return two pointers of arrays

You need to pass an array for the quotient and remainder into the divide function. Than you can read the values after the function returns.

#include<stdio.h>

void div(int* a, int* b, float* quotient, int* remainder, int count) {

    for (int i = 0; i < count; i++)
    {
        quotient[i] = a[i] / (double)b[i];
        remainder[i] = a[i] % b[i];
    }
}


int main() {

    int a[] = { 3,6,9,12,16,18 }, b[] = { 2,3,3,4,4,4 };

#define LENGTH  (sizeof(a) / sizeof(int))
    
    float quotient[LENGTH];
    int remainder[LENGTH];


    div(a, b, quotient, remainder, LENGTH);

    for (int i = 0; i < LENGTH; i++)
    {

        printf("Quotient is: %.1f\nRemainder is: %d\n", quotient[i], remainder[i]);
    }
    return 0;
}