The chifukwa kuzungulira mu Php

Imodzi mwa ntchito zikuluzikulu za makompyuta ndi processing ndalama zambiri zokhudza anthu ntchito imeneyi inafunika ndalama yaikulu kwambiri ya nthawi. Kuchita m'zinthu zovuta Machining anali anatulukira. Taganizirani mkombero kuti. Nthawi zina, m'pofunika kubwereza ena zidutswa za malamulo ena kangapo, pamene m'zinthu kuwapulumutsa. The chifukwa kuzungulira - mmodzi wa anthu otchuka.

Companies, omwe kawirikawiri amagwiritsidwa ntchito mkombero kuti

Choyamba, tiyeni tione gulu la ntchito kaŵirikaŵiri limagwiritsa ntchito m'zinthu. Iwo amatchedwa increment ndi decrement. increment woyendetsa olembedwa pluses awiri (++), izo akuchita ponso wina. Decrement mwake, amachepetsa mtengo wa 1, kutanthauza minuses awiri (-). ntchito izi ntchito monga kauntala. Ngati pa Pre-decrement / increment ndi kuchepa / kuwonjezeka variable, ndiyeno mtengo uwu ntchito. The POST-decrement / increment ndi variable koyamba ntchito, ndipo kenako pali kuchuluka kapena kuchepa.

malembedwe

The chifukwa kuzungulira umabala lamulo kuphedwa chipika malinga ndi chikhalidwe zina ndi zoona. M'mawu ena, ndi malamulo, chimene mobwerezabwereza mpaka mwachindunji chikhalidwe ndi kuphedwa.

Akukhulupirira kuti zimene zimachitika kuti mmodzi wa zovuta mu Php. malembedwe ake ali motere:

pakuti (chast_1; chast_2; chast_3)

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Makamaka chidwi n'chakuti mkati parentheses lapansi. Monga mukuonera, pali zigawo zitatu. Amawapatula ndi semicolon a. Kodi chast_1 Php amachita zimene iye anauzidwa. Ngati pali mawu akuti, ndiye anaphedwa. Monga ulamuliro, pali adamulowetsa kauntala. Mu chasti_2 ndi ngati, ndiye kufufuza ngati zili zoona kuti mu chasti_1 ngati inde (oona), ndiye Php udzapereka malamulo ndi mkati braces ndi. Gawo lachitatu akuwonjezeka kapena kuchepa kwa kauntala.

Taganizirani mkombero kuti Php mu Chitsanzo

Mu mkombero chasti_1 variable $ amayikidwa kuti 0. Kenako, kufufuza ngati $ ndi zochepa, 20? Ngati zochepa, ndiye adzathamanga malamulo ali mu kuzungulira. Chitsanzo wathu akusonyeza: "chingwe Titha nthawi 20", ndiye gawo lachitatu ndi ponso $ wa 1. Pamenepo, pali kubwerera ku gawo lachiwiri, kachiwiri kufufuzidwa osachepera 20 yathu variable kapena ayi. Zochepa? Pamenepo pali lamulo (linanena bungwe mzere) mpaka $ sadzathandiza oposa 20.

ntchito

Kuthamanga ntchito yamasewera. Pali ena malingaliro: "Hi, anthu" M'pofunika vertically kutapa mawu amenewa. Kodi zikuchitika motani izo?

Tiyenera kuthetsa vuto Php kuzungulira chifukwa. Tikukumbukira ntchito strlen (), amene akubwerera kutalika kwa mzere.

Mu Chitsanzo 1, kwalembedwa - Kodi si kuchita? Izi ndi kachidindo wabwino, zimachitikadi. Koma zimenezi n'zosatheka. Kuti timvetse mfundoyi, yang'anani mmene Php. Choyamba, perekani variable $ ine 0. Next ndi chiwerengero cha anthu a chingwe ndi kutsimikizira kuti anapatsidwa kuchuluka zosakwana ziro. Iwo iterates malamulo pakubwera chimaliziro cha kalata yoyamba. Ndiye $ ine incremented ndi 1 panthawi anayesedwa chingwe zizindikiro, afufuze kuti $ ine ang'onoang'ono kuchuluka analandira kachiwiri amapita malamulo kuphedwa. Nthawi iliyonse anachita strlen (), ndi chiwerengero chiwerengero cha zizindikiro. Nkokoma kuti tili ndi chingwe yaitali sakutero.

Ngati mzere ndi malo amodzi, ntchito zina zimene mungachite.

Mu chimake choyamba, strlen ntchito kuchotsedwa mkombero kuti.

Mu chimake chachiwiri, onse anapitiriza mu kuzungulira chifukwa.

Mothandizidwa ndi kwa kuzungulira mu Php, mukhoza masamu ambiri!