All I think I need now is a C algorithm that does the following with the grid square input:
1. Checks that the length of the grid square variable is exactly four characters long 2. Check that the first two characters are uppercase letters a...z 3. Check that the last two characters are numbers 0...9 4. Gracefully asks for the input again if the above conditions are not met. 73, Mike www.w0btu.com
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