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printdecl(vars) := (
sprint("double", first(vars)),
for v in rest(vars) do sprint(",", v),
sprint(";"))$
printdef(expr) := sprint(first(expr), "=", second(expr), ";")$
block2c(expr) :=
if ?equal(op(expr), block) then (
printdecl(first(expr)),
for d in reverse(rest(reverse(rest(expr)))) do printdef(d),
sprint("return", string(last(expr)), ";"))
else
sprint("return", string(expr), ";")$
expr2c(funcname, argstr, expr) := (
sprint("double", funcname, "(", argstr, ") {"),
block2c(subst(pow, "^", optimize(expr))),
sprint("}", "
"))$
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