/* Count blanks, digits, letters, newlines, and others. */

#include <stdio.h>

int main(void)
{
  int blank_cnt = 0, c, digit_cnt = 0,
    letter_cnt = 0, nl_cnt = 0, other_cnt = 0;

  while ((c = getchar()) != EOF) /* braces not necessary */
    if (c == ' ')
      ++blank_cnt;
    else if (c >= '0' && c <= '9')
      ++digit_cnt;
    else if (c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z')
      ++letter_cnt;
    else if (c == '\n')
      ++nl_cnt;
    else
      ++other_cnt;

  printf("%10s%10s%10s%10s%10s%10s\n\n",
    "blanks", "digits", "letters", "lines", "others", "total");
  printf("%10d%10d%10d%10d%10d%10d\n\n",
    blank_cnt, digit_cnt, letter_cnt, nl_cnt, other_cnt,
    blank_cnt + digit_cnt + letter_cnt + nl_cnt + other_cnt);
  return 0;
}

/* Print a table of values for some boolean functions. */

#include <stdio.h>

int main(void)
{
  int b1, b2, b3, b4, b5; /* boolean variables */
  int cnt = 0;

  printf("\n%5s%5s%5s%5s%5s%5s%7s%7s%11s\n\n", /* headings */
    "Cnt", "b1", "b2", "b3", "b4", "b5",
    "fct1", "fct2", "majority");

  for (b1 = 0; b1 <= 1; ++b1)
    for (b2 = 0; b2 <= 1; ++b2)
      for (b3 = 0; b3 <= 1; ++b3)
        for (b4 = 0; b4 <= 1; ++b4)
          for (b5 = 0; b5 <= 1; ++b5)
            printf("%5d%5d%5d%5d%5d%5d%6d%7d%9d\n",
              ++cnt, b1, b2, b3, b4, b5,
              b1 || b3 || b5, b1 && b2 || b4 && b5,
              b1 + b2 + b3 + b4 + b5 >= 3);
  putchar('\n');
  return 0;
}

/* A test that fails. */

#include <stdio.h>

int main(void)
{
  int cnt = 0;
  double sum = 0.0, x;

  for (x = 0.0; x != 9.9; x += 0.1) { /* trouble! */
    sum += x;
    printf("cnt = %5d\n", ++cnt);
  }
  printf("sum = %f\n", sum);
  return 0;
}

/* Print Fibonacci numbers and quotients. */

#include <stdio.h>

#define LIMIT 46

int main(void)
{
  long f0 = 0, f1 = 1, n, temp;

  printf("%7s%19s%29s\n%7s%19s%29s\n%7s%19s%29s\n", /* headings */
    " ", "Fibonacci", "Fibonacci",
    " n", " number", " quotient",
    "--", "---------", "---------");
  printf("%7d%19d\n%7d%19d\n", 0, 0, 1, 1); /* first two cases */

  for (n = 2; n <= LIMIT; ++n) {
    temp = f1;
    f1 += f0;
    f0 = temp;
    printf("%7ld%19ld%29.16f\n", n, f1, (double) f1 / f0);
  }
  return 0;
}