RosettaCodeData/Task/Mutual-recursion/Seed7/mutual-recursion.seed7

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$ include "seed7_05.s7i";
const func integer: m (in integer: n) is forward;
const func integer: f (in integer: n) is func
result
var integer: res is 0;
begin
if n = 0 then
res := 1;
else
res := n - m(f(n - 1));
end if;
end func;
const func integer: m (in integer: n) is func
result
var integer: res is 0;
begin
if n = 0 then
res := 0;
else
res := n - f(m(n - 1));
end if;
end func;
const proc: main is func
local
var integer: i is 0;
begin
for i range 0 to 19 do
write(f(i) lpad 3);
end for;
writeln;
for i range 0 to 19 do
write(m(i) lpad 3);
end for;
writeln;
end func;