Programmer-Defined Functions, Call-by-Value, Multiple Files

Lab Assignment

1. Basal metabolic rate. Study "Observing Program Stack" described here. As you program your project below, demonstrate to the lab instructor observing variables local to several function frames.

   Create a project titled Lab5_BMR with a single file titled bmr.cpp The program should calculate the person's Basal Metabolic Rate - the number of calories per day a person's body needs to function. Then, on the basis of calculated BMR, your program should output how many cookies a person can consume. A medium-size cookie contains 142 calories.

   The BMR formula is as follows:

   • for women:

       655 + (4.3 x weight in pounds) + (4.7 x height in inches) - (4.7 x age in years)
       

   • for men:

       66 + (6.3 x weight in pounds) + (12.9 x height in inches) - (6.8 x age in years)
       

   Depending on gender, BMR should be calculated by functions bmrWomen() and bmrMen() that both accept three parameters: "weight in pounds", "height in inches" and "age in years" and return the BMR. Note that the BMR has a fractional part.

   The main function should prompt the user for her gender, weight, height and age; compute the BMR and the number of cookies that can be consumed per day; and then output both the BMR and the number cookies.

   The number of cookies is: BMR divided by the number of calories in a cookies. Fractional number of cookies can be dropped. The number of calories per cookie (142) should be put in a named constant.

   If the number of cookies is greater than 3, your program should print: "too many cookies!"

   On the basis of the user's gender, main() function should decide whether to invoke bmrWomen() or bmrMen(). The user should input her height in feet and inches. The main() function should compute the total number of inches (one foot has 12 inches) and pass it to the bmr functions.

   Make sure to use the bmr function prototypes and put the function definitions below the main function definition.

2. Figures. Create a project titled Lab5_Figures. This project shall contain multiple files. Write a program that repeatedly asks the user to select figure size, paint character and then the figure. The figures are a square, a slash or a crossed square. For a slash, the program needs to clarify if it is a forward or back slash. For a square, it needs to clarify if it is a filled or hollow square. No clarifying questions need to be asked about the crossed square. Then, the program should print the requested figure. The program should quit if the user inputs an invalid option. See an example dialog below (user input is in bold):

   select size: 7
   select paint character: %
   1. square
   2. slash
   3. crossed square
   select figure: 1
   filled, hollow [f/h]: h
   
   %%%%%%%
   %     %
   %     %
   %     %
   %     %
   %     %
   %%%%%%%
   
   select size: 3
   select paint character: +
   1. square
   2. slash
   3. crossed square
   ...
   

   You can reuse your code from the Looping Lab. Place figure-printing code in five separate functions: filledSquare(), hollowSquare(), slash(), backslash(), and crossedSquare(). Each function should accept two paramters: an integer size of the figure and the paint character. The function should return no value (be a void-function). Create three separate files figures.cpp, figures.hpp, and figuresInput.cpp. Place the square, slash and crossed square function definitions in figures.cpp and their prototypes in figures.hpp. Make sure that the header file is protected against multiple inclusion. Place the main() function in figuresInput.cpp

Make sure your programs adhere to proper programming style. Submit your projects to the subversion repository. Do not forget to verify your submission on the web.