C Programming - Library Functions - Discussion

The ftell() function shall obtain the current value of the file-position indicator for the stream pointed to by stream.

Example:

#include <stdio.h>

int main(void)
{
	FILE *stream;
	stream = fopen("MYFILE.TXT", "w+");
	fprintf(stream, "This is a test");
    printf("The file pointer is at byte %ld\n", ftell(stream));
    fclose(stream);
    return 0;
}