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education/software development/ECE1400/Chapter 11 Exercises.md
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@ -5,4 +5,25 @@ g. `*&i`
> 2. If `i` is an `int` variable and `p` and `q` are pointers to `int`, which of the following assignments are legal? > 2. If `i` is an `int` variable and `p` and `q` are pointers to `int`, which of the following assignments are legal?
a. e. `p = *&q;`
f. `p = q;`
i. `*p = *q`
> 3. The following function supposedly computes the sum and average of the numbers in the array `a`, which has length `n`. `avg` and `sum` point to the variables that the function should modify, unfortunately the function contains several errors, find and correct them.
```c
void avg_sum(double a[], int n, double *avg, double *sum)
{
int i;
// This was assigning a pointer to a float,
// the dereference operator was missing
*sum = 0.0;
for (i = 0; i < n; i++)
// This wasn't increasing the value
// `sum` points to, it was modifying the address the pointer po
(*sum) += a[i];
avg = sum / n;
}
```