cpp/cs103/hw-recursion/rec

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Description
html markup
shown to student

Define a recursive function <tt>int rec_len(char* str)</tt>
that computes the length of a C string without using a loop.

Epilogue
html markup
shown when solved

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

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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 rec_len(char* str) {
\[
REDACTED
]\
}

int main() {
char buf[80];
cin.getline(buf, 80);
cout << rec_len(buf);
}

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": "Hi\n"},
{"stdin": "Hello\n"},
{"stdin": "Supercalifragilisticexpialadocious\n"},
{"stdin": "\n(this test case should return 0, the above line is blank)"}
]

C++ test suite
See manual

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

["#include", "for", "while", ".length", "length()"]
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Solution visibility remove
Java imports
json list of importables
e.g. ["java.util.*"]

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

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Is example?
i.e., just a demo
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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	Define a recursive function <tt>int rec_len(char* str)</tt> that computes the length of a C string without using a loop.
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; int rec_len(char* str) { \[ REDACTED ]\ } int main() { char buf[80]; cin.getline(buf, 80); cout << rec_len(buf); }
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": "Hi\n"}, {"stdin": "Hello\n"}, {"stdin": "Supercalifragilisticexpialadocious\n"}, {"stdin": "\n(this test case should return 0, the above line is blank)"} ]
C++ test suite See manual
Forbidden substrings json list of strings e.g. `["for","while"]`	["#include", "for", "while", ".length", "length()"] 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'.