cpp/cs102/practice11/reversal Source

Viewing cpp/cs102/practice11/reversal by redekopp@usc.edu. You have unsaved changes. Log in above to create, edit, preview and publish Websheets.

Property Value

Description
html markup
shown to student

Your friend tells you that she's disappointed that "palindrome", a word or phrase that is the same backwards and forwards, is not itself a palindrome.
Words such as "Bob" or "Taco cat" are palindromes.
However, "palindrome" is an "emordnilap", which is a recently coined word that denotes a word or phrase that creates another word backwards (such as "dog"
and "god" or "desserts" an "stressed".
You decide to write a program that automatically reverses a string of up to 50 characters and prints out the result. Use arrays to reverse up to 50
characters and print them back to the screen. Assume there are no spaces.

Epilogue
html markup
shown when solved

remove
Public permissions remove
Remarks
Comments, history, license, etc.

Copied from problem cpp/cs102/practice10/netflixTimes (author: jmell@usc.edu)
Copied from problem cpp/cs102/practice9/forCapitalization (author: jmell@usc.edu)
Copied from problem cpp/cs102/practice8/for1 (author: jmell@usc.edu)
Copied from problem cpp/cs102/practice7/whileMC1 (author: jmell@usc.edu)

remove
Engine
Choices
json list of string, bool pairs
e.g. [["good", true], ["bad", false]]

Correct answer
Template / Reference solution

Template / Reference solution

#include <iostream>

using namespace std;

int main(){
char buffer[50];
cout<<"Enter a string to be reversed:"<<endl;

//size as a variable is needed here because you don't know, a priori, how much of buffer will be filled
//you will later learn a way to measure the size of an array directly, but don't worry about that here.
int size = 0;
for(int i = 0; cin>>buffer[i]; i++)
{
size++;
}
// What do you need to add to the end of the array?
\[ REDACTED ]\

char reversedbuffer[50];

// Reverse the buffer from the buffer array into the reversedbuffer array
// Don't forget what you need to add to the end of the reversedbuffer array
\[
REDACTED
]\

cout<<"reversed string:";

// Print out the string (don't use a loop if you can help it)
// Don't print a newline (endl)...we'll do that ourselves.
\[
REDACTED
]\

cout << endl;

return 0;
}

Java test suite
See manual

C++ test suite
json list of stdin/args tests
e.g. [{"stdin":"hi", "args":["4", "5"]}, {"stdin":"noargs"}]
to just run once with no input use [{}]

[
{"stdin":"desserts", "args":[]},
{"stdin":"abcdefghijklmnopqrstuvwxyz", "args":[]},
{"stdin":"emosewa", "args":[]},
{"stdin":"amanaplanacanalpanama", "args":[]}
]
C++ test suite
See manual

Forbidden substrings
json list of strings
e.g. ["for","while"]

remove
Solution visibility remove
Java imports
json list of importables
e.g. ["java.util.*"]

remove
Override Java classname
else defaults to
websheet name
remove
Dependent on other websheets?
json list of websheet names in this folder
e.g. ["DataStructure"]

remove
Is example?
i.e., just a demo
remove
Add compiler flag(s)
json list of flags
e.g. ["-Wno-unused-variable"]

remove
Remove default compiler flag(s)
json list of flags
see default_cppflags
e.g. ["-Wno-write-strings"]

remove

Property	Value
Description html markup shown to student	<p>Your friend tells you that she's disappointed that "palindrome", a word or phrase that is the same backwards and forwards, is not itself a palindrome. Words such as "Bob" or "Taco cat" are palindromes.</p> <p>However, "palindrome" is an "emordnilap", which is a recently coined word that denotes a word or phrase that creates another word backwards (such as "dog" and "god" or "desserts" an "stressed".</p> <p>You decide to write a program that automatically reverses a string of up to 50 characters and prints out the result. Use arrays to reverse up to 50 characters and print them back to the screen. Assume there are no spaces.</p>
Epilogue html markup shown when solved	remove
Public permissions	remove
Remarks Comments, history, license, etc.	Copied from problem cpp/cs102/practice10/netflixTimes (author: jmell@usc.edu) Copied from problem cpp/cs102/practice9/forCapitalization (author: jmell@usc.edu) Copied from problem cpp/cs102/practice8/for1 (author: jmell@usc.edu) Copied from problem cpp/cs102/practice7/whileMC1 (author: jmell@usc.edu) remove
Engine
Choices json list of string, bool pairs e.g. `[["good", true], ["bad", false]]`
Correct answer
Template / Reference solution
Template / Reference solution	#include <iostream> using namespace std; int main(){ char buffer[50]; cout<<"Enter a string to be reversed:"<<endl; //size as a variable is needed here because you don't know, a priori, how much of buffer will be filled //you will later learn a way to measure the size of an array directly, but don't worry about that here. int size = 0; for(int i = 0; cin>>buffer[i]; i++) { size++; } // What do you need to add to the end of the array? \[ REDACTED ]\ char reversedbuffer[50]; // Reverse the buffer from the buffer array into the reversedbuffer array // Don't forget what you need to add to the end of the reversedbuffer array \[ REDACTED ]\ cout<<"reversed string:"; // Print out the string (don't use a loop if you can help it) // Don't print a newline (endl)...we'll do that ourselves. \[ REDACTED ]\ cout << endl; return 0; }
Java test suite See manual
C++ test suite json list of stdin/args tests e.g. `[{"stdin":"hi", "args":["4", "5"]}, {"stdin":"noargs"}]` to just run once with no input use `[{}]`	[ {"stdin":"desserts", "args":[]}, {"stdin":"abcdefghijklmnopqrstuvwxyz", "args":[]}, {"stdin":"emosewa", "args":[]}, {"stdin":"amanaplanacanalpanama", "args":[]} ]
C++ test suite See manual
Forbidden substrings json list of strings e.g. `["for","while"]`	remove
Solution visibility	remove
Java imports json list of importables e.g. `["java.util.*"]`	remove
Override Java classname else defaults to websheet name	remove
Dependent on other websheets? json list of websheet names in this folder e.g. `["DataStructure"]`	remove
Is example? i.e., just a demo	remove
Add compiler flag(s) json list of flags e.g. `["-Wno-unused-variable"]`	remove
Remove default compiler flag(s) json list of flags see default_cppflags e.g. `["-Wno-write-strings"]`	remove

Optional properties:

Note: problems are open-source by default (see 'Public permissions'). Assumed license for open problems is Creative Commons 4.0 Attribution-ShareAlike unless specified in 'Remarks'.