#include <stdio.h>
        #include <stdlib.h>

        main()
        {
            FILE *fp;
            int stat,
                i;
            int character;
            char ch,
                 c_ptr[130],
                 d_ptr[130];
            fpos_t posit;

            /* Open a file for writing.  */

            if ((fp = fopen("file.dat", "w+")) == NULL) {
                perror("open");
                exit(1);
            }

           /* Get the beginning position in the file.  */

            if (fgetpos(fp, &posit) != 0)
                perror("fgetpos");

            /* Write some data to the file. */

            if (fprintf(fp, "this is a test\n") == 0) {
                perror("fprintf");
                exit(1);
            }

            /* Set the file position back to the beginning. */

            if (fsetpos(fp, &posit) != 0)
                perror("fsetpos");

            fgets(c_ptr, 130, fp);
            puts(c_ptr);        /* Should be "this is a test."  */

            /* Close the file. */

            if (fclose(fp) != 0) {
                perror("close");
                exit(1);
            }

        }