Program to create file in C

Implementation

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

#include <stdio.h>
#include <sys/stat.h>
 
int main()
{
    FILE *fp;
    struct stat st;
    char *filename = "sample.txt";
    int flag;

    flag = stat(filename, &st);
 
    if(!flag)
    {
        printf("File already exists. \n");
        return 0;
    }
    else
        printf("File does not exist. \n");

   /*  open for writing */
   fp = fopen(filename, "w");

   if( fp == NULL )
   {
      printf("%s can not be opened. \n", filename);
      return -1;
   }
   else
   {
      printf("File: %s created.\n", filename);
   }

   if( !fclose(fp) )
      printf("File: %s closed.\n", filename);

    flag = stat(filename, &st);
 
    if(!flag)
    {
        printf("File exists.\n");
        return 0;
    }
    else
        printf("File does not exist.\n");

   return 0;
}

Output

Output of this program should be −

File does not exist.
File: sample.txt created.
File: sample.txt closed.
File exists.