China DOS Union

How can I save data from DOS into variables in C/C++?

For example, the result of dir /b
Or in for %f in (*.txt) do ...., assigning %f to a C/C++ variable

The premise is not using file redirection

C file operations should work

Because there is the argv parameter, it can accept external input, right?
Take a look at how argv is used

Teacher Tan's book should explain it
Or any other C language book should also talk about argv in file operations

That has nothing to do with it, does it?

Originally posted by ssyfzy at 2007-10-14 06:44:
That has nothing to do with it, does it?

Take a look at this!

The command-line parameters argc and argv in C
The command-line parameters argc and argv in C

The command-line parameters argc and argv in C
Keywords: argc,argv
main(int argc,char **argv)
argv is a pointer to a pointer
argc is an integer
char **argv or: char *argv or: char argv
The notation inside the parentheses of main() is fixed.

Here is an example to understand how these two parameters are used:

Suppose the name of the program is prog,

If you only input prog, then the parameters passed by the operating system are:

argc=1, meaning there is only the program name.
argc has only one element, and argv points to the input program path and name: ./prog

If you input prog para_1, there is one parameter, then the parameters passed by the operating system are:

argc=2, meaning that besides the program name there is one more parameter.
argv points to the input program path and name.
argv points to the parameter string para_1.

If you input prog para_1 para_2, there are 2 parameters, then the parameters passed by the operating system are:

argc=3, meaning that besides the program name there are 2 more parameters.
argv points to the input program path and name.
argv points to the parameter string para_1.
argv points to the parameter string para_2.

There may be a little difficulty when actually calling it
This hasn't been tested, I don't have C
You can try it yourself

Try passing it with a pipe, don't come here acting all disdainful,
some questions, to begin with, nobody would be willing to answer
You should know that!

That has nothing to do with it, too!

If you don't understand, can you be a bit modest? Showing off the most basic stuff in C?
Too bad it has nothing to do with the question, and you made a complete fool of yourself!

[ Last edited by ssyfzy on 2007-10-14 at 09:41 AM ]

That has nothing to do with it, too!

If you don't understand, can you be a bit modest? Showing off the most basic stuff in C?
Too bad it has nothing to do with the question, and you made a complete fool of yourself! ---------------------------------------->that's just sb

OP, you're really damn awesome!

['Reply #4']: Brother, thanks for the hard work. Don't help this kind of person again in the future!

Help?
Come on, does this count as helping?
He has a problem, so I'll help him, all right!!!