Compiler

Questions about compilers, probably for my friend Kevin who had wrote an assembler for fun and was telling me about it.

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Why do people say "compile java" or "compile c"? It's as if there's no mention of an assembler.
For referring to a label, you had it on the board: 

Here: add ........
          Sub ........
          Beg $2, $3, here 

My question is where would you but the operation add and sub so that they're not executed twice. Do you have to have a skip or a here that goes to the line that starts "beg"?