cpp/conditionals/stoplight Source

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Property Value

Description
html markup
shown to student

Ask the user to indicate what color a traffic light is. The user
should type <tt>r</tt> for red and <tt>g</tt> for green. Output
<tt>Stop!</tt> or <tt>Go!</tt> appropriately.

Epilogue
html markup
shown when solved

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Remarks
Comments, history, license, etc.

Copied from problem cpp/conditionals/nestedec (author: redekopp@usc.edu)
Copied from problem cpp/conditionals/extracredit (author: redekopp@usc.edu)
Copied from problem cpp/control/flag (author: daveagp@gmail.com)

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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 main() {
char color;
cout << "What color is the traffic light?" << endl;
cin >> color;
string result;

\[
if(color == 'r')
{
result = "Stop!";
}
else
{
result = "Go!";
}
]\
cout << result << 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": "r", "args": ""},
{"stdin": "g", "args": ""}
]

C++ test suite
See manual

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

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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"]

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

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Property	Value
Description html markup shown to student	Ask the user to indicate what color a traffic light is. The user should type <tt>r</tt> for red and <tt>g</tt> for green. Output <tt>Stop!</tt> or <tt>Go!</tt> appropriately.
Epilogue html markup shown when solved	remove
Public permissions	remove
Remarks Comments, history, license, etc.	Copied from problem cpp/conditionals/nestedec (author: redekopp@usc.edu) Copied from problem cpp/conditionals/extracredit (author: redekopp@usc.edu) Copied from problem cpp/control/flag (author: daveagp@gmail.com) 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 color; cout << "What color is the traffic light?" << endl; cin >> color; string result; \[ if(color == 'r') { result = "Stop!"; } else { result = "Go!"; } ]\ cout << result << 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": "r", "args": ""}, {"stdin": "g", "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

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