{"id":173,"date":"2025-05-12T07:17:30","date_gmt":"2025-05-12T07:17:30","guid":{"rendered":"https:\/\/infmix.ro\/a6a\/?page_id=173"},"modified":"2025-05-12T07:19:34","modified_gmt":"2025-05-12T07:19:34","slug":"m5-l2-ce-este-o-variabila","status":"publish","type":"page","link":"https:\/\/infmix.ro\/a6a\/modul-5-limbaje-de-programare\/m5-l2-ce-este-o-variabila\/","title":{"rendered":"M5 L2 Ce este o variabil\u0103?"},"content":{"rendered":"\n

\u00cen C++, o variabil\u0103<\/strong> este un spa\u021biu de memorie care stocheaz\u0103 o valoare ce poate fi utilizat\u0103 \u0219i modificat\u0103 \u00een program. Fiecare variabil\u0103 are un nume<\/strong> (identificator), un tip de date<\/strong> \u0219i o valoare<\/strong>.<\/p>\n\n\n\n

Sintaxa de baz\u0103:<\/p>\n\n\n\n

tip_de_date nume_variabila = valoare_initiala;<\/code><\/pre>\n\n\n\n
Exemple:<\/p>\n\n\n\n
int <\/mark>varsta = 25<\/mark>;           \/\/ o variabil\u0103 \u00eentreag\u0103\nfloat <\/mark>inaltime = 1.75<\/mark>;     \/\/ o variabil\u0103 cu virgul\u0103 mobil\u0103\nchar <\/mark>litera = 'A'<\/mark>;         \/\/ o variabil\u0103 caracter\nbool <\/mark>esteElev = true<\/mark>;   \/\/ o variabil\u0103 boolean\u0103<\/code><\/pre>\n\n\n\n
Explica\u021bii:<\/h3>\n\n\n\n
    \n
  • int<\/code><\/strong>, float<\/code><\/strong>, char<\/code><\/strong>, bool<\/code><\/strong> sunt tipuri de date.<\/li>\n\n\n\n
  • varsta<\/code><\/strong>, inaltime<\/code><\/strong>, etc. sunt numele variabilelor.<\/li>\n\n\n\n
  • Valorile (25<\/code>, 1.75<\/code>, 'A'<\/code>, true<\/code>) pot fi modificate pe parcursul programului.<\/li>\n<\/ul>\n\n\n\n
    Caracteristici:<\/mark><\/h3>\n\n\n\n
      \n
    • O variabil\u0103 trebuie s\u0103 fie declarat\u0103 \u00eenainte de a fi utilizat\u0103.<\/mark><\/li>\n\n\n\n
    • Numele variabilei trebuie s\u0103 \u00eenceap\u0103 cu o liter\u0103 sau un underscore (_), nu cu o cifr\u0103.<\/mark><\/li>\n\n\n\n
    • Tipul determin\u0103 ce fel de date poate con\u021bine \u0219i c\u00e2t spa\u021biu ocup\u0103 \u00een memorie.<\/li>\n<\/ul>\n\n\n\n
      Iat\u0103 un exemplu simplu de program C++ care folose\u0219te variabile:<\/p>\n\n\n\n
      #include <iostream>\nusing namespace std;\n\nint main() {\n    \/\/ Declararea variabilelor\n    int varsta = 20;\n    float inaltime = 1.75;\n    char initiala = 'M';\n    bool esteElev = true;\n\n    \/\/ Afi\u0219area valorilor\n    cout << \"Varsta: \" << varsta << endl;\n    cout << \"Inaltime: \" << inaltime << \" metri\" << endl;\n    cout << \"Initiala: \" << initiala << endl;\n    cout << \"Este elev: \" << (esteElev ? \"Da\" : \"Nu\") << endl;\n\n    return 0;\n}<\/code><\/pre>\n\n\n\n
      Ce face programul:<\/h3>\n\n\n\n
        \n
      • Declar\u0103 4 variabile de tipuri diferite.<\/li>\n\n\n\n
      • Le ini\u021bializeaz\u0103 cu valori.<\/li>\n\n\n\n
      • Afi\u0219eaz\u0103 valorile folosind cout<\/code>.<\/li>\n<\/ul>\n\n\n\n
        Rezultatul la rulare:<\/h3>\n\n\n\n
        Varsta: 20\nInaltime: 1.75 metri\nInitiala: M\nEste elev: Da<\/code><\/pre>\n\n\n\n
        Tem\u0103:<\/p>\n\n\n\n
        S\u0103 se modifice programul pentru a afi\u0219a valori reale pentru tine. <\/p>\n","protected":false},"excerpt":{"rendered":"
        \u00cen C++, o variabil\u0103 este un spa\u021biu de memorie care stocheaz\u0103 o valoare ce poate fi utilizat\u0103 \u0219i modificat\u0103 \u00een program. Fiecare variabil\u0103 are un nume (identificator), un tip de date \u0219i o valoare. Sintaxa de baz\u0103: Exemple: Explica\u021bii: Caracteristici: Iat\u0103 un exemplu simplu de program C++ care folose\u0219te variabile: Ce face programul: Rezultatul la […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":160,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_FSMCFIC_featured_image_caption":"","_FSMCFIC_featured_image_nocaption":"","_FSMCFIC_featured_image_hide":"","footnotes":""},"class_list":["post-173","page","type-page","status-publish","hentry"],"yoast_head":"\nM5 L2 Ce este o variabil\u0103? - Clasa a VI-a InfMix<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/infmix.ro\/a6a\/modul-5-limbaje-de-programare\/m5-l2-ce-este-o-variabila\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"M5 L2 Ce este o variabil\u0103? - Clasa a VI-a InfMix\" \/>\n<meta property=\"og:description\" content=\"\u00cen C++, o variabil\u0103 este un spa\u021biu de memorie care stocheaz\u0103 o valoare ce poate fi utilizat\u0103 \u0219i modificat\u0103 \u00een program. Fiecare variabil\u0103 are un nume (identificator), un tip de date \u0219i o valoare. 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