Softwaredevelopmentapproaches(viewsandopinions).pptVIP

Software development approaches(views and opinions) Bjarne Stroustrup ATT Labs – Research /~bs My perspective Researcher Research manager Programmer/designer Teacher Consultant (not on a fee basis) C/C++ community Unix/Windows Systems programming / embedded systems Not primarily IT Production Applications Overview Generalities Tool chains Project-focused discussion Programming techniques C++ based (that’s what I know best) Standards Everybody got a few So what can we do to make progress? (provocative horror show – it’s Halloween) Generalities Our civilization runs on computers More and more of a computer is software More and more of our environment contain computers We need More software Built in less time More reliable With more “features” “High tech” v.s. “Cheap labor” Curious trends: lots of “tech” with expensive labor Because software is crucial, money talks (shouts!) Makes it hard to make technical decisions Communities The software development community has fractured Web designers VB programmers Analysts/designers Traditional skilled programmers C/free-software hackers Academic FP-community Licensed company X internals specialists … These groups don’t understand each other’s languages, tools, and work methods Each group has sub-groups who don’t understand each other’s languages, tools, and work methods E.g. C, C++, Java, Ada This is not just specialization Tower of Babel Modularity and communication “separating things are easy” It’s having separate entities communicate that’s hard Have “reuse” succeeded or failed? Certainly the hype was wrong (surprise!) Huge components Compilers, operating systems, communications packages Tiny components subroutines Medium-sized components This is where it gets interesting/difficult Plug-ins, some CORBA objects, some COM components, libraries Buzzwords “Objects” are not everything (I promised you that they wouldn’t be ?) Are useful in their proper roles IDLs (Interface Definition Languages) Try to become systems developmen