Remove function in C/C++

The C library function int remove(const char *filename) deletes the given filename so that it is no longer accessible.

Following is the declaration for remove() function.

int remove(const char *filename)

This function takes the filename. This is the C string containing the name of the file to be deleted. On success, zero is returned. On error, -1 is returned, and errno is set appropriately.


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

Let us assume we have a text file file.txt having some content. So we are going to delete this file, using the above program. Let us compile and run the above program to produce the following message and the file will be deleted permanently.


File deleted successfully