How to Access Array of Structure in C?
Last Updated :
19 Feb, 2024
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In C, we can create an array whose elements are of struct type. In this article, we will learn how to access an array of structures in C.
For Example,
Input:
myArrayOfStructs = {{'a', 10}, {'b', 20}, {'A', 9}}
Output:
Integer Member at index 1: 20
Accessing Array of Structure Members in C
We can access the array of structures in a very similar to accessing array elements. To access members of an array of structures we can use the array indexing and access individual fields of a struct using the dot operator.
Syntax to Access Array of Structure in C
arrayName[index].member;
Here,
arrayNameis the name of the array of struct.indexis the position of the struct in the array that we want to access, starting from 0.memberis the name of the member within the struct that we want to access.
C Program to Access Array of Struct Members
The below program demonstrates how we can access an array of structures in C.
// C Program to access the members of array of structure
#include <stdio.h>
// Defining the struct
struct MyStruct {
int id;
char name[20];
};
int main()
{
// Declaring an array of structs
struct MyStruct myArray[] = {
{ 1, "Person1" },
{ 2, "Person2" },
};
// Accessing and printing data using array indexing
printf("Struct at index 0: ID = %d, Name = %s\n",
myArray[0].id, myArray[0].name);
// Modifying the id of the second person
myArray[1].id = 3;
// Accessing and printing the updated information of the
// second person
printf("Struct at index 1 after modifying: ID = %d, "
"Name = %s\n",
myArray[1].id, myArray[1].name);
return 0;
}
Output
Struct at index 0: ID = 1, Name = Person1 Struct at index 1 after modifying: ID = 3, Name = Person2
Time Complexity: O(1)
Space Complexity: O(1)
