Vectors of nested structures:
The Combining vectors and nested structures are possible to have a vector of structures in which several fields are structures themselves. Here is an illustration in which a company manufactures cylinders from various materials for industrial use. The Information on them is stored in a data structure in a program. The cyls variable is a vector of structures, each of which has the dimensions, fields code, and weight. The dimensions field is a structure itself which consists of fields rad and height for the radius and height of each cylinder.