{"id":7345,"date":"2014-04-21T05:08:21","date_gmt":"2014-04-20T19:08:21","guid":{"rendered":"http:\/\/www.rjmprogramming.com.au\/wordpress\/?p=7345"},"modified":"2014-04-21T05:08:21","modified_gmt":"2014-04-20T19:08:21","slug":"c-stdvector-primer-tutorial","status":"publish","type":"post","link":"https:\/\/www.rjmprogramming.com.au\/ITblog\/c-stdvector-primer-tutorial\/","title":{"rendered":"C++ std::vector Primer Tutorial"},"content":{"rendered":"
\"C++<\/a>

C++ std::vector Primer Tutorial<\/p><\/div>\n

Today we answer a Yahoo Answers question<\/a> (thanks) to point out an advantage C++ std::vector “container” datatype has over a base array datatype. We use Xcode (on a Mac laptop) as our IDE for this work.<\/p>\n

Read more here<\/a> about std::vector but let’s quote from that same useful link (thanks) where we define std::vector as “sequence containers representing arrays that can change in size”. And that is the essence of today’s first bit of code that reads a very simple text file containing two integer numbers of ranges of numbers between which we find a list of prime numbers.<\/p>\n

Are you into syntax? Does “template < class T, class Alloc = allocator > class vector; <\/i>” (via that same previous link) turn you on? Hmmmmmmm. Seriously though, syntax is good to learn well, so that you don’t have to look back at books (because, rest assured, they’re looking back at you with a kind of dumb stupid look) or other reference stuff all the time.<\/p>\n

So we have a progression … and regression … of code below:<\/p>\n