An automated agricultural drone surveys a 5x5 grid of a vineyard to locate diseased grapevines. The algorithm shown in Figure 1 searches the grid to locate the coordinates of a grapevine flagged as "Diseased".
Figure 1
targetX = -1
targetY = -1
for x from 0 to 4
for y from 0 to 4
if checkCrop(x, y) == "Diseased" then
targetX = x
targetY = y
endif
endfor
endfor
Figure 2
| y = 0 | y = 1 | y = 2 | y = 3 | y = 4 | |
|---|---|---|---|---|---|
| x = 0 | Healthy | Healthy | Treated | Healthy | Healthy |
| x = 1 | Treated | Healthy | Healthy | Treated | Healthy |
| x = 2 | Healthy | Diseased | Healthy | Healthy | Healthy |
| x = 3 | Treated | Healthy | Treated | Healthy | Healthy |
| x = 4 | Healthy | Healthy | Healthy | Healthy | Treated |
Explain the purpose of the second (inner) iteration structure in the algorithm in Figure 1.
208 exam-style questions on AQA GCSE Computer Science Representing algorithms. Each one has a worked solution and a mark scheme showing where the marks go.