Comment by segfaultbuserr

Here's a stupid but somewhat relevant case: Recently, I saw a surprisingly insidious variation of the "FizzBuzz" question in C. Like the usual FizzBuzz, but with a twist: You are required to return your answer as "char (star)" with a separator "\n", the memory should be allocated dynamically, assuming the user calls free(). A naive implementation that strcat() / realloc() the string and repeats it a thousand times, a better solution is to overestimate the required memory and malloc(). Adding a different constraint can make the question quickly become effectively "reimplement std::vector in C", and in real applications, something like this occurs daily, all C programmers have their own standard library, so I guess C++ is at least useful for its standard library...