List of all available Websheets
Viewing cpp/cs103/hw-recursion/rec_sum by daveagp@gmail.com. You have unsaved changes. Log in above to create, edit, preview and publish Websheets.
Property | Value |
---|---|
Description html markup shown to student | Define a recursive function <tt>int sum_up_to(int n)</tt> that computes the sum of the first <tt>n</tt> integers without using a loop. <br> E.g. <tt>sum_up_to(3)</tt> is 1+2+3 which is 6. |
Engine | |
Template / Reference solution |
using namespace std; int sum_up_to(int n) { // base case, nothing to add if (\[ REDACTED ]\) return \[ REDACTED ]\; else { // make a recursive call to n-1 int rec_result = \[ REDACTED ]\; // add the missing number int total = \[ REDACTED ]\; // return the total return \[ REDACTED ]\; } } int main() { int n; cin >> n; cout << sum_up_to(n); } |
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": "3"}, {"stdin": "4"}, {"stdin": "1"}, {"stdin": "100"} ] |
Forbidden substrings json list of strings e.g. ["for","while"] | ["#include", "for", "while", "*"] |
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'.