argc and argv are both const so you cannot modify them.
You could call main() again with your own argc and argv buffers. This is generally a bad aproach because 1) it's not common practice, and 2) it duplicates all the variables in main().
The better aproach is not to read from argc/v, but to store the arguements into your own strings. If no arguements are given, then default to read them from a file.
It is too clear and so it is hard to see.
A dunce once searched for fire with a lighted lantern.
Had he known what fire was,
He could have cooked his rice much sooner.
"If no arguements are given, then default to read them from a file."
This is exactly what I'm tring to do...hence
the if (argc==1) statement. Am I not getting something?
and my while(fgets(arg,MAX_PATH,file)!=NULL) stores the arguments from the file into variable char arg[]. Now I dont know where to go from here. Im new to c programming and have had no experience with command line arguments. If im doing something incorrectly are poorly please correct me.
sorry if my question was not stated clearly..
Last edited by g1i7ch; 06-21-2006 at 06:19 PM.
No they're not. Yes you can.Originally Posted by King Mir
C: A Reference Manual; 5th ed.
Page 303
When arguments are declared, those arguments are set up by the execution enviorn-
ment and are not directly under control of the C programmer. The parameter argc is the
count of the number of "program arguments" or "options" supplied to the program when it
was invoked by a user or another program. The parameter argv is a vector of pointers to
strings representing the program arguments. The first string, argv[0], is the name of the
program; if the name is not available, argv[0][0] must be '\0'. The string argv[i],
for i=1, ..., argc-1, is the ith program argument. Standard C requires that argv[argc]
be a null pointer, but not so in some older implementations. The vector argv and the
strings to which it points must be modifiable, and their values must not be changed by the
implementation or host system during program execution. If the implementation does not
support mixed-case strings, then the strings stored in argv must be in lower case.
Quzah.
Hope is the first step on the road to disappointment.
Ok, after the code Ive posted dont I need to set the argc=sizeof(arg) and argv = arg or something. cuz I am lost after I open and read in the arguments into char arg[]
my txt file has 1 line and looks like this :
-b -s 999
but could have more arguments in it i.e.
-b -B 999 -s -vv -R
printf(arg) looks just like the txt file,this is a good thing
I dont know how to set argc and argv = to my char arg[] that contains the argument list.
