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  1. #1
    Registered User
    Join Date: Jan:2012
    Location: Sofia
    Posts: 3

    Java çà íà÷èíàåùè, îáÿñíåíèå íà çàäà÷à

    Çäðàâåéòå, îò ñêîðî ñå çàíèìàâàì ñ JAVA ãîòâÿ ñå çà èçïèòè â ìîìåíòà, è ñðåùíàõ ïðîáëåì ñúñ çàäà÷è ñâúðçàíè ñ ïðèîðèòåòè è èçðàçè òóê ùå äàì åäíàòà çàäà÷à, è ùå ïîìîëÿ àêî íÿêîé èìà âðåìå äà ìè îáÿñíè ðåä ïî ðåä êàê ñå ïðåñìÿòà ñàìèÿò èçðàç, çíàì ÷å ïúðâî êîìïèëàòîðà ïðåñìÿòà ïðåôèêñà è ñóôèêñà è ,÷å "à = à++" íå ñå âçèìà ïîä âíèìàíèå â ñëó÷àÿ, êàêòî ,è ÷å "/=" å â äúíîòî íà ïðèîðèòåòèòå. Ñìåòíàõ ÿ ïî äîñòà ðàçëè÷íè íà÷èíè çàäà÷àòà è íå ïîëó÷àâàì ïðàâèëíîòî ÷èñëî íàêðàÿ. Çàäà÷àòà å ñëåäíàòà:

    int a=6, b=5, c=2, d=100;

    a=a++;

    d/= 3+ ++a / c % b++ / 2. - 2.5;

    System.out.println(d);

  2. #2
    Math Lover haho's Avatar
    Join Date: Apr:2006
    Location: Ïëîâäèâ
    Posts: 695
    Íå ïèøà Java àìà âñå ïàê ìèñëÿ, ÷å òîâà ìîãà äà ãî îáÿñíà.

    int a=6, b=5, c=2, d=100;

    a=a++; // íèùî íå ñå ñëó÷âà

    d/= 3+ ++a / c % b++ / 2. - 2.5;
    Ïúðâî ñ íàé-âèñîê ïðèîðèòåò å ++.
    a ñå èíêðåìåíòèðà äî 7, à b ñè îñòàâà 5
    Ñëåäâàò / % îò ëÿâî íà äÿñíî
    d = 100 / (3 + 7/2%5/2.0 - 2.5) // 7/2 å äåëåíå íà integers êîåòî âîäè äî 3
    d = 100 / (3 + 3%5/2.0 - 2.5) // îñòàòúêà îò 3 äåëåíî íà 5 å 3
    d = 100 / (3 + 3/2.0 - 2.5)
    d = 100 / (3 + 1.5 - 2.5)
    d = 100 / (4.5 - 2.5)
    d = 100 / (2.0)
    d = 50.0
    It seems that perfection is attained not when there is nothing more to add, but when there is nothing more to remove.

  3. #3
    Registered User
    Join Date: Jan:2012
    Location: Sofia
    Posts: 3
    Ìíîãî áëàãîäàðÿ çà îòãîâîðà èìàì äà ÷åðïÿ !

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