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csc201 20100929 Notes

Posted in csc201 by bnmng on 2010 09/29

Passed out homework due Wed Oct 6

Reading Assignment: Read Chapter 9.1 to 9.3, 10.1 & 10.2

Today: Chapter 8,
function decomposition
syntax & semantics
parameters
call by value and call by references
files as arguments.
Chapter 9: Value yielding functions
boolean function

When to use functions? Not to improve the efficiency of the machine.
a) To make code easier to reuse
b) To make the task easier by breaking it down.

Functions should be specific. If you have a function that multiplies, it shouldn’t also write. Keep separate functions for separate tasks.

Example Function with Arguments


void PrintLines (int) ; //Prototype
int main ();
{
	PrintLines(2);
	cout <<" Welcome Home!" << endl;
        PrintLines(4);
        cin.get(); cin.get();
        return 0;
}
void PrintLines (int numLines)
{
	for (int count = 1; count <= numLines; count++)
           count << "*******************" << endl;

}

Calling by reference
When we use call by reference, you can think of it as passing an address.

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