CREATE DOS COMMAND DIR BY C



Answer:
Step 1: Write following code.
#include <stdio.h>
#include <dos.h>
void main(int count,char *argv[])
{
  struct find_t q ;
  int a;
  if(count==1)
  argv[1]="*.*";
  a = _dos_findfirst(argv[1],1,&q);
  if(a==0)
  {
     while (!a)
   {
    printf("  %s\n", q.name);
    a = _dos_findnext(&q);
    }
  }
  else
  {
  printf("File not found");
  }
}
Step 2: Save the as open.c (You can give any name)
Step 3: Compile and execute the file.
Step 4: Write click on My computer of Window XP operating system and select properties.
Step 5: Select Advanced -> Environment Variables
Step 6: You will find following window:
Click on new button (Button inside the red box)






Step 7: Write following:
Variable name: path
Variable value: c:\tc\bin\open.c  (the path where you have saved)
Step 8: Open command prompt and write list and press enter button.
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