c++ - How to compare two objects (the calling object and the parameter) in a class? -


I am writing a "date" class for assignment and I'm having trouble doing the function one.

This is the header for the class. 

  class date {public: date (); // constructor date without parameters (int m, int d, int y); // Constructor with // Parameter // Accessories in Amnath (); // Diamond enters the size of the gateway; Int gear (); // set the mutator bool (int m, int d, int y); Bull Set Format (Four F); // standard input and output routine zero input (); Show zero (); Zero increment (int number = 1); Int Comparison (Constellation and D); Private: int month, month of month, // day variable year; // variable variables in year; };

The member function I am trying to do is the int compare (constant date and d) function. I need this function to compare two functions (calling object and parameter), and should return it: -1 If the calling object comes first in chronological order, 0 if the object is the same date, and 1 if the parameter object The first comes from chronological order.

I have tried to make a simple statement with the operator == but I get errors. 

  if (D1 == D2) COAT & LT; & Lt; "Dates are the same"; Return (0);

After the objects are created, the function should be deemed as D1. Compared (D2)

Thanks in advance! 

  int date: compare (concat date and d) {if (year & lt ; D year) {return -1; } And if (year> D.Year) {return 1; } And if (month> month lt) {return -1; } And if (month> D. month) {return 1; } // 0 for the same day return; }

Usually, you also want to provide the overloaded comparison operator, for example (even within class definition): 

  bool operator == (Const date & amp; D) const {return! Compare (D); } The Bull Operator & lt; (Constant Date and D) Cost {Compare Comparison (D) & lt; 0; } ... // Promotions: Operator

: Better ways than PS: () - just the other answers Check it is a very simple and readable, but consistent with your specification.


Comments

Post a Comment

Popular posts from this blog

sql - dynamically varied number of conditions in the 'where' statement using LINQ -

I am using my first project LINQ (in mvc), so maybe there's something very simple that I remember. However, a day of searching and experimenting does not work, so it works. I am trying to write a LINQ query (Linux to SQL) in which in many cases where the statement is different from an OR or an AND. We do not know how many conditions are going in the query till runtime. This search is for filter control, where the user can choose multiple criteria for filtering. Select from table where table.col = 1 or table.col = 2 or table.col = 7 .... 'Other number of conditions Before I just create the SQL query as a string, while looping over all the situations. However, it seems that there should be a good way to do this in LINQ. I tried to use Expression trees, but they had a second thought for this moment on my head, where the lambda function was to be executed inside the statement such as: values ​​for matchingRows = matchingRows for each value Where (function (row) row.c...
Read more

asp.net mvc - Dynamically Generated Ajax.BeginForm -

I have a problem with ASP.NET MVC Ajax forms. I generate many Ajax form in a table such as: & Lt; Input type = "submit" name = "activity" value = "add activity" / & gt; & Lt;%}% & gt; & Lt; / TD & gt; & Lt; / TR & gt; & Lt;%}% & gt; So far so good. When I post one of those forms, it gives a partial view in a div, and in this new partial view a new Ajax Beginnform (which is not in Genesis form) This second Ajax Beginnorf is exactly like the ones I got on the table, but when I post it, I do not get the "Ajax Post", but a normal post that sends me to a new page, I do not know whether the two Ajax forms What is the reason for the difference between, why is it the "dynamically generated" Ajax form behaves like a normal HTML form? By the way, I know that I can do it in different ways using javascript, but I would like to understand whether it can only be done using MVC helplars and Ajax lib...
Read more

Debug on symbian -

I am using trk for phone debug This works well for the Holorld project But when I start the project in phone debug mode 1) the load failed 2) TrkProtocolPlugin: to target the specified file Failure (please verify If any body understands what problem I am experiencing, then this problem helps me Pre-release If the application has the privileges assigned (with the appropriate certificate) itemprop = "text" > In your case, I will check: / li> If there is no conflict of application ID with any other application of device If there are problematic commands in the installation package (for example copy copy for non-accessible directories)
Read more