60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
#include <stdio.h>
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#include <string.h>
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#define MAX_LENGTH 100
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int isMatchingPair(char open, char close)
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{
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return (open == '(' && close == ')') || (open == '{' && close == '}') || (open == '[' && close == ']') || (open == '<' && close == '>');
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}
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int main()
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{
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char input[MAX_LENGTH];
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fgets(input, sizeof(input), stdin);
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int len = strlen(input);
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if (input[len - 1] == '\n')
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{
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input[len - 1] = '\0';
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len--;
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}
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printf("Read: %s\n", input);
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char stack[MAX_LENGTH];
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int top = -1;
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for (int i = 0; i < len; i++)
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{
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char ch = input[i];
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if (ch == '(' || ch == '{' || ch == '[' || ch == '<')
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{
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stack[++top] = ch;
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}
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else if (ch == ')' || ch == '}' || ch == ']' || ch == '>')
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{
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if (top == 0)
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{
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printf("Crossed bracket %c in %d, expected opening bracket\n", ch, i);
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return 0;
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}
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else if (!isMatchingPair(stack[top], ch))
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{
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printf("Crossed bracket %c in %d, expected %c\n", ch, i, (stack[top] == '(' ? ')' : stack[top] == '{' ? '}' : stack[top] == '[' ? ']' : '>'));
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return 0;
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}
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top--;
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}
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}
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if (top != -1)
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{
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printf("Unmatched opening bracket %c\n", stack[top]);
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return 0;
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}
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printf("All brackets OK\n");
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return 0;
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} |