How to obtain the file name system dir in C

Author: Qing Dujun

We know that DIR is the display directory. But how do I save the file name in the directory?

Several knowledge points are required:

I,DIR: Displays the file name (including summary) in the directory)

II,DIR/B: Only show the file name

III,DIR/B> 1.txt: Import the contents to the 1.txt file for storage.

IV,Del d: \ 1.txt: Delete D: The 1.txt file under the drive (if you want to delete the folder, use rm D: folder name)

V,DEL/q d: \ 1.txt: Force Delete, no need to confirm

VI,Fgets (): Reads a row from a file at a time.

Example: output the name of the bottom file in the XXX directory

Program ideology:

First, store the directory in the file, and then read the file until the last one.

# Include
 
  
# Include
  
   
Int main () {FILE * fp = NULL; char save [100]; system ("dir/B E: \ Ock \ DirSave> D: \ buf. ock "); // export the directory to buf. ockfp = fopen ("D: \ buf. ock "," rb "); while (! Feof (fp) {fgets (save, 100, fp);} fclose (fp); system ("del/q d: \ buf. ock "); // delete D: buf under the directory. ock file puts (save); // display the last file name return 0 ;}
  
 

Of course, you can obtain the path required by DIR from the parameters of the main () function:

#include 
 
  int main(int argc, char **argv){puts(argv[0]);return 0;}
 

Argv [0] content. This is the current directory. You can extract the desired path by yourself ~~~~

Use DIR/B D: to display the file directory diagram.