cpp/recursion/countup Source

Viewing cpp/recursion/countup 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

Write a recursive function <tt>countup(int n)</tt> that prints out
<tt>Blastoff!</tt>, followed by the numbers from 1 to n. For example
<tt>countup(5)</tt> should print out
<pre>
Blastoff!
1
2
3
4
5
</pre>

Epilogue
html markup
shown when solved

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

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;

void countup(int n) {
\[
// base case
if (n == 0) {
cout << "Blastoff!" << endl;
}
// recursive case
else {
// recursive call
countup(n-1);

cout << n << endl;
}
]\
}

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 [{}]

C++ test suite
See manual

[
["check-function", "countup", "void", ["int"]],
["call-function", "countup", ["5"]],
["call-function", "countup", ["10"]],
["call-function", "countup", ["1"]]
]

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

["#include", "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	Write a recursive function <tt>countup(int n)</tt> that prints out <tt>Blastoff!</tt>, followed by the numbers from 1 to n. For example <tt>countup(5)</tt> should print out <pre> Blastoff! 1 2 3 4 5 </pre>
Epilogue html markup shown when solved	remove
Public permissions	remove
Remarks Comments, history, license, etc.	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; void countup(int n) { \[ // base case if (n == 0) { cout << "Blastoff!" << endl; } // recursive case else { // recursive call countup(n-1); cout << n << endl; } ]\ }
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 `[{}]`
C++ test suite See manual	[ ["check-function", "countup", "void", ["int"]], ["call-function", "countup", ["5"]], ["call-function", "countup", ["10"]], ["call-function", "countup", ["1"]] ]
Forbidden substrings json list of strings e.g. `["for","while"]`	["#include", "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'.