Defining & Using a Structure

We define a structure using the following syntax:

For-example we can define a structure for storing some student data:

Now for storing data we need to create an instance (also called an object) using this structure. A structure is basically a custom datatype, and hence it can be treated as such. So for creating a new object of the structure, we simply use the following syntax:

We can create multiple objects of the Student class, all of which can store data:

Each object we created has the set of fields defined in the Student structure and we can store and access data from those fields using the variableName.fieldName syntax. For example we can access and output the name field of student2:

When an empty object is created, the fields take up zero values depending upon their datatypes:

1. string - empty string "";
2. char - empty character '';
3. int - 0;
4. float - 0.0;
5. bool - false.

Therefore, the student2.name will give an empty output.

We can store data in it using the assignment operator (=):

This way we can store data in all of the three objects: