are moved to recycle bin after being deleted, and can be permanently deleted from recycle bin

4. "MS-DOS was the main operating system for IBM PC compatible personal computers during the 1980s, from which point it was gradually superseded by operating systems offering a graphical user interface (GUI), in various generations of the graphical Microsoft Windows operating system."

<em>source for #4: Wikipedia</em>

3 0

3 years ago

Which game would be classified as an educational game

Masja [62]

Answer:

The various game types can be like board, video and card games. As far as educational video games are concerned they are made to explain to us some of the subjects which can be specific, as well as to teach a certain set of skills like role-playing. They are the interactive play that can help us learn the rules, goals, techniques to solve the problems. adaptation quality, as well as interactions, and all of these are being narrated in the form of a story. You should know that each game is a story in reality, and always. One can think of many such games, and like action games based on the military helps us learn how to fight a war.

Explanation:

Please check the answer.

7 0

3 years ago

Design and implement a set of classes that define various types of reading material: books, novels, magazines, technical journal

tino4ka555 [31]

Answer:

Following are the code to this question:

please find the attached file.

Explanation:

In this code, four class "novels, magazines, technical journals, and textbooks", is defined, in which it holds their respective default constructor and the get and set method to hold the string and integer value, and in the book class the main method is defined, that creates its object and a switch to for search value and print its value.

6 0

3 years ago

In order to consolidate your theoretical knowledge into technique and skills with practical and applicational value, you will us

Arisa [49]

Answer:

Check the explanation

Explanation:

Lasso: R example

To run Lasso Regression you can re-use the glmnet() function, but with the alpha parameter set to 1.

# Perform 10-fold cross-validation to select lambda --------------------------- lambdas_to_try <- 10^seq(-3, 5, length.out = 100) # Setting alpha = 1 implements lasso regression lasso_cv <- cv.glmnet(X, y, alpha = 1, lambda = lambdas_to_try, standardize = TRUE, nfolds = 10) # Plot cross-validation results plot(lasso_cv)

Best cross-validated lambda lambda_cv <- lasso_cv$lambda.min # Fit final model, get its sum of squared residuals and multiple R-squared model_cv <- glmnet(X, y, alpha = 1, lambda = lambda_cv, standardize = TRUE) y_hat_cv <- predict(model_cv, X) ssr_cv <- t(y - y_hat_cv) %*% (y - y_hat_cv) rsq_lasso_cv <- cor(y, y_hat_cv)^2 # See how increasing lambda shrinks the coefficients -------------------------- # Each line shows coefficients for one variables, for different lambdas. # The higher the lambda, the more the coefficients are shrinked towards zero. res <- glmnet(X, y, alpha = 1, lambda = lambdas_to_try, standardize = FALSE) plot(res, xvar = "lambda") legend("bottomright", lwd = 1, col = 1:6, legend = colnames(X), cex = .7)

Kindly check the Image below.

5 0

3 years ago