括号匹配

//括号匹配
int isMatched(char left, char right)
{
  if (left == '(' && right == ')')
    return 1;
  else if (left == '[' && right == ']')
    return 1;
  else if (left == '{' && right == '}')
    return 1;
  else
    return 0;
}

#define maxSize 100
int isParenthesesBalanced(char exp[])
{
  char s[maxSize];
  int top = -1;
  for (int i = 0; exp[i] != '\0'; i++)
  {
    if (exp[i] == '(' || exp[i] == '[' || exp[i] == '{')
      s[++top] = exp[i];
    if (exp[i] == ')' || exp[i] == ']' || exp[i] == '}')
    {
      if (top == -1)
        return 0;
      char left = s[top--];   //出栈检测
      if (isMatched(left, exp[i]) == 0)
        return 0;
    }
  }
  if (top > -1)
    return 0;
  return 1;

}