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by int_19h
1246 days ago
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Early subroutines were really just a branch/return - no stack frames and thus no proper argument passing or recursion or locals. If you've seen a BASIC dialect with GOSUB in it, that's pretty much it. It's a bit more structured than simple jumps, but still much lower level than C functions. Structural programming is traditionally considered subroutines + conditionals + loops. In its purest form, it also means no branches other than the ones implicit in this list (i.e. not only no goto, but also no return, no break/continue etc). |
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