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| subject: | C++ Question |
Hi: I have been using C++ for some time now. As a long-time C programmer, I don't use the object oriented features as much as I might. It seems as though a simple program with no templates, OpenClass objects or containers comes out much larger than it ought to. What I like most about the language is the way it lends itself to grouping related functions. My code looks like C code except I do use cout and cerr all of the time. I've often wondered why a simple program with a main() and one object with four methods (functions to me) needs to be 40K when the same thing in C comes in at 14K. I don't mean a similar thing in C. If you take the C++ object and simply break it down into the four functions and compile the whole works as C code, it comes in a bunch smaller. The size increase with C++ starts with larger .OBJs and more run-time code is linked in, as well. I know that with C, I need to keep each function in it's own source file so that the linker can link in only the functions that it needs. I'm talking about object libraries specifically. C++ seems to get out of hand if you put each method into it's own source file. I've got some pretty big objects (all in one source file -> a .CPP and a .HPP), so I'm guessing that if I instantiate one of these bad boys I get the whole thing regardless of what methods are called in my application. Curiously, I find the performance of C++ to be very near C when I don't use C++ specific features, even though the .EXEs are larger. I don't care about hard disk space, but I would like to code as efficiently as I can. Perhaps someone could shed some light on this, point me to a resource on this subject or, heaven forbid, tell me what I'm doing wrong. So far, my main C++ reference has been Stroustrup's second edition. My compiler is IBM VA C++. BTW, I realize that a more powerful language will tend to generate more .EXE per line of code. With C++ having the capability to be so similar to C though, I can't help but wonder. Thanks in advance. Best wishes, Tom * KWQ/2 1.2g * Liberace was great on the piano, but sucked on the organ. --- GEcho/2 1.20/Pro* Origin: The Green Zone (1:140/23) SEEN-BY: 50/99 270/101 620/243 711/401 409 410 413 430 808 809 934 955 SEEN-BY: 712/407 515 517 628 713/888 800/1 7877/2809 @PATH: 140/23 270/101 712/515 711/808 809 934 |
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