C Program to Copy the Elements of one Array into Another Array

Understanding the Task

• Goal: Create a C program that replicates elements from one array into another, ensuring independent storage.
• Key Concepts:
  • Arrays: Data structures for storing multiple elements of the same type.
  • Loops: for loop for iterating through array elements.
  • Array indexing: Accessing individual elements using their indices.

Step-by-Step Guide

1. Header Inclusion

C

#include <stdio.h>

• Explanation: Includes the standard input/output library for functions like printf.

2. Main Function

C

int main() {
    // Code statements here
    return 0;
}

3. Declare Arrays

C

int arr1[100], arr2[100];  // Declare arrays of size 100 (adjust as needed)
int size;

• Explanation: Declares two integer arrays arr1 and arr2, each with a capacity of 100 elements. Adjust the size as required.

4. Get Number of Elements

C

printf("Enter the number of elements: ");
scanf("%d", &size);

5. Get Elements of the First Array

C

printf("Enter elements of the first array:\n");
for (int i = 0; i < size; i++) {
    scanf("%d", &arr1[i]);
}

6. Copy Elements to the Second Array

C

for (int i = 0; i < size; i++) {
    arr2[i] = arr1[i];  // Copy each element from arr1 to arr2
}

7. Print the Copied Array

C

printf("Elements of the second array:\n");
for (int i = 0; i < size; i++) {
    printf("%d ", arr2[i]);
}
printf("\n");

8. Complete Code

C

#include <stdio.h>

int main() {
    int arr1[100], arr2[100];
    int size;

    printf("Enter the number of elements: ");
    scanf("%d", &size);

    printf("Enter elements of the first array:\n");
    for (int i = 0; i < size; i++) {
        scanf("%d", &arr1[i]);
    }

    for (int i = 0; i < size; i++) {
        arr2[i] = arr1[i];
    }

    printf("Elements of the second array:\n");
    for (int i = 0; i < size; i++) {
        printf("%d ", arr2[i]);
    }
    printf("\n");

    return 0;
}

9. Executing the Program

1. Save the code as a .c file (e.g., array_copy.c).
2. Compile using a C compiler (e.g., gcc array_copy.c -o array_copy).
3. Run the executable (e.g., ./array_copy).

Key Points

• The two arrays are now independent, meaning changes to one won’t affect the other.
• Ensure the second array has sufficient space to accommodate the copied elements.
• Consider using functions for better organization and reusability when working with more complex array operations.