How do you declare a struct pointer?

Pointer.c

1. #include
2. // create a structure Subject using the struct keyword.
3. struct Subject.
4. {
5. // declare the member of the Course structure.
6. char sub_name[30];
7. int sub_id;
8. char sub_duration[50];

How do you allocate memory for pointer in structure?

To allocate the memory for n number of struct person , we used, ptr = (struct person*) malloc(n * sizeof(struct person)); Then, we used the ptr pointer to access elements of person .

Can we have a pointer pointing to a struct yes or no?

Pointers to Structures Like we have pointers for int, char and other data-types, we also have pointers pointing to structures. These pointers are called structure pointers.

How do you access structure variables?

1. Array elements are accessed using the Subscript variable, Similarly Structure members are accessed using dot [.] operator.

How do you declare an array of structures?

Array of structures

1. The most common use of structure in C programming is an array of structures.
2. To declare an array of structure, first the structure must be defined and then an array variable of that type should be defined.
3. For Example − struct book b[10]; //10 elements in an array of structures of type ‘book’

How memory is allocated for structure What is the size of structure?

There are 5 members declared for structure in above program. In 32 bit compiler, 4 bytes of memory is occupied by int datatype. 1 byte of memory is occupied by char datatype and 4 bytes of memory is occupied by float datatype.

What is the difference between structure and union?

The size of a structure is equal or greater to the sum of the sizes of each data member. When the variable is declared in the union, the compiler allocates memory to the largest size variable member. The size of a union is equal to the size of its largest data member size.