`StudentRecord`

is #4 from the from the 2005 AP Computer Science A Free Response problems.

https://secure-media.collegeboard.org/apc/_ap05_frq_comp_sci_a_45544.pdf

## Part (a) `average`

method

```
private double average(int first, int last)
{
int sum = 0;
int numScores = 0;
for(int i = first; i <= last; i++)
{
sum += scores[i];
numScores++;
}
return sum / (double) numScores;
}
```

It is also possible to calculate the number of scores as `(last - first + 1)`

.

## Part (b) `hasImproved`

method

```
private boolean hasImproved()
{
for(int i = 1; i < scores.length; i++)
if(scores[i] < scores[i - 1])
return false;
return true;
}
```

## Part (c) `finalAverage`

method

```
public double finalAverage()
{
int start = 0;
if(hasImproved())
start = scores.length / 2;
return average(start, scores.length - 1);
}
```

## 2005 AP CS Exam Free Response Solutions

## Help & comments

Get help from AP CS Tutor Brandon Horn