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>>2940 名無し さん、ありがとうございます。 sprintf は四捨五入なんですね。 ということはあらかじめ 0.005 を引いておけばよい？ −−−−−−−−−−プログラム−−−−−−−−−−−−−−＞８ #! perl while (<DATA>) { chomp; $tanka = $_; # ドル print "tanka = $tanka "; $tanka -= 0.005; # 切り捨てたいから $kosuu = 1; # 個 $uriage100 = $tanka * $kosuu * 100; # 売上の 100 倍 $uriage = $uriage100 / 100; $uriage = sprintf "%.2f", $uriage; print "uriage = $uriage\n"; } −−−−−−−−−−プログラム終わり−−−−−−−−−−−＞８ 実行結果。 > keisan tanka = 10000.88 uriage = 10000.88 tanka = 10000.881 uriage = 10000.88 tanka = 10000.882 uriage = 10000.88 tanka = 10000.883 uriage = 10000.88 tanka = 10000.884 uriage = 10000.88 tanka = 10000.885 uriage = 10000.88 tanka = 10000.886 uriage = 10000.88 tanka = 10000.887 uriage = 10000.88 tanka = 10000.888 uriage = 10000.88 tanka = 10000.889 uriage = 10000.88 なんかできてるっぽい、、？ __DATA__ 10000.88 10000.881 10000.882 10000.883 10000.884 10000.885 10000.886 10000.887 10000.888 10000.889 |