text: /*-*/
  /********************************************************
   * Name: Calculator (Version 0 -- prototype)		*
   *							*
   * Purpose:						*
   *	Act like a simple 4 function calculator.	*
   *							*
   * Usage:						*
   *	Run the program.				*
   *	Type in an operator (+ - * /) and a number.	*
   *	The operaton will be performed on the current	*
   *	result and a new result displayed.		*
   *							*
   * Note:						*
   *	This is the first attempt at doing this program.*
   *	It only works for + and because of a bug, even	*
   *	that fails.					*
   ********************************************************/
  /*+*/
  #include <stdio.h>
  char  line[100];/* line of data from the input */
  int   result;   /* the result of the calculations */
  char  operator; /* operator the user specified */
  int   value;    /* value specified after the operator */
  
  int main()
  {
      result = 0; /* initialize the result */
  
      /* Loop forever (or till we hit the break statement) */
      while (1) {
          printf("Result: %d\n", result);
  
          printf("Enter operator and number: ");
          fgets(line, sizeof(line), stdin);
          sscanf(line, "%c %d", &operator, &value);
  
          if (operator = '+') {
              result += value;
          } else {
              printf("Unknown operator %c\n", operator);
          }
      }
  }
  