Things you need to know to complete homework3
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Read chapter 3 in the K&R C book!  This chapter covers C control
structures like 'if' and 'for'.  Also, read the portions of chapter 4
explaining C arrays.  This material was covered in class, but the book
provides a very complete specification as well as program examples.

The syntax of the 'if' control structure, for instance, is as follows:

if(<expr>)
	<statement1>
else
	<statement2>

Where <expr> is any expression that results in a zero or non-zero
value.  <statement1> and <statement2> are simply statements, and
recall that statements can be contained in blocks by wrapping them in
curly braces "{}".  This needs to be done if you wish to execute multiple statements inside a control structure, for example:

int a=10;
int b=20;
int c;

if (a < b) {
	printf("a is less than b!\n");
	c = a + b;
	printf("also, a + b is: %d\n", c);
} else  {
	printf("a is greater than or equal to b\n");
}

Since the above example had three statements that were supposed to
execute if the if condition were satisfied, we use curly braces to
define the statement block.

We can use a 'for'loop to iterate through C arrays:

int i;
float myarray[4];

for (i=0; i<4; i++) {
	myarray[i] = 1;
	printf("just set myarray at index %d to %d\n", i, myarray[i]);
}

The same concept of statement blocks extends to loop structures, where
if we want multiple statements to execute inside the loop, we must
enclose them in curly braces.

email nurmi@cs.ucsb.edu or tan@cs.ucsb.edu with questions! Start
early!  Come to office hours or schedule a time when we can meet to
get help (via email)!