live range c program

[Nuno1714]

hi!

i'm a new linux user and a i'm trying to learn how to program in c too.
can somebody help me about a program that returns the live range of the variables?
i'm a little confused about the syntax and don't know what to put in the makefile to return this.

thanks, nuno

[gerard4143]

a program that returns the live range of the variables?

What's a live range of variables?...Gerard4143

Maybe if you gave us/me an example...

[Nuno1714]

thanks for the fast reply..

imagine you have a function with many variables like: d = (a - b) / (c - d) - 2 * (b + 7) / 3,
so you divide it in parts..

LINE1 live: a c b d
LINE2 u = a - b
L3 v = c - d
L4 w = u / v
L5 c = b + 7
L6 y = c / 3
L7 z = 2 * y
L8 d = w - z
L9 live: d

what I mean is that my program would have a output like
a 1 2
b 1 5
c 1 6
...
so the output is (char, live in, live out). it's the first line a variable appears and the last one. i heard about something, a C3E file?

sorry my bad english, i'm portuguese.

thanks

[gerard4143]

Are you talking about expression parsing? If you are here's a link:

http://www.engr.mun.ca/~theo/Misc/exp_parsing.htm