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I was trying to do the same thing sometime ago. If you want to graph arbitrary functions, you'll have to "parse" the user-given expression. If all you want are simple equations like just +,-,*,/...

You are a heretic and should be shot ;)

Python is an easy langauge to learn, and combines well with C. You can use python for most tasks, and if something can't be done in Python or if it is too slow, you can write that part only in C and...

I've thought, man, I need to learn touch typing.

It should be interrupted from the keyboard(Ctrl-c, for example).

The standard I/O streams are buffered, which means you can't assume that data will be written immediately after the function call....

EOF != '\0' generally; it's usually -1. You should never use the absolute value, though.

Either K or R said something like:
"
It's actually easier to program in a language that doesn't have every feature" ;)

KDE's KDevelop has reference documentation for C and C++ library functions, IIRC.

To that might be added,
Yet Another Buzz Word

Well, to *do* differentiation/integration you certainly need to know trig identities. But just to *understand* the concept of a derivative or integral, you don't need that. Identities can always be...

C++ makes it easier to follow use a programming paradigm called "object oriented programming". C++ is a super-set of C, which means (almost) all C features work exactly the same way. So yes, you...

Believe me, it's not. While it may be powerful, no program is small enough not to use it. It's really simple to use, and gives your app a lot of things for free. I added gnu history support to a...

The order in which arguments to a function are evaluated is not guaranteed. So *never* write code that depends on it.

Perhaps system("foo"); is what you want ?

While it might not be the thing for a beginner, if you at all want to understand C well, you must eventually read the bible, K&R's "The C Programming Language".

GNU grep is available from http://www.gnu.org

One use of unions is to use them as a "generic" type to hold one of many related struct's. For example, the GDK library(a graphics library on top of X) uses a union to hold structs for...

Thanks for pointing that out. However...
From the libc info:


Also, in all the code I've seen, the result is casted.

malloc returns a pointer to a chunk of memory of the requested size. Hence, you must declare a pointer like:

my_struct *m;

and use it to hold the return value. Also, malloc returns a (void *),...