Exercise

/*Use a copy function from exercise 2 to copy the third through fifth elements of a seven-element array into a three-element array.
The function itself need not be altered; just choose the right actual arguments.
(The actual arguments need not be an array name and array size. They only have to be the
address of an array element and a number of elements to be processed.)
*/

#include <stdio.h>

#define SIZE 7

void copy_arr(double source[], double target[], int element);

int main(void)
{
    double source[SIZE] = { 2.4, 5.6, 7.8, 4.7, 2.6, 8.4, 3.6 };

    double target[SIZE - 4];
    int i;

    for (i = 2; i < 5; ++i) {
        copy_arr(source, target, i);
    }

    return 0;
}

void copy_arr(double source[], double target[], int element)
{
    int tar_element = element - 2;

    target[tar_element] = source[element];

    printf("%.1lf ", target[tar_element]);

    putchar('\n');
}