C Program to Copy Elements From One Array to Another Array

• Write a C program to copy all elements from one array to another array.
• How to copy elements of one array to another array.

Required Knowledge

• C printf and scanf functions
• For loop in C
• Accessing Array Elements in C

Algorithm to copy elements of one array to another array
Let inputArray is an integer array having N elements and copyArray is the array where we want to copy all N elements of inputArray. Size of copyArray is >= size of inputArray.

• Using for loop, we will traverse inputArray from array from index 0 to N-1.
• We will copy the i^th(0 <= i <= N-1) element of inputArray to i^th index of copyArray.
  copyArray[i] = inputArray[i];

C program to copy all elements of an array to another array

/*
* C Program to copy all elements of one array to another array
*/
#include <stdio.h>
#include <conio.h>
  
int main(){
    int inputArray[100], copyArray[100], elementCount, counter;
      
    printf("Enter Number of Elements in Array\n");
    scanf("%d", &elementCount);
    printf("Enter %d numbers \n", elementCount);
     
    /* Read array elements */
    for(counter = 0; counter < elementCount; counter++){
        scanf("%d", &inputArray[counter]);
    }
        
    /* Copy array elements form inputArray to copyArray */
    for(counter = 0; counter < elementCount; counter++){
        copyArray[counter] = inputArray[counter];
    }
     
    /* Print duplicate Array(copyArray) elements */
    printf("Duplicate Array\n");
    for(counter = 0; counter < elementCount; counter++){
        printf("%d ", copyArray[counter]);
    }
          
    getch();
    return 0;
}

Output

Enter Number of Elements in Array
5
Enter 5 numbers
5 3 8 1 -3
Duplicate Array
5 3 8 1 -3