/* Examples of ways to detect end-of-file
 * (from standard input, end of file is generated by pressing <Ctrl>-d)
 */
#include <stdio.h>

int main() {
    char ch;
    int retvalue;

    /* Use getchar() to obtain an input character -- upon detecting end-of-file, the value
     * EOF is stored in ch.
     */
    for (;;) {
        ch = getchar();
        if ( ch == EOF ) break;
        putchar( ch );
    } /* for */
    putchar( '\n' );

    /* Use scanf() to read in characters.  scanf() returns EOF upon detecting end-of-file.
     */
    for (;;) {
        retvalue = scanf("%c", &ch);
        if ( retvalue == EOF ) break;
        printf( "%c", ch );
    } /* for */
    printf( "\n" );
} /* main */