Excel macro, if > 0 add 1 to cell!?!?

Hi all

I am fairly new to writing macros and am completely baffled by what you guys know.

I have been reading for hours on various websites etc for something that i could manipulate into what i need but whatever i attempt to do so it fails.

Example:

I have data in a column (A),the lenght varies from from workbook to workbook. I want to loop through the data in this column and whenever the data is greater than 0 i want to add 1 to a specific cell (C4)

The logic is very simple but i just have no idear how to write this in code.

Any suggestions will be greatly appreciated.