Dec 21, 2011

K & R C Programs Exercise 1-24.

K and R C, Solution to Exercise 1-24:
C program for rudimentary syntax errors like unbalanced parentheses, brackets,quotes,and braces. This program is hard if we do it in full generality. K and R C Program Exercises provides the solution to all the exercises in the C Programming Language, second addition, by Brian W.Keringhan and Dennis M.Ritchie(Prentice Hall,1988). You can learn and solve K&R C Programs Exercise. Read more about C Programming Language .
/***********************************************************
* You can use all the programs on  www.c-program-example.com
* for personal and learning purposes. For permissions to use the
* programs for commercial purposes,
* contact info@c-program-example.com
* To find more C programs, do visit www.c-program-example.com
* and browse!
* 
*                      Happy Coding
***********************************************************/

#include <stdio.h>

#define MAXLINE 1000 /* max input line size */
char line[MAXLINE]; /*current input line*/

int getline(void); /* taken from the KnR book. */

int main() {
 int len = 0;
 int t = 0;
 int brace = 0, parenthesis = 0, brack = 0;
 int s_quote = 1, d_quote = 1;

 while ((len = getline()) > 0) {
  t = 0;
  while (t < len) {
   if (line[t] == '{') {
    brace++;
   }
   if (line[t] == '}') {
    brace--;
   }
   if (line[t] == '[') {
    brack++;
   }
   if (line[t] == ']') {
    brack--;
   }
   if (line[t] == '(') {
    parenthesis++;
   }
   if (line[t] == ')') {
    parenthesis--;
   }
   if (line[t] == '\'') {
    s_quote *= -1;
   }
   if (line[t] == '"') {
    d_quote *= -1;
   }
   t++;
  }
 }
 if (d_quote != 1)
  printf("Mismatching double quote mark\n");
 if (s_quote != 1)
  printf("Mismatching single quote mark\n");
 if (parenthesis != 0)
  printf("Mismatching parenthesis\n");
 if (brace != 0)
  printf("Mismatching braces\n");
 if (brack != 0)
  printf("Mismatching bracket mark\n");
 if (brack == 0 && brace == 0 && parenthesis == 0 && s_quote == 1 && d_quote
   == 1)
  printf("Syntax appears to be correct.\n");
 return 0;
}

/* getline function */
int getline(void) {
 int c, i;
 extern char line[];

 for (i = 0; i < MAXLINE - 1 && (c = getchar()) != EOF && c != '\n'; ++i)
  line[i] = c;
 if (c == '\n') {
  line[i] = c;
  ++i;
 }
 line[i] = '\0';
 return i;

}

Read more Similar C Programs
C Basic

K and R C Programs Exercise
You can easily select the code by double clicking on the code area above.

To get regular updates on new C programs, you can

You can discuss these programs on our Facebook Page. Start a discussion right now,

our page!

Share this program with your Facebook friends now! by liking it


(you can send this program to your friend using this button)

Like to get updates right inside your feed reader? Grab our feed!
To browse more C Programs visit this link