71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
#include <stdio.h>
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#include <string.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#define MAX_SIZE 100
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struct stack {
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char data[MAX_SIZE];
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int size;
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} stack;
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int main() {
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char code[MAX_SIZE];
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stack.size = 0;
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fgets(code, sizeof(code), stdin);
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if (code[strlen(code) - 1] == '\n') {
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code[strlen(code) - 1] = '\0';
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}
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printf("Read: %s\n", code);
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char missing_closing[MAX_SIZE];
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int missing_count = 0;
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for (int i = 0; code[i] != '\0'; i++) {
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if (code[i] == '(' || code[i] == '[' || code[i] == '{' || code[i] == '<') {
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if (stack.size < MAX_SIZE) {
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stack.data[stack.size++] = code[i];
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} else {
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exit(0);
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}
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} else if (code[i] == ')' || code[i] == ']' || code[i] == '}' || code[i] == '>') {
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if (stack.size == 0) {
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printf("Unexpected closing bracket %c in %d\n", code[i], i);
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return 0;
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}
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char opening = stack.data[stack.size - 1];
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stack.size--;
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if ((code[i] == ')' && opening != '(') ||
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(code[i] == ']' && opening != '[') ||
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(code[i] == '}' && opening != '{') ||
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(code[i] == '>' && opening != '<')) {
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printf("Crossed bracket %c in %d, expected %c\n", code[i], i, opening);
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return 0;
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}
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}
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}
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while (stack.size > 0) {
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char unclosed = stack.data[--stack.size];
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missing_closing[missing_count++] = (unclosed == '(') ? ')' : (unclosed == '[') ? ']' : (unclosed == '{') ? '}' : '>';
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if (missing_count >= MAX_SIZE) {
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exit(0);
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}
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}
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if (missing_count > 0) {
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printf("Missing closing brackets: %s\n", missing_closing);
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} else {
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printf("All brackets OK\n");
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}
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return 0;
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}
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