fopen_s is a “secure” variant of fopen with a few extra options for the mode string and a different method for returning the stream pointer and the error code. It was invented by Microsoft and made its way into the C Standard: it is documented in annex K.3.5.2.2 of the most recent draft of the C11 Standard. Of course it … Read more
std::bitset has a .to_string() method that returns a std::string holding a text representation in binary, with leading-zero padding. Choose the width of the bitset as needed for your data, e.g. std::bitset<32> to get 32-character strings from 32-bit integers. EDIT: Please do not edit my answer for Octal and Hexadecimal. The OP specifically asked for Decimal To Binary.
The error you offer, error: expected initializer before ‘namespace’ suggests that there is a structure or variable declaration that isn’t terminated. Something like: Here, the ‘struct foo’ declaration isn’t terminated with a semicolon. This should read: Getting the preprocessor involved (using #include) makes this type of thing a bit harder to track down. It may be that … Read more
Firstly, you use both ar and arr, while arr is an array and ar is a list. This is both confusing to the reader and (it turns out) to the code author. In C++, std::list doesn’t have random access. You cannot use ar[], since operator[] is not defined for lists. Further, largestOfArray expects an array, not a list. You probably intended to use arr there instead of ar.
You can use IDA Pro by Hex-Rays. You will usually not get good C++ out of a binary unless you compiled in debugging information. Prepare to spend a lot of manual labor reversing the code. If you didn’t strip the binaries there is some hope as IDA Pro can produce C-alike code for you to work with. Usually it is … Read more
From the link above: Several of these types can be modified using the keywords signed, unsigned, short, and long. When one of these type modifiers is used by itself, a data type of int is assumed This means that you can assume the author is using ints.
The != operator serves this purpose for bool values.
What you are asking about is a topic in computer science known as Algorithm Complexity Analysis. It is a very important topic to consider when writing algorithms, or solutions, in your programs because it relates to run-time, or how fast your computations will run. Big-Oh, or O(n) relates to the upper-bound run-time for an algorithm … Read more
Regarding std::priority_queue: A user-provided Compare can be supplied to change the ordering, e.g. using std::greater<T> would cause the smallest element to appear as the top(). Since std::less<T> is the default template argument to the Compare template parameter, it is already a max heap by default. If you want a min heap instead (what the quote above suggest), pass std::greater<T> instead of std::less<T> as the template argument. To summarize: Max Heap: pass std::less<T> (this is the default template … Read more
% is the Modulus operator. For Java Modulus: For example: 10 % 3 is equal to 1. To visually see this – You can think of it as “How much would I have to subtract to the value on the left in order to make it evenly divisible by the right hand value?” And yes, actually it’s … Read more