{"id":3235,"date":"2025-03-27T23:51:42","date_gmt":"2025-03-27T15:51:42","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=3235"},"modified":"2025-03-27T23:51:42","modified_gmt":"2025-03-27T15:51:42","slug":"c-%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b%ef%bc%88data-types%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/27\/c-%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b%ef%bc%88data-types%ef%bc%89\/","title":{"rendered":"C++ \u6570\u636e\u7c7b\u578b\uff08Data Types\uff09"},"content":{"rendered":"\n

C++ \u662f\u4e00\u79cd\u5f3a\u7c7b\u578b\u8bed\u8a00<\/strong>\uff0c\u53d8\u91cf\u5728\u4f7f\u7528\u524d\u5fc5\u987b\u58f0\u660e\u5176\u7c7b\u578b\u3002C++ \u63d0\u4f9b\u4e86\u591a\u79cd\u6570\u636e\u7c7b\u578b\uff0c\u5305\u62ec\u57fa\u672c\u6570\u636e\u7c7b\u578b<\/strong>\u3001\u7528\u6237\u81ea\u5b9a\u4e49\u7c7b\u578b<\/strong>\u548c\u590d\u5408\u6570\u636e\u7c7b\u578b<\/strong>\u3002<\/p>\n\n\n\n

\n\n\n\n

1. \u57fa\u672c\u6570\u636e\u7c7b\u578b<\/strong><\/h2>\n\n\n\n

C++ \u63d0\u4f9b\u4ee5\u4e0b\u57fa\u672c\u6570\u636e\u7c7b\u578b\uff1a<\/p>\n\n\n\n

\u6570\u636e\u7c7b\u578b<\/th>\u5173\u952e\u5b57<\/th>\u5927\u5c0f\uff08\u901a\u5e38\uff09<\/th>\u53d6\u503c\u8303\u56f4<\/th><\/tr><\/thead>
\u6574\u6570\u7c7b\u578b<\/strong><\/td>int<\/code><\/td>4 \u5b57\u8282<\/td>-2,147,483,648 ~ 2,147,483,647<\/td><\/tr>
\u5b57\u7b26\u7c7b\u578b<\/strong><\/td>char<\/code><\/td>1 \u5b57\u8282<\/td>-128 ~ 127 \u6216 0 ~ 255<\/td><\/tr>
\u6d6e\u70b9\u6570\u7c7b\u578b<\/strong><\/td>float<\/code><\/td>4 \u5b57\u8282<\/td>3.4E-38 ~ 3.4E+38<\/td><\/tr>
\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u6570<\/strong><\/td>double<\/code><\/td>8 \u5b57\u8282<\/td>1.7E-308 ~ 1.7E+308<\/td><\/tr>
\u957f\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u6570<\/strong><\/td>long double<\/code><\/td>16 \u5b57\u8282<\/td>3.4E-4932 ~ 1.1E+4932<\/td><\/tr>
\u5e03\u5c14\u7c7b\u578b<\/strong><\/td>bool<\/code><\/td>1 \u5b57\u8282<\/td>true<\/code>\uff081\uff09\u6216 false<\/code>\uff080\uff09<\/td><\/tr>
\u7a7a\u7c7b\u578b<\/strong><\/td>void<\/code><\/td>–<\/td>\u65e0\u8fd4\u56de\u503c<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\n

\u26a0 \u4e0d\u540c\u7f16\u8bd1\u5668\u53ef\u80fd\u6709\u4e0d\u540c\u7684\u5927\u5c0f\u5206\u914d<\/strong>\uff0c\u53ef\u4ee5\u4f7f\u7528 sizeof()<\/code> \u51fd\u6570\u67e5\u770b\u5177\u4f53\u5927\u5c0f\u3002<\/p>\n<\/blockquote>\n\n\n\n

\u793a\u4f8b\uff1a<\/p>\n\n\n\n

#include <iostream>\nusing namespace std;\n\nint main() {\n    int a = 10;\n    char b = 'A';\n    float c = 3.14;\n    double d = 3.14159;\n    bool e = true;\n\n    cout << \"int: \" << a << \", \u5927\u5c0f: \" << sizeof(a) << \" \u5b57\u8282\" << endl;\n    cout << \"char: \" << b << \", \u5927\u5c0f: \" << sizeof(b) << \" \u5b57\u8282\" << endl;\n    cout << \"float: \" << c << \", \u5927\u5c0f: \" << sizeof(c) << \" \u5b57\u8282\" << endl;\n    cout << \"double: \" << d << \", \u5927\u5c0f: \" << sizeof(d) << \" \u5b57\u8282\" << endl;\n    cout << \"bool: \" << e << \", \u5927\u5c0f: \" << sizeof(e) << \" \u5b57\u8282\" << endl;\n\n    return 0;\n}<\/code><\/pre>\n\n\n\n
\n\n\n\n
2. \u4fee\u9970\u7b26\uff08Modifiers\uff09<\/strong><\/h2>\n\n\n\n
C++ \u5141\u8bb8\u4f7f\u7528 \u4fee\u9970\u7b26<\/strong> \u6765\u8c03\u6574\u6570\u636e\u7c7b\u578b\u7684\u8303\u56f4\u548c\u5927\u5c0f\u3002<\/p>\n\n\n\n
\u4fee\u9970\u7b26<\/th>\u8bf4\u660e<\/th><\/tr><\/thead>
signed<\/code><\/td>\u9ed8\u8ba4\u4fee\u9970\u7b26\uff0c\u5141\u8bb8\u6b63\u8d1f\u6570<\/td><\/tr>
unsigned<\/code><\/td>\u4ec5\u5141\u8bb8\u975e\u8d1f\u6570<\/td><\/tr>
short<\/code><\/td>\u77ed\u6574\u578b\uff0c\u5360\u7528\u66f4\u5c11\u7a7a\u95f4<\/td><\/tr>
long<\/code><\/td>\u957f\u6574\u578b\uff0c\u5360\u7528\u66f4\u591a\u7a7a\u95f4<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\u793a\u4f8b\uff1a<\/p>\n\n\n\n
#include <iostream>\nusing namespace std;\n\nint main() {\n    unsigned int x = 100;  \/\/ \u53ea\u5141\u8bb8\u975e\u8d1f\u6570\n    short int y = -32768;  \/\/ \u5360\u7528 2 \u5b57\u8282\n    long int z = 1000000;  \/\/ \u5360\u7528 4 \u6216 8 \u5b57\u8282\n\n    cout << \"unsigned int: \" << x << \", \u5927\u5c0f: \" << sizeof(x) << \" \u5b57\u8282\" << endl;\n    cout << \"short int: \" << y << \", \u5927\u5c0f: \" << sizeof(y) << \" \u5b57\u8282\" << endl;\n    cout << \"long int: \" << z << \", \u5927\u5c0f: \" << sizeof(z) << \" \u5b57\u8282\" << endl;\n\n    return 0;\n}<\/code><\/pre>\n\n\n\n
\n\n\n\n
3. \u590d\u5408\u6570\u636e\u7c7b\u578b<\/strong><\/h2>\n\n\n\n
3.1 \u6570\u7ec4\uff08Array\uff09<\/strong><\/h3>\n\n\n\n
\u6570\u7ec4\u7528\u4e8e\u5b58\u50a8\u76f8\u540c\u7c7b\u578b\u7684\u591a\u4e2a\u503c<\/strong>\u3002<\/p>\n\n\n\n
int numbers[5] = {1, 2, 3, 4, 5};<\/code><\/pre>\n\n\n\n
3.2 \u6307\u9488\uff08Pointer\uff09<\/strong><\/h3>\n\n\n\n
\u6307\u9488\u7528\u4e8e\u5b58\u50a8\u53d8\u91cf\u7684\u5185\u5b58\u5730\u5740<\/strong>\u3002<\/p>\n\n\n\n
int a = 10;\nint* p = &a;<\/code><\/pre>\n\n\n\n
3.3 \u7ed3\u6784\u4f53\uff08Struct\uff09<\/strong><\/h3>\n\n\n\n
\u7ed3\u6784\u4f53\u7528\u4e8e\u5b58\u50a8\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e<\/strong>\u3002<\/p>\n\n\n\n
struct Student {\n    string name;\n    int age;\n    float score;\n};<\/code><\/pre>\n\n\n\n
3.4 \u679a\u4e3e\uff08Enum\uff09<\/strong><\/h3>\n\n\n\n
\u679a\u4e3e\u7528\u4e8e\u5b9a\u4e49\u4e00\u7ec4\u5177\u540d\u5e38\u91cf<\/strong>\u3002<\/p>\n\n\n\n
enum Color {RED, GREEN, BLUE};<\/code><\/pre>\n\n\n\n
\n\n\n\n
4. \u7c7b\u578b\u8f6c\u6362<\/strong><\/h2>\n\n\n\n
C++ \u652f\u6301 \u9690\u5f0f\u8f6c\u6362<\/strong> \u548c \u663e\u5f0f\u8f6c\u6362<\/strong>\u3002<\/p>\n\n\n\n
4.1 \u9690\u5f0f\u7c7b\u578b\u8f6c\u6362<\/strong><\/h3>\n\n\n\n
\u81ea\u52a8\u8f6c\u6362\u7c7b\u578b\uff08\u4f4e\u7cbe\u5ea6 \u2192 \u9ad8\u7cbe\u5ea6\uff09\u3002<\/p>\n\n\n\n
int a = 5;\ndouble b = a; \/\/ \u81ea\u52a8\u8f6c\u6362\u4e3a double<\/code><\/pre>\n\n\n\n
4.2 \u663e\u5f0f\u7c7b\u578b\u8f6c\u6362<\/strong><\/h3>\n\n\n\n
\u624b\u52a8\u8f6c\u6362\u7c7b\u578b\uff08\u9ad8\u7cbe\u5ea6 \u2192 \u4f4e\u7cbe\u5ea6\uff09\u3002<\/p>\n\n\n\n
double a = 5.75;\nint b = (int)a; \/\/ \u5f3a\u5236\u8f6c\u6362\u4e3a int<\/code><\/pre>\n\n\n\n
\n\n\n\n
5. \u603b\u7ed3<\/strong><\/h2>\n\n\n\n
    \n
  • \u57fa\u672c\u6570\u636e\u7c7b\u578b<\/strong>\uff1aint<\/code>, char<\/code>, float<\/code>, double<\/code>, bool<\/code>, void<\/code><\/li>\n\n\n\n
  • \u4fee\u9970\u7b26<\/strong>\uff1asigned<\/code>, unsigned<\/code>, short<\/code>, long<\/code><\/li>\n\n\n\n
  • \u590d\u5408\u6570\u636e\u7c7b\u578b<\/strong>\uff1a\u6570\u7ec4\u3001\u6307\u9488\u3001\u7ed3\u6784\u4f53\u3001\u679a\u4e3e<\/li>\n\n\n\n
  • \u7c7b\u578b\u8f6c\u6362<\/strong>\uff1a\u9690\u5f0f\u8f6c\u6362\uff08\u81ea\u52a8\uff09\u3001\u663e\u5f0f\u8f6c\u6362\uff08\u5f3a\u5236\uff09<\/li>\n<\/ul>\n\n\n\n
    \u5efa\u8bae<\/strong>\uff1a\u6839\u636e\u5b9e\u9645\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u6570\u636e\u7c7b\u578b\uff0c\u4ee5\u63d0\u9ad8\u7a0b\u5e8f\u6548\u7387\u548c\u53ef\u8bfb\u6027\uff01\u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
    C++ \u662f\u4e00\u79cd\u5f3a\u7c7b\u578b\u8bed\u8a00\uff0c\u53d8\u91cf\u5728\u4f7f\u7528\u524d\u5fc5\u987b\u58f0\u660e\u5176\u7c7b\u578b\u3002C++ \u63d0\u4f9b\u4e86\u591a\u79cd\u6570\u636e\u7c7b\u578b\uff0c\u5305\u62ec\u57fa\u672c\u6570\u636e\u7c7b\u578b\u3001\u7528\u6237\u81ea\u5b9a\u4e49 […]<\/p>\n","protected":false},"author":1,"featured_media":3236,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[81],"tags":[],"class_list":["post-3235","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-c-"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3235","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=3235"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3235\/revisions"}],"predecessor-version":[{"id":3237,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3235\/revisions\/3237"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media\/3236"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=3235"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=3235"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=3235"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}