98 lines
2.7 KiB
C
98 lines
2.7 KiB
C
#include <stdio.h>
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#include <stdbool.h>
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#include <string.h>
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#define MAX_SIZE 1000
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int is_valid_brackets(const char* s, int* err) {
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char stack[MAX_SIZE];
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int top = -1;
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for (int i = 0; s[i] != '\0'; i++) {
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char c = s[i];
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if (c == '(' || c == '[' || c == '{' || c == '<') {
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if (top < MAX_SIZE - 1) {
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stack[++top] = c;
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} else {
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*err = i +1;
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return 0;
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}
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}
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else if (c == ')' || c == ']' || c == '}' || c == '>') {
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if (top == -1) {
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*err = i +1;
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return 0;
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}
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char last = stack[top--];
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if ((c == ')' && last != '(') ||
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(c == ']' && last != '[') ||
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(c == '}' && last != '{') ||
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(c == '>' && last != '<')) {
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*err = i+1;
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return 0;
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}
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}
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}
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if (top != -1) {
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// Знаходимо позицію незакритої дужки
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char lastOpen = stack[top];
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for (int i = 0; s[i] != '\0'; i++) {
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if (s[i] == lastOpen) {
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*err = i +1;
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return 0;
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}
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}
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}
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return 1;
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}
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char getExpectedClosing(char open) {
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switch (open) {
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case '(': return ')';
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case '[': return ']';
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case '{': return '}';
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case '<': return '>';
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default: return '?';
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}
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}
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int main() {
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char input[MAX_SIZE];
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if (fgets(input, MAX_SIZE, stdin) != NULL) {
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input[strcspn(input, "\n")] = '\0';
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printf("Read: %s\n", input); // Додано "Read: "
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int err = 0;
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if (is_valid_brackets(input, &err)) {
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printf("All brackets OK\n"); // Змінено з "True"
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} else {
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char stack[MAX_SIZE];
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int top = -1;
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for (int i = 0; i < err ; i++) {
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char c = input[i];
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if (c == '(' || c == '[' || c == '{' || c == '<') {
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stack[++top] = c;
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} else if (c == ')' || c == ']' || c == '}' || c == '>') {
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top--;
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}
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}
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char c = input[err - 1];
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if (c == ')' || c == ']' || c == '}' || c == '>') {
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if (top <-1) {
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printf("Unexpected closing bracket %c in %d\n", c, err-1);
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} else {
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printf("Crossed bracket %c in %d, expected %c\n", c, err-1, getExpectedClosing(stack[top]));
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}
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} else {
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printf("Missing closing brackets: %c", getExpectedClosing(stack[top]));
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}
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}
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} else {
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printf("Error reading input\n");
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}
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return 0;
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}
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