Ordenamiento por selección
#Ordenamiento de burbuja
a = [55,86,48,16,82]
n = a.size
puts a.to_s
for i in 1..n
for j in 0..n-1-i
if a[j] > a[j+1]
x = a[j+1]
a[j+1] = a[j]
a[j] = x
end
end
end
puts a.to_s