c语言通过栈判断括号匹配是否配对

#include<stdio.h>
#include<assert.h>
#include<stdlib.h>
#define bool char 
#define true 1
#define MAX_LEN 10
#define false 0
typedef  char ElementType;
typedef struct Stack {
	int top;
	ElementType stackList[MAX_LEN];
} Stack;
bool fn(char arr[], int len, Stack* S);
bool push(Stack* S, ElementType data);
bool pop(Stack* S, ElementType* x);
bool intStack(Stack* S);
int main() {
	Stack S;
	intStack(&S);
	char brackList[] = {'(', '{','(',')','}','{','}','}' };
	printf("%d", fn(brackList, sizeof(brackList) / sizeof(brackList[0]), &S));
}
bool fn(char arr[], int len, Stack* S) {
	for (int i = 0; i < len; i++) {
		if (arr[i] == '{' || arr[i] == '(') {
			push(S,arr[i]);
			printf("%c", arr[i]);
		}
		else {
			if (S->top == 0) {
				return false;
			}
			ElementType topData;
			pop(S, &topData);
			if (topData == '(' && arr[i] != ')') {
				return false;
			}
			else if (topData == '{' && arr[i] != '}') {
				return false;
			}
		}
	}
	if (S->top == 0) {
		return true;
	}
	return false;
}
//初始化
bool intStack(Stack* S) {
	for (int i = 0; i < MAX_LEN; i++) {
		S->stackList[i] = 0;
	}
	S->top = 0;
	return true;
}
//入栈
bool push(Stack* S,ElementType data) {
	S->top++;
	S->stackList[S->top] = data;
	return true;
}
//出栈
bool pop(Stack* S, ElementType *x) {
	*x = S->stackList[S->top];
	S->stackList[S->top] = 0;
	S->top--;
	return true;
}