2-1Functions

Reading

Read the first page below completely, and at least the "Overloaded Functions" section of the second. You may read the rest of the second page if you wish.

• Functions
• Overloads and Templates

Extra Reading

• CProgramming page

Companion Video

Practice

Once you feel comfortable with the above content, complete the following practice programs.

Temperature Converter

Write a function celsius() to convert degrees Fahrenheit to degrees Celsius (The conversion formula is °C = 5/9 * (°F - 32)). Use it to print a Fahrenheit-to-Centigrade table for -40 to 220 degrees Fahrenheit, in increments of 10 degrees.

It is important to note that the expression 5/9 is 0 (integer division), so you need to divide 5.0 by 9.0 instead.

Extra Practice

Do any of the following:

• Allow the user to input a desired temperature to convert
  • You can also have them input a starting number and an ending number, and get a table from that.
    • WARNING! This is tricky!
• Convert from Celsius to Fahrenheit

Rectangle

Write a function createrect(int x, int y) that creates a rectangle out of x's.

For example, if you call createrect(5,4) you will receive:

xxxxx
x   x
x   x
xxxxx

HINT: you will need to use nested for loops like you did in the Right Triangle program.

Extra Practice

Rewrite the program so that it can do any of the following:

• Allow the user to change the size of the rectangle
• Allow the user to create multiple rectangles in the same run (meaning the program cannot exit)
• Allow the user to put a message in the rectangle without changing its dimensions or exceeding boundaries (pre-defined or user-defined dimensions, but the rectangle must stay a rectangle)
  • If the dimensions are too small for the message to fit, do not print anything. Instead, tell the user they cannot fit the message inside that rectangle, and have them try again.