Values can be assigned to structure elements similar to assigning values to variables. Values can be assigned directly as similar to assigning values to Arrays.

In this method of passing the structures to functions, the address of a structure variable /object is passed to the function using address of (&) operator. So any change made to the contents of structure variable inside the function are reflected back to the calling function.

The declaration of a 2-D array is data-type array_name[row-size][col-size];
In the above declaration, data-type refers to any valid C++ data-type, array_name refers to the name of the 2-D array, row-size refers to the number of rows and col-size refers to the number of columns in the 2-D array.

(a) output
1. 0.250.73
2. Named structure point is created 
(b) 1. No output; Error
2. Anonymous structure point is created.

The structure declared within another structure is called a nested structure
Example:
struct Student
{
int age;
float height, weight;
struct dob
{
int date;
char month[4];
int year;
};
}sl;

"An array is a collection of variables of the same type that are referenced by a common name".
An array is also a derived datatype in C++.
There are different types of arrays used in C++. They are:
1. One-dimensional arrays
2. Two-dimensional arrays
3. Multi-dimensional arrays

An array of structures is declared in the same way as declaring and array with built-in data types like int or char. A class may contain many students. So, the definition of structure for one student can also be extended to all the students. If the class has 20 students, then 20 individual structures are required. For this purpose, an array of structures can be used
The following program read the details of 20 students and prints the same.
#include< iostream >
using namespace std;
struct Student
{
int age;
float height, weight;
char name[30];
};
void main()
{
Student std[20];
int i;
cout << "Enter the details for 20 students" << endl;
for(i=0;i<20;i++ )
cout << " Enter the details of student'' << i+ 1<< endl;
cout << " Enter the age:"<< endl;
cin >> std[i].age;
cout << "Enter the height:" << endl;
cin >> std[i].height;
cout << "Enter the weight" << endl;
cin >> std[i].weight;
}
cout << "The values entered for Age, height and weight are''< for(i=0;i<20;i++ )
cout << "Student'' << i+ 1<< "\t" << std[i].age << "\
cout << "std[i].height << "\t" << std[i].weight;
}

In C++, arrays can be passed to a function as an argument. To pass an array to a function in C++, the function needs the array name as an arugment. Passing a two-dimensional array to a function a program to display marks of 5 students by passing one dimensional array to a function
# include< iostream >
using namespace std;
void display (in m[5]);
int main()
{
int marks [5]= {88, 76, 90, 61, 69};
display(marks);
return 0;
}
void display (int m[5])
{
cout << "\n Display Marksr:" << endl;
for(int i=0; i<5; i++)
{
cout << "Student'< }
}
Output:
Display Marks:
Student 1: 88
Student 2: 76
Student 3: 90
Student 4: 61
Student 5: 69