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C remove() function

C library function - remove()

The remove() function is used to delete a given file, named by the pathname pointed to by path.

Syntax:

int remove(const char *filename)

remove() function Parameters:

Name Description Required /Optional
filename The name of filename to be removed... Required

Return value from remove() function:

  • The remove() function returns 0 if it successfully deletes the file.
  • A nonzero return value indicates an error.

Example: remove() function

The following example shows how to remove access to a file named /home/test.txt:

#include <stdio.h>
#include <string.h>

int main () {
   int status;
   char filename[] = "e:/test.txt";
   status = remove(filename);

   if(status == 0) {
      printf("File deleted successfully");
   } else {
      printf("Error: unable to remove the file");
   }   
   return(0);
}

Output:

File deleted successfully

C Programming Code Editor:

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C Programming: Tips of the Day

Reading a string with scanf :

An array "decays" into a pointer to its first element, so scanf("%s", string) is equivalent to scanf("%s", &string[0]). On the other hand, scanf("%s", &string) passes a pointer-to-char[256], but it points to the same place.

Then scanf, when processing the tail of its argument list, will try to pull out a char *. That's the Right Thing when you've passed in string or &string[0], but when you've passed in &string you're depending on something that the language standard doesn't guarantee, namely that the pointers &string and &string[0] -- pointers to objects of different types and sizes that start at the same place -- are represented the same way.

Ref : https://bit.ly/3pdEk6f