C programming

In C, you can initialize a structure either at the time of declaration or later using an assignment. Here's an overview of both methods:

• Initialization at Declaration:

When you declare a structure, you can provide initial values for its members in the same line. Here's an example:

Examples :

                        #include <stdio.h>
                            // Define a structure
                            struct Point {
                                int x;
                                int y;
                            };
                            int main() {
                                // Initialize a structure at declaration
                                struct Point p1 = {3, 7};
                                // Access and print the values
                                printf("Coordinates: (%d, %d)\n", p1.x, p1.y);
                                return 0;
                            }

In this example, the structure Point has two members (x and y), and they are initialized with the values 3 and 7, respectively.

• Initialization after Declaration:

You can also initialize a structure after declaration using the assignment operator. Here's an example:

Examples :

                        #include <stdio.h>
                            // Define a structure
                            struct Point {
                                int x;
                                int y;
                            };
                            int main() {
                                // Declare a structure
                                struct Point p1;
                                // Initialize the structure after declaration
                                p1.x = 5;
                                p1.y = 10;
                                // Access and print the values
                                printf("Coordinates: (%d, %d)\n", p1.x, p1.y);
                                return 0;
                            }

Output:

        Coordinates: (5, 10)
        In this example, the structure Point is declared first, and then its members x and y are initialized with the values 5 and 10, respectively.

Resources :

Test Your Knowledge

Choose The

With supporting text below as a natural lead-in to additional content.

Q1. struct Point { int x; int y; }; int main() { struct Point p = {1, 2}; printf("%d, %d", p.x, p.y); return 0; }

A. 1, 2

B. 0, 0

C. Compilation Error

D. Runtime Error

Q2. struct Student { char name[20]; int age; float marks; }; int main() { struct Student s = {.name="John", .age=20, .marks=85.5}; printf("%s, %d years, %.2f marks", s.name, s.age, s.marks); return 0; }

A. John, 20 years, 85.50 marks

B. John, 0 years, 0.00 marks