How to Join Arrays in C - Step by Step Examples

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How to Join Arrays in C ?

Answer

To join arrays in C, you can use the memcpy function or manually copy elements from one array to another.

✐ Examples

1 Joining Arrays using memcpy Function

In this example,

We create two arrays, arr1 and arr2.
We then use the memcpy function to copy elements of arr2 to the end of arr1.
The result is a new array result containing elements from both arr1 and arr2.

C Program

#include <stdio.h>
#include <string.h>
int main() {
    int arr1[] = {1, 2, 3};
    int arr2[] = {4, 5, 6};
    int size1 = sizeof(arr1) / sizeof(arr1[0]);
    int size2 = sizeof(arr2) / sizeof(arr2[0]);
    int result[size1 + size2];
    memcpy(result, arr1, size1 * sizeof(int));
    memcpy(result + size1, arr2, size2 * sizeof(int));
    for (int i = 0; i < size1 + size2; i++) {
        printf("%d ", result[i]);
    }
    return 0;
}

Output

1 2 3 4 5 6

Summary

In this tutorial, we learned How to Join Arrays in C language with well detailed examples.