C language

Structures in C  

Structure is the collection of variables of different types under a single name for better handling.

Keyword struct is used for creating a structure.

Syntax of structure

struct structure_name 
{
    data_type member1;
    data_type member2;
    .
    .
    data_type memeber;
};

We can create the structure for a person as mentioned above as:

struct person
{
    char name[50];
    int cit_no;
    float salary;
};

This declaration above creates the derived data type struct person

Arrays In C

Arrays a kind of data structure that can store a fixed-size sequential collection of elements of the same type. An array is used to store a collection of data, but it is often more useful to think of an array as a collection of variables of the same type.

Declaring Arrays

To declare an array in C, a programmer specifies the type of the elements and the number of elements required by an array as follows −

type arrayName [ arraySize ];

This is called a single-dimensional array. The array Size must be an integer constant greater than zero and type can be any valid C data type. For example, to declare a 10-element array called balance of type double, use this statement −

double balance[10];

Initializing Arrays

You can initialize an array in C either one by one or using a single statement as follows −

double balance[5] = {1000.0, 2.0, 3.4, 7.0, 50.0};

The number of values between braces { } cannot be larger than the number of elements that we declare for the array between square brackets [ ].