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Do you know how to use MPW?

Posted on 1998-11-18
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Last Modified: 2013-12-26
please refer to my previously asked question:

How the #*&?!! do I learn C?

as this is a continuation of that same theme.  actually, i’m trying to make myself a little clearer and hopefully get the info i really need.

my main problem is that i cannot try out programs on my mac.  i have mpw--and therefore a c and c++ compiler (mrc and mrcp).  i should be able to follow along with the online c tutorials, but i don't know how to use the compiler well enough and don't know how to run my programs.

i have been able to run one program now (yea, it’s hello world), but did not really understand what i was doing (the compiling part--the c lang. part was easy).  i had to create a makefile and then build a tool--i think.  actually i composed my c program in a new window, saved it as hello.c, chose “create build commands...” from the build menu selecting “tool” instead of “application” (tool was they key, why didn’t the “beginner’s” notes say anything about it?), and then chose “build” from the build menu.  after that i could type “hello” from the command line and “hello world” would spit out on the next line.

so, i need to learn to write and compile c programs within the MPW framework.  maybe the tool thing was the key and i’ll be able to progress on my own now.  but this morning i read over a tutorial that told me i should be using <stdin> instead of <stdio>.  was this a typo?  lots of the stuff i’ve read say that compilers have their own little perks and expectations of the programmer.  i need to know what those particulars are for MPW.  if you can give me even a small number of those key issues, i’d be very, very happy.

oh...please don’t give me any urls out of apple.com.  i’ve thoroughly checkout their programming links and have all their docs--they don’t help.  i guess apple never budgeted for good writers.
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Question by:heathenchild
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boonstra earned 200 total points
ID: 1291597
The MPW documentation really isn't intended to teach you C.  For that, you ought to check out one of the many books on the subject.  One Macintosh-specific example is "Macintosh C Programming Primer, Vol I, by Dave Mark.  It isn't MPW-specific, but it will teach "C" on the Mac.  Another good online tutorial with demo apps is at:
<http://cafe.AmbrosiaSW.com/macintosh-c/>

MPW comes with a set of examples, though, and you can learn a lot from them.  Follow the path {MPW}:Examples:CExamples (where "{MPW}" is your MPW home directory.  Check out the file "Instructions" - it tells you how to go about building any one of the eight example programs.

The difference between a tool and an application is that a tool runs within MPW - you execute it by typing its name on the command line Unix-style.  An example of that is the "Count" program.

An application is a stand-alone program.  The SillyBalls example is one of these, as is the TESample (although that is too complicated to start with).  The reason the docs didn't point you to writing a tool is that most people, in fact, start with writing an application.

With respect to your stdio vs stdin question, they are different things.  stdio is a header file, and it includes the definitions to the routines associated with printing.  You want a line like
    #include <stdio.h"
in your program if you want to read from or print to files.  stdin is the standard input file, and is the thing you would actually read from.  So you would have code like
    fscanf(stdin,"%d",&inputVariable)
to read an integer into inputVariable.  (Of course, you would probably use the shorthand
    scanf("%d",&inputVariable)
to read from stdin, and save fscanf to read from a file on disk.

It doesn't sound to me like you have reached the point where any quirks of the MPW compilers are your problem.  Your issues seem to be the build process (MPW uses make files, analagous to what Unix does, instead of a GUI environment, like CodeWarrior).

Hope this helps some.  If you have more specific questions, I'll try to answer them.
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