86 lines
2.7 KiB
C
86 lines
2.7 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define MAX_LENGTH 100
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// Function to check if two brackets are matching
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int isMatching(char opening, char closing) {
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return (opening == '{' && closing == '}') ||
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(opening == '[' && closing == ']') ||
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(opening == '(' && closing == ')') ||
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(opening == '<' && closing == '>');
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}
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// Function to get the expected closing bracket for a given opening bracket
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char getExpectedClosingBracket(char opening) {
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return (opening == '{') ? '}' :
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(opening == '[') ? ']' :
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(opening == '(') ? ')' :
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(opening == '<') ? '>' : '\0';
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}
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int main() {
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char input[MAX_LENGTH + 1];
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char stack[MAX_LENGTH];
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int top = -1; // Stack pointer
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int foundBracket = 0; // Flag to check if any bracket is found
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// Reading the string
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fgets(input, sizeof(input), stdin);
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// Remove newline character if present
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input[strcspn(input, "\n")] = 0;
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// Check if string length exceeds MAX_LENGTH
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if (strlen(input) > MAX_LENGTH) {
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printf("Error: Input length exceeds 100 characters.\n");
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return 1;
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}
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// Print the input line for the output format
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printf("Read: %s\n", input);
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// Iterating over each character in the string
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for (int i = 0; i < strlen(input); i++) {
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char current = input[i];
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// Check if current character is an opening bracket
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if (current == '{' || current == '[' || current == '(' || current == '<') {
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stack[++top] = current; // Push to stack
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foundBracket = 1; // Found at least one bracket
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}
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// If current character is a closing bracket
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else if (current == '}' || current == ']' || current == ')' || current == '>') {
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// If stack is empty, it's an error
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if (top == -1) {
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printf("Unexpected closing bracket %c in %d\n", current, i);
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return 0;
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}
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// If brackets do not match, it's an error
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if (!isMatching(stack[top--], current)) {
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printf("Crossed bracket %c in %d, expected %c.\n", current, i,
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getExpectedClosingBracket(stack[top + 1]));
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return 0;
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}
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}
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}
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// If there are unmatched opening brackets left in the stack
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if (top != -1) {
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printf("Missing closing brackets: %c\n", getExpectedClosingBracket(stack[top]));
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return 0;
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}
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// If no brackets are found, output a success message
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if (!foundBracket) {
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printf("All brackets OK\n");
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} else {
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// Expected correct output if all brackets match
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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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