Cody

Problem 42248. Return fibonacci sequence do not use loop and condition version 3

Solution 1666045

Submitted on 5 Nov 2018
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Test Suite

Test Status Code Input and Output
1   Fail
% !/bin/cp fib.m safe % !/bin/rm *.* % !/bin/mv safe fib.m % Clean user's function from some known jailbreaking mechanisms functions={'!','feval','eval','str2func','str2num','regex','system','dos','unix','perl','assert','fopen','write','save','setenv','path','please','for','if','while','switch','global','figure'... 'round','roundn','fix','ceil','char','floor','\.','^','pow','\^','sscanf','persistent'}; fid = fopen('fib.m'); st = char(fread(fid)'); for n = 1:numel(functions) st = regexprep(st, functions{n}, 'error(''No fancy functions!''); %','ignorecase'); end fclose(fid); fid = fopen('fib.m' , 'w'); fwrite(fid,st); fclose(fid);

Error in solution Line: 25 Column: 1 The function "fib2" was closed with an 'end', but at least one other function definition was not. To avoid confusion when using nested functions, it is illegal to use both conventions in the same file.

2   Fail
n = 2; f = fib(n); assert(isequal(f() + f(),f())); assert(isequal(f(),5));

Error in solution Line: 25 Column: 1 The function "fib2" was closed with an 'end', but at least one other function definition was not. To avoid confusion when using nested functions, it is illegal to use both conventions in the same file.

3   Fail
n = 7; f = fib(n); assert(isequal(f() + f(),f())); assert(isequal(f() + f(),f())); assert(isequal(f(),233));

Error in solution Line: 25 Column: 1 The function "fib2" was closed with an 'end', but at least one other function definition was not. To avoid confusion when using nested functions, it is illegal to use both conventions in the same file.