# Issue

This is what I have currently, and I have no idea what to do to make it run:

```
void avg_sum(double a[], int n, double *avg, double *sum) {
int i;
*sum = 0.0;
for (i = 0; i < n; i++)
*sum += a[i];
*avg = *sum / n;
}
int main () {
int array[5] = {1, 2, 3, 4, 5};
int avg = 3;
int sum = 2;
avg_sum(array, 5, avg, sum);
}
```

I tried manipulating the arguments for running the function, but I can't figure out how to make it work. It can be simple, I just have to write a program to test the `avg_sum`

function. That portion must remain the same.

# Solution

You want this:

```
int main () {
double array[5] = {1, 2, 3, 4, 5}; // use double
double avg = 3;
double sum = 2;
avg_sum(array, 5, &avg, &sum); // call with &
}
```

`avg_sum`

operates on`double`

s, therefore you need to provide doubles.- parametrers 3 and 4 must be
*pointers*to double, therefore you need to use the address operator`&`

.

All this is covered in the first chapters of your beginner's C txt book.

Answered By - Jabberwocky Answer Checked By - Katrina (PHPFixing Volunteer)

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