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Description html markup shown to student	<p>You know the interior angles of a triangle sum to 180 degrees, the angles of a square sum to 360, and so on.</p> <p>In general the sum of degrees for the interior angles of an n-sided polygon is: (n-2) × 180°.</p> <p>Write a program that first asks the user (no prompt needed) for how many sides a polygon has (call this number <em>n</em>. Then let the user enter <em>n</em> integers representing the degrees of each of the n interior angles (no prompt needed). Finally, check whether the angles they have entered sum to the appropriate number of degrees for an n-sided polygon and output: <tt>Correct</tt> or <tt>Incorrect</tt></p> <p><strong>You should use a <tt>for</tt> loop</strong> to sum the angles.</p> ​
Epilogue html markup shown when solved	​ remove
Public permissions	open: anyone can solve, see in listings, see sourceopen: open, but when viewing source, redact solution (default)closed-source, but list publicly and anyone can attempt itclosed-source, and hide from listings (need direct URL to attempt)draft: don't let anyone other than me see this at all remove
Remarks Comments, history, license, etc.	Copied from problem cpp/for/blastoff (author: redekopp@usc.edu) Copied from problem cpp/while/blastoff (author: redekopp@usc.edu) Copied from problem cpp/while/goldilocks (author: redekopp@usc.edu) Copied from problem cpp/while/sum50 (author: redekopp@usc.edu) Copied from problem cpp/conditionals/rps (author: redekopp@usc.edu) Copied from problem cpp/conditionals/taxbrackets (author: redekopp@usc.edu) 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	Select one... (default)JavaC++ (call main with stdin and args)C++ (call functions directly)Multiple true/falseShort answer
Choices json list of string, bool pairs e.g. [["good", true], ["bad", false]]	​
Correct answer
Template / Reference solution	​
Template / Reference solution	#include <iostream> #include <iomanip> using namespace std; ​ int main() { int n; cin >> n; \[ int sum = 0; int angle; for(int i=0; i < n; i++){ cin >> angle; sum += angle; } if(sum == (n-2)*180){ cout << "Correct" << endl; } else { cout << "Incorrect" << 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": "4 90 90 90 90", "args": ""}, {"stdin": "4 70 90 150 90", "args": ""}, {"stdin": "8 135 135 135 135 135 135 135 135", "args": ""}, {"stdin": "5 108 108 108 108 108", "args": ""} ] ​
C++ test suite See manual	​
Forbidden substrings json list of strings e.g. ["for","while"]	​ remove
Solution visibility	AlwaysAfter 1 attemptAfter solving or 2 attemptsAfter solving or 3 attemptsAfter solving or 4 attemptsAfter solving or 5 attemptsAfter solving (default)Never 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	False (default)True 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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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'.