program3_03.c

C语言入门经典一书的所有代码。书上面的所有代码均在此。希望大家喜欢

/* Program 3.3 Using nested ifs to analyze numbers */
#include <stdio.h>
#include <limits.h>            /* For LONG_MAX */

int main(void)
{
  long test = 0L;              /* Stores the integer to be checked */

  printf("Enter an integer less than %ld:", LONG_MAX);
  scanf(" %ld", &test);

  /* Test for odd or even by checking the remainder after dividing by 2 */
  if( test % 2L == 0L)
  {
    printf("The number %ld is even", test);

    /* Now check whether half the number is also even */
    if ( (test/2L) % 2L == 0L)
    {
      printf("\nHalf of %ld is also even", test);
      printf("\nThat's interesting isn't it?\n");
    }
  }
  else
    printf("The number %ld is odd\n", test);
  return 0;
}