我在VDM++ ToolBox Academic中遇到一个愚蠢的错误。

当我尝试运行操作时，出现以下错误:

Run-Time Error 280: No constructor with this parameter list is in scope
value: "Game"

public Game: Date * Team * Team ==> Game
Game(d,t1,t2) == (
    matchday := d;
    host := t1;
    visitor := t2;
    return self;
);

game := new Game(matchday1day1,groupA.teams(2),groupA.teams(3));

public groupA : Group;
public matchday1day1 : Date;

public teams : seq of Team;

最佳答案

如果我正确阅读了您对模型的描述，那么它应该看起来像这样:

class Group

instance variables
public teams : seq of Team := [new Team(),new Team(),new Team()];
end Group

class Team
end Team

class Date
end Date

class Game

instance variables
matchday: Date;
host : Team;
visitor : Team;

operations
public Game: Date * Team * Team ==> Game
Game(d,t1,t2) == (
    matchday := d;
    host := t1;
    visitor := t2;
    return self;
);
end Game

class Test
instance variables

public groupA : Group := new Group();
public matchday1day1 : Date := new Date();

operations

public test : ()==>()
test()== (
dcl game : Game;
 game := new Game(matchday1day1,groupA.teams(2),groupA.teams(3)) ;
)

end Test

https://stackoverflow.com/questions/13685863/