Computer Programming Concepts and Visual Basic David I. Schneider

98 Computer Programming Concepts and Visual Basic
FIGURE 3-8 Sample Run for Programming Project 1
2. About seven million notebook computers were sold during 1997. Table 3.2
gives the market share for the four largest vendors. Write a program that displays
the number of computers sold by each of the Big Four. The input and output
should be handled by Sub procedures and the number of computers
calculated by a Function procedure.
TABLE 3.2
1997 Market Shares of the Top Notebook Vendors
Source: PC Magazine, January 20, 1998.
Company Market Share
Toshiba 20%
IBM 11%
Compaq 9%
Dell 6%
3. Table 3.3 gives the advertising expenditures (in millions of dollars) for the four
most advertised soft drink brands during the first nine months of 1995 and
1996. Write a program that displays the percentage change in advertising for
each brand. Sub procedures should be used for input and output and the percentage
change should be computed with a Function procedure. Note: The percentage
change is 100 * ([1996 expenditure] – [1995 expenditure]) / [1995
expenditure].
TABLE 3.3
Most Advertised Soft Drinks
Brand 1995 Expenditure 1996 Expenditure
Coca-Cola classic 60.7 121.6
Pepsi-Cola 94.8 83.0
Diet Coke 43.7 70.0
Dr. Pepper 46.3 51.8
Source: Beverage World, March 1997.
4. A fast-food vendor sells pizza slices ($1.25), fries ($1.00), and soft drinks
($.75). Write a program to compute a customer’s bill. The program should
request the quantity of each item ordered in a Sub procedure, calculate the total
cost with a Function procedure, and use a Sub procedure to display an itemized
bill. A sample output is shown in Figure 3-9.