Week 02 Tutorial Questions

A leap year is a year that has 366 days instead of 365. There is a leap year every year divisible by four except for years which are both divisible by 100 and not divisible by 400.

For more detail information of leap years see: Leap Year

Draw a simple flow chart showing the branches of possibilities to decide if a year is a Leap Year.

For some humourous information about flow charts see: Flow Charts (xkcd).

Can you then write some simple code using if/else statements in C that decides if a year is a Leap Year? (hint: modulus is a useful way to decide whether a number is divisible by another) This code question will be continued in this week's lab, so try to remember or keep a copy/photo of the diagram and code you've written.

The value of C  arithmetic operations depends on the types of the operand. If the types of the operands differ, C automatically converts the types as appropriate.

Determine the value of each expression and sub-expression:

• 1 / 2 * 500
• 1 / 2.0 * 500
• (17 / 5) * 5 + (17 % 5)
• (12 - 17) % 6 - 4

The and (&&) and or (||) operators can be used to combine multiple statments into one (such as the statements created in the leap year activity). Write either a true or false statement about this dog and share with the class. Are your classmates' statments true or false?

For example:

• The dog is pink || blue
• The dog is pink && blue

You may also wish to use the "not" operator (!) to make your statements more interesting, for example:

• The dog is pink || !blue
• The dog is pink && !blue

scanf() and printf() are similar functions.

printf(): print to the terminal

scanf(): scan in from the terminal

Fill in the following table with the correct syntax to print out a variable called a with value 12/ scan in a variable called a.

Write a program rectangle_area.c that scans in 2 integers which are the side-length of a rectangle, and then prints the area of the rectangle.