/* 
This program demonstrates some uses of boolean operations.
-G.C. Rutledge
September 2002
*/

#include <stdio.h>

int main(void)
{
  int big = 10, small = 5, result;
  char c;

  printf("\nThe program demonstrates some uses of boolean operations.\n");
  printf("Enter RETURN to step through examples.\n\n");
  printf("Start with big=%d, small=%d\n",big,small);

  /* examples of relational operators */
  printf("First, the relational operators:\n");

  result = big > small;
  printf("big > small returns a value of... ");
  getchar();
  printf("%d\n", result);

  result = big < small;
  printf("big < small returns a value of... ");
  getchar();
  printf("%d\n", result);

  result = big == small;
  printf("big == small returns a value of... ");
  getchar();
  printf("%d\n", result);

  result = big != small;
  printf("big != small returns a value of... ");
  getchar();
  printf("%d\n", result);

  /* examples of logical operators */
  printf("Now, some logical operators:\n");

  result = (big > small) && (big != small);
  printf("(big > small) && (big != small) returns a value of... ");
  getchar();
  printf("%d\n", result);

  result = (big < small) || (big == small);
  printf("(big < small) || (big == small) returns a value of... ");
  getchar();
  printf("%d\n", result);

  result = (big - small) || (big == small);
  printf("(big - small) || (big == small) returns a value of... ");
  getchar();
  printf("%d\n", result);

  /* beware of this common error: don't confuse = with == */
  printf("Beware of this common mistake:\n");
  result = (big < small) || (big = small);
  printf("(big < small) || (big = small) returns a value of... ");
  getchar();
  printf("%d\n", result);
  printf("The value of big is now... ");
  getchar();
  printf("%d\n", big);

  /* now watch this: */
  result = !big;
  printf("Now watch this: The value of !big is... ");  
  getchar();
  printf("%d\n", result);

  /* conditional operator */
  printf("Lastly, the conditional operator: \n");
  printf("First, reset big = 10.\n");
  big = 10;
  result = big>small?big:small;
  printf("The value of big>small?big:small is... ");
  getchar();
  printf("%d\n",result);

  return (0);
}