Jan 12, 2012

K & R C Programs Exercise 4-10.

K and R C, Solution to Exercise 4-10:
K and R C Programs Exercises provides the solution to all the exercises in the C Programming Language (2nd Edition). You can learn and solve K&R C Programs Exercise.
C Program to modify the K & R C Programs Exercise 4-5, An alternate organization uses getline to read an entire input line; this makes getch and ungetch unnecessary. revise the caluculater to use this aproach. Read more about C Programming Language .

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#define MAXLINE 100
int getline(char line[], int limit);
int li = 0;
char line[MAXLINE];
/* Getop: get next operator or numeric operand. */
int Getop(char s[])
 int i;
 int c;

 if(line[li] == '\0')
  if(getline(line, MAXLINE) == 0)
   return EOF;
  else li = 0;
 /* Skip whitespace */
 while((s[0] = c = line[li++]) == ' ' || c == '\t')
 s[1] = '\0';

 /* Not a number but may contain a unary minus. */
 if(!isdigit(c) && c != '.' )
  return c;
 i = 0;

  while(isdigit(s[++i] = c =line[i++]))

 if(c == '.')
  while(isdigit(s[++i] = c =line[i++]))
 s[i] = '\0';
 return NUMBER;

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