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


int main()
{
    char * ptr;
    char str[80];
    FILE * fp;

    fp = fopen ( "foo.txt", "rw+" );
    fprintf ( fp, "hello world\n" );
    fclose( fp );

    fp = fopen ( "foo.txt", "rw+" );
    fgets ( str, 80, fp );
    fclose( fp );
    fprintf ( stdout, "this string is '%s'\n", str );

    /* remove the \n */
    if ( ( ptr = strchr ( str, '\n' ) ) )
    {
        *ptr = 0;
    }
    fprintf ( stdout, "this new string is '%s'\n", str );

    return 0;
}