Iteration Exercise 2 while loop specimen answer

Iteration Exercise 2a

Develop a program using a while loop, that will allow any number of shaded area to be entered and the areas to be tiled calculated.

Algorithm

TileCalculation
    read room length
    read room width
    non tiling area:= 0

    read shaded length
    while shaded length > 0 do {continue to enter dimensions until shaded length = 0}
        read shaded width
        non tiling area:= non tiling area + shaded length * shaded width
        read shaded length {ensure that there is a way to exit the loop}
    endwhile

area to tile:= room length * room width - non tiling area
write area to tile
End.

Data Item Table

Data Item	Program name	Size/Type	Range
Room length	roomLength	float
Room width	roomWidth	float
Non tiling area	nonTiling	float
Shaded length	shadedLength	float
Shaded width	shadedWidth	float
Area of tile	areaToTile	float

PROGRAM: tilewhle.cpp