RosettaCodeData/Task/First-class-environments/Julia/first-class-environments.julia

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const jobs = 12
mutable struct Environment
seq::Int
cnt::Int
Environment() = new(0, 0)
end
const env = [Environment() for i in 1:jobs]
const currentjob = [1]
seq() = env[currentjob[1]].seq
cnt() = env[currentjob[1]].cnt
seq(n) = (env[currentjob[1]].seq = n)
cnt(n) = (env[currentjob[1]].cnt = n)
function hail()
print(lpad(seq(), 4))
if seq() == 1
return
end
cnt(cnt() + 1)
seq(isodd(seq()) ? 3 * seq() + 1 : div(seq(), 2))
end
function runtest()
for i in 1:jobs
currentjob[1] = i
env[i].seq = i
end
computing = true
while computing
for i in 1:jobs
currentjob[1] = i
hail()
end
println()
for j in 1:jobs
currentjob[1] = j
if seq() != 1
break
elseif j == jobs
computing = false
end
end
end
println("\nCOUNTS:")
for i in 1:jobs
currentjob[1] = i
print(lpad(cnt(), 4))
end
println()
end
runtest()