proc string_proc(): string =
discard
proc int_proc(): int =
discard
proc float_proc(): float =
discard
proc bool_proc(): bool =
discard
echo " string型を宣言: ", string_proc()
echo " int型を宣言: ", int_proc()
echo " float型を宣言: ", float_proc()
echo " bool型を宣言: ", bool_proc()
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