1.24

1 files changed, 66 insertions, 0 deletions

diff --git a/1/24.c b/1/24.c
new file mode 100644
index 0000000..08107e1
--- /dev/null
+++ b/1/24.c
@@ -0,0 +1,66 @@
+#include <stdio.h>
+
+#define MAXLEN 1000
+#define TRUE 1
+#define FALSE 0
+
+#define INLINE 2
+#define MULTILINE 3
+
+/* checks c program for unbalanced parentheses, brackets and braces */
+int main(int argc, char *argv[]) {
+  int p, c, i, comment, quote, parens, bracks, braces;
+
+  p = 0;
+  comment = quote = FALSE;
+  parens = bracks = braces = 0;
+
+  for (i = 0; i < MAXLEN - 1 && (c = getchar()) != EOF; i++) {
+    if (!comment && !quote && (c == '/' || c == '*') && p == '/') {
+      comment = c == '/' ? INLINE : MULTILINE;
+      continue;
+    }
+    if (!comment && !quote && c == '"') {
+      quote = TRUE;
+      continue;
+    }
+    if (comment == INLINE && c == '\n') {
+      comment = FALSE;
+      continue;
+    }
+    if (comment == MULTILINE && c == '/' && p == '*') {
+      comment = FALSE;
+      continue;
+    }
+    if (!comment && quote && c == '"' && p != '\\') {
+      quote = FALSE;
+      continue;
+    }
+    if (!comment && !quote) {
+      if (c == '{')
+        braces++;
+      else if (c == '(')
+        parens++;
+      else if (c == '[')
+        bracks++;
+      else if (c == '}')
+        braces--;
+      else if (c == ')')
+        parens--;
+      else if (c == ']')
+        bracks--;
+    }
+  }
+
+  if (braces != 0)
+    printf("err: input contains %d open braces\n", braces);
+  if (parens != 0)
+    printf("err: input contains %d open parentheses\n", parens);
+  if (bracks != 0)
+    printf("err: input contains %d open brackets\n", bracks);
+
+  if (braces == 0 && parens == 0 && bracks == 0)
+    printf("all braces, parenthese and brackets are balanced!\n");
+
+  return 0;
+}
\ No newline at end of file