Set each element in an array to the sum of the corresponding elements in two other arrays - C Array

Description

Set each element in an array to the sum of the corresponding elements in two other arrays

Demo Code

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

#define SIZE 10//w ww. j a va  2  s  .com

void add_arrays(int *addend1, int *addend2, int *sum, int array_length);

int main(void)
{
  srand(time(NULL));

  int array1[SIZE];
  int array2[SIZE];
  int sum[SIZE];

  // initialize arrays with random ints
  for (int i = 0; i < SIZE; i++)
  {
    array1[i] = rand() % 20;
    array2[i] = rand() % 20;
  }

  // get sum of arrays
  add_arrays(array1, array2, sum, SIZE);

  printf("%8s %8s %8s\n", "Array 1", "Array 2", "Sum");
  for (int i = 0; i < SIZE; i++)
    printf("%8d %8d %8d\n", array1[i], array2[i], sum[i]);

  return 0;
}
// calculate elementwise sum of two arrays
void add_arrays(int *addend1, int *addend2, int *sum, int array_length){
  for (int *tar = sum; tar < sum + array_length; tar++, addend1++, addend2++)
    *tar = *addend1 + *addend2;
}

Result

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