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PL/I 練習問題

Posted at

問題1:偶数・奇数の判定

目的:条件分岐と入出力の練習
内容: ユーザーに整数を入力させ、偶数か奇数かを判定して表示する。

 回答
TEST: PROCEDURE OPTIONS(MAIN);
  DECLARE I FIXED;

  PUT SKIP LIST('数字を入力してください');
  GET LIST(I);

  IF MOD(I,2)=0 THEN
    PUT SKIP LIST('偶数です');
  ELSE
    PUT SKIP LIST('奇数です');
END TEST;

問題2:10個の整数の平均値を求める

目的:配列、ループ、計算の基本練習
内容: 10個の整数を入力させて配列に格納し、平均値を求めて出力する。

 回答
TEST: PROCEDURE OPTIONS(MAIN);
 DECLARE NUM(10) FIXED;
 DECLARE TOTAL FIXED;
 DECLARE AVE FIXED;
 DECLARE I FIXED;

 PUT SKIP LIST('10個の整数を入力してください:');

 DO I = 1 TO 10;
  GET LIST(NIM(I));
  TOTAL = TOTAL + NUM(I);
END;

  AVE = TOTAL / 10

  PUT SKIP LIST('平均値は',AVE,'です。');
END TEST;

問題3:文字列を逆順にして出力

目的:文字列処理の基本
内容: 文字列を1つ入力し、それを逆順に表示するプログラムを作る。

 回答
TEST: PROCEDURE OPTIONS(MAIN);
  DECLARE S CHAR(100) VARYING;
  DECLARE LEN FIXED;
  DECLARE I FIXED;

  PUT SKIP LIST('文字列を入力してください:');
  GET EDIT(S) (A);

  LEN = LENGTH(S);

  PUT SKIP LIST('逆順に表示:');
  DO I = LEN TO 1 BY -1;
    PUT EDIT(S(I:1)) (A);
  END;

  PUT SKIP;
END TEST;
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