Question

If you have downloaded this book’s source code from the companion Web site, you will find a partially written program named AreaRectangle.cpp in the Chapter 06 folder. (The companion Web site is at www.pearsonhighered.com/gaddis.) Your job is to complete the program. When it is complete, the program will ask the user to enter the width and length of a rectangle and then display the rectangle’s area.

Answer 1

The AreaRectangle.cpp program calculates the area of a rectangle after obtaining the length and width from user input. Areas of different rectangles can be compared using ratios. Conversions may be necessary for different units, with careful attention paid to significant figures.

Step-by-step explanation:

Completing the program AreaRectangle.cpp involves writing code that calculates the area of a rectangle. To find the area, you will need to request the user's input for the length and width of the rectangle. Once these dimensions are provided, you can calculate the area by multiplying the length by the width. This value gives you the area in square units.

When comparing the area of two rectangles or squares, you can express the comparison as a ratio. For example, if one square has an area of 9 square units and another has an area of 16 square units, the ratio of their areas is 9:16.

To handle different units or to scale areas, it's often necessary to convert measurements using conversion factors. In physics and engineering, it's important to convert to the correct units, like square meters, and present the answer with the correct number of significant figures. Exact numbers, like the 1 in a conversion factor 1m = 100cm, do not affect the significant figures count.