Program to delete a file in C

Algorithm

Let's first see what should be the step-by-step procedure to compare two integers−

START
      
   Step 1 → Take two integer variables, say A & B
          
   Step 2 → Assign values to variables

   Step 3 → Compare variables if A is greater than B
   
   Step 4 → If true print A is greater than B
   
   Step 5 → If false print A is not greater than B

STOP

Flow Diagram

We can draw a flow diagram for this program as given below −

Pseudocode

Let's now see the pseudocode of this algorithm −

procedure compare(A, B)

   IF A is greater than B
      DISPLAY "A is greater than B"
   ELSE
      DISPLAY "A is not greater than B"
   END IF
      
end procedure

Implementation

Assuming we have file with name file_append.txt with this content −

This text was already there in the file.

Now, we shall see the actual implementation of the program −

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

int main ()
{
   int ret;
   FILE *fp;
   char filename[] = "file.txt";

   fp = fopen(filename, "w");

   fprintf(fp, "%s", "This is tutorialspoint.com");
   fclose(fp);
   
   ret = remove(filename);

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

Output

Output of this program should be −

File deleted successfully