平衡符号

equalSymbol

int checkSymbol(Stack S){
  char ch;
  while((ch = getchar()) != '#'){
    if(ch == '(' || ch == '[' || ch == '{'){
      Push(ch, S);
    }
    else if(ch == ')' || ch == ']' || ch == '}'){
      if(isEmpty(S))
        Error("Stack is empty");
      else{
        switch(ch){
          case ')':
            if(Top(S) != '(')
              Error("not match");
            else
              break;
          case ']':
            if(Top(S) != '[')
              Error("not match");
            else
              break;
          case '}':
              if(Top(S) != '{')
              Error("not match");
            else
              break;
        }
        Pop(S);
      }
    }
  }
  if(!IsEmpty(S))
    Error("the stack is not empty last");
  else
    return 0;
}