Добавить a1/program.c

a1/program.c

@@ -0,0 +1,63 @@
+#include <stdio.h>
+#include <string.h>
+
+#define MAX_LEN 100
+
+typedef struct {
+    char bracket;
+    int position;
+} StackItem;
+
+int main() {
+    char line[MAX_LEN + 1];
+    StackItem stack[MAX_LEN];
+    int top = -1; 
+
+    fgets(line, sizeof(line), stdin);
+
+    printf("Read: %s", line);
+
+    for (int i = 0; line[i] != '\0'; i++) {
+        char ch = line[i];
+
+        if (ch == '(' || ch == '{' || ch == '[' || ch == '<') {
+            if (top < MAX_LEN - 1) {
+                stack[++top].bracket = ch;
+                stack[top].position = i;
+            }
+        }
+        else if (ch == ')' || ch == '}' || ch == ']' || ch == '>') {
+            if (top == -1) {
+    
+                return 0;
+            }
+
+            char opening = stack[top].bracket;
+            int opening_pos = stack[top].position;
+            top--;
+
+            if ((opening == '(' && ch != ')') ||
+                (opening == '{' && ch != '}') ||
+                (opening == '[' && ch != ']') ||
+                (opening == '<' && ch != '>')) {
+                char expected;
+                switch (opening) {
+                    case '(': expected = ')'; break;
+                    case '{': expected = '}'; break;
+                    case '[': expected = ']'; break;
+                    case '<': expected = '>'; break;
+                }
+                printf("Crossed bracket %c in %d, expected %c\n", ch, i, expected);
+                return 0;
+            }
+        }
+    }
+
+    if (top != -1) {
+        printf("Unmatched opening bracket %c at position %d\n", stack[top].bracket, stack[top].position);
+    } else {
+        printf("All brackets OK\n");
+    }
+
+    return 0;
+}