Definition

Arrays within structures in C allow you to define a structure that contains an array as one of its members. This enables you to organize and store related data in a more structured and logical manner.

Syntax:

struct structure_name {
          data_type member1;
          data_type member2;
          // ...
          data_type array_member[N];  // Array as a member
          // ...
      };
      

• Structure Declaration:Define a structure using the struct keyword.
• Member Declaration:Declare various members inside the structure, including an array member.
• Array Size:Specify the size of the array using a constant or a defined constant.
• Accessing Array in Structure:Use the dot (.) operator to access the array member inside the structure.
• Data Types:Choose appropriate data types for structure members and the array.
• Memory Allocation:The memory for the structure is allocated as the sum of the memory required for each member.
• Initialization:You can initialize structure members and the array during declaration or later in the program.

Examples :

Program.c

// Define a structure with an array member struct Student { char name[50]; int age; float marks[5]; }; int main() { // Declare and initialize a structure variable struct Student student1 = {"John Doe", 20, {85.5, 90.0, 78.5, 92.0, 88.5}}; // Accessing and printing structure members printf("Student Name: %s\n", student1.name); printf("Age: %d\n", student1.age); // Accessing and printing array elements within the structure printf("Marks: "); for (int i = 0; i < 5; i++) { printf("%.2f ", student1.marks[i]); } return 0; }

The program defines a structure Student with members name, age, and marks (an array of floats).
            It initializes a structure variable student1 with sample data.
            It prints the student's name, age, and marks using the structure variable.
            

Output:

      Student Name: John Doe
    Age: 20
    Marks: 85.50 90.00 78.50 92.00 88.50