From 8fa47562388861884a14cb05b4e222575e95aaeb Mon Sep 17 00:00:00 2001
From: Anzhelika Nikolaieva <anzhelika.nikolaieva@student.tuke.sk>
Date: Tue, 31 Oct 2023 16:03:53 +0000
Subject: [PATCH] Update 'a1/program.c'

---
 a1/program.c | 99 ++++++++++++++++++++++++----------------------------
 1 file changed, 46 insertions(+), 53 deletions(-)

diff --git a/a1/program.c b/a1/program.c
index eb20b37..e986049 100644
--- a/a1/program.c
+++ b/a1/program.c
@@ -1,71 +1,64 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdbool.h>
-#include<ctype.h>
 
-int open_brackets(char a) {
-    return (a == '(' || a == '[' || a == '{' || a == '<');
-}
+bool brackets(const char *code) {
+    int stack[100];
+    int top = -1;
 
-int close_brackets(char a) {
-    return (a == ')' || a == ']' || a == '}' || a == '>');
-}
+    for (int i = 0; code[i] != '\0'; i++) {
+        if (code[i] == '(' || code[i] == '[' || code[i] == '{' || code[i] == '<') {
+            stack[++top] = i;
+        } else if (code[i] == ')' || code[i] == ']' || code[i] == '}' || code[i] == '>') {
+            if (top == -1) {
+                printf("Unexpected closing bracket %c in %d \n", code[i], i);
+                return false;
+            }
 
-char brackets(char a) {
-    switch (a) {
-        case ')':
-            return '(';
-        case ']':
-            return '[';
-        case '}':
-            return '{';
-        case '>':
-            return '<';
-        default:
-            return '\0';
+            int opening = stack[top--];
+            char expected_opening = 0;
+
+            if (code[i] == ')') {
+                expected_opening = '(';
+            } else if (code[i] == ']') {
+                expected_opening = '[';
+            } else if (code[i] == '}') {
+                expected_opening = '{';
+            } else if (code[i] == '>') {
+                expected_opening = '<';
+            }
+
+            if (code[opening] != expected_opening) {
+                printf("Crossed bracket %c in %d, expected %c \n", code[i], i, expected_opening);
+                return false;
+            }
+        }
     }
+
+    if (top != -1) {
+        int opening = stack[top];
+        printf("Unclosed bracket %c in %d \n", code[opening], opening);
+        return false;
+    }
+
+    return true;
 }
 
 int main() {
     char code[100];
-    printf("Read: ");
     fgets(code, sizeof(code), stdin);
-
-    int stack[100];
-    int skobochka = -1;
-    int error = -1;
-    char letters[100];
-    int letter_i = 0;
-
-    for (int i = 0; code[i] != '\0'; i++) {
-        if (isalpha(code[i])) {
-            printf("%c", code[i]);
-            letters[letter_i++] = code[i];
-        }
-        if (open_brackets(code[i])) {
-            printf(" ");
-            stack[++skobochka] = i;
-        } else if (close_brackets(code[i])) {
-            printf("%c", code[i]);
-            if (skobochka == -1) {
-                error = i;
-                break;
-            }
-            if (code[stack[skobochka]] != brackets(code[i])) {
-                error = i;
-                break;
-            }
-            skobochka--;
-        }
+ 
+    if (code[strlen(code) - 1] == '\n') {
+        code[strlen(code) - 1] = '\0';
     }
 
-    if (error == -1 && skobochka == -1) {
-        printf("\nAll brackets OK\n");
-    } else if (error == -1) {
-        printf("\nClosing bracket at position %d is not paired\n", stack[skobochka]);
-    } else {
-        printf("\nUnexpected closing bracket %c in %d\n", code[error], error);
+    printf("Read: %s\n", code);
+
+    if (brackets(code)) {
+        printf("All brackets OK\n");
     }
+
     return 0;
 }
+
     
\ No newline at end of file