You must assign a value to each field in a struct before using it, but there are several different ways to do this.
The first way is to assign the values directly, after you declare a new struct variable.
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| Point3D myPoint;myPoint.x = 34.0;myPoint.y = 25.0;myPoint.z = 36.0; |
The second way to assign values to all of the fields is to invoke the parameterless constructor, by using the newoperator. Note that you always get the built-in parameterless constructor–you cannot declare your own parameterless constructor in a custom struct.
This built-in constructor will initialize all fields to their default values.
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| Point3D myPoint = new Point3D(); |
The last way to assign values is to invoke a custom constructor, assuming that your constructor assigns values to the fields.
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| Point3D myPoint = new Point3D(10.0, 20.0, 30.0); |