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One class depends on another if the independent class is a parameter variable or local variable of a method of the dependent classĪggregation can occur when a class is a collection or container of other classes, but where the contained classes do not have a strong life cycle dependency on the container-essentially, if the container is destroyed, its contents are not. One object is aware of another it contains a pointer or reference to another object. “1.*” One or more instances (at least one) “0.1” No instances, or one instance (optional, may) In a system a class may be related to different classes,following are the different relation ship. “Out” The parameter is an output parameter.ġ) Static members are represented as underlined.Ģ) Pure virtual functions are represented as italics.
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“Inout” The parameter is capable of both input and output. “in” The parameter is an input parameter. This post is meant for such people also it will be helpful for beginners, here I will explain the class diagram with C++ class example.Ĭlass diagram for the above class is shown below.ĭifferent visibility of the class can be represented as As you know a Class diagram is a diagram showing different classes in a system their attribute, operation and the relationship among different objects.Įven I have been using it for long time I always had confusion each time when I use it.