{"id":94,"date":"2023-11-18T17:09:02","date_gmt":"2023-11-18T09:09:02","guid":{"rendered":"http:\/\/124.220.62.22\/?p=94"},"modified":"2023-11-18T17:09:02","modified_gmt":"2023-11-18T09:09:02","slug":"c%e8%af%ad%e8%a8%80%e4%b8%ad%e5%ad%97%e7%ac%a6%e4%b8%b2%e7%9a%84%e4%b8%a4%e7%a7%8d%e8%a1%a8%e8%be%be%e5%bd%a2%e5%bc%8f","status":"publish","type":"post","link":"http:\/\/blog.chxzking.cn\/index.php\/2023\/11\/18\/c%e8%af%ad%e8%a8%80%e4%b8%ad%e5%ad%97%e7%ac%a6%e4%b8%b2%e7%9a%84%e4%b8%a4%e7%a7%8d%e8%a1%a8%e8%be%be%e5%bd%a2%e5%bc%8f\/","title":{"rendered":"C\u8bed\u8a00\u4e2d\u5b57\u7b26\u4e32\u7684\u4e24\u79cd\u8868\u8fbe\u5f62\u5f0f-char*\u548cchar[]"},"content":{"rendered":"\n

\u524d\u8a00<\/h2>\n\n\n\n

\u5728C\u8bed\u8a00\u4e2d\uff0c\u8ffd\u6839\u5230\u5e95\u6709\u4e14\u4ec5\u6709\u4e24\u79cd\u65b9\u5f0f\u8868\u793a\u5b57\u7b26\u4e32\u2014\u2014char*<\/code>\u548cchar[]<\/code>\u3002\u4f46\u662f\u7531\u4e8e\u6307\u9488\u548c\u6570\u7ec4\u7684\u5173\u7cfb\uff0c\u8fd9\u4e24\u4e2a\u65b9\u6cd5\u7c7b\u4f3c\u4f46\u4e0d\u5b8c\u5168\u76f8\u540c\u3002<\/p>\n\n\n\n

char[]<\/h2>\n\n\n\n

\u6211\u4eec\u77e5\u9053\uff0cchar []<\/code>\u662f\u4e00\u4e2a\u5b57\u7b26\u6570\u7ec4\uff0c\u672c\u8d28\u4e0a\u662f\u5b58\u50a8\u4e86\u4e00\u4e2a\u5b57\u7b26\u4e32\u4e2d\u5355\u72ec\u7684\u4e00\u4e2a\u4e2a\u5b57\u7b26\u3002<\/p>\n\n\n\n

#include <stdio.h>\n\nint main(){\n    char a[3]=\"abc\";\n}<\/code><\/pre>\n\n\n\n
\u5728\u8fd9\u4e2a\u6570\u7ec4\u4e2d\uff0c\u6211\u4eec\u7684\u5b57\u7b26\u4e32\u672c\u8d28\u4e0a\u662f\u4f5c\u4e3a’a’ ‘b’ ‘c’\u7684\u65b9\u5f0f\u5b58\u50a8\u6570\u636e\u3002<\/p>\n\n\n\n
char*<\/h2>\n\n\n\n
char*<\/code>\u4f5c\u4e3a\u4e00\u4e2a\u5b57\u7b26\u6307\u9488\uff0c\u662f\u5982\u4f55\u8fdb\u884c\u5b57\u7b26\u4e32\u5b58\u50a8\u7684\u5462\uff0c\u5b83\u4e0e\u6570\u7ec4\u7c7b\u4f3c\uff0c\u5f00\u8f9f\u4e86\u4e00\u4e2a\u8fde\u7eed\u7684\u7a7a\u95f4\uff0c\u5e76\u5c06\u6570\u636e\u653e\u5728\u5176\u4e2d\uff0cchar *<\/code>\u4e2d\u5219\u653e\u5165\u8fd9\u4e2a\u5185\u5b58\u7a7a\u95f4\u7684\u9996\u5730\u5740<\/mark>\u3002<\/p>\n\n\n\n
#include <stdio.h>\n\nint main(){\n    char *a=\"abc\";\n}<\/code><\/pre>\n\n\n\n
\u5728\u8fd9\u4e2a\u4ee3\u7801\u4e2d\uff0c\u5176\u5b9e\u6709\u4e00\u4e2a\u975e\u5e38\u9700\u8981\u6ce8\u610f\u7684\u5730\u65b9\u2014\u2014char*\u4e2d\u5b58\u653e\u7684\u5176\u5b9e\u662f\u4e00\u4e2a\u5e38\u91cf\uff0c\u5b83\u7684\u503c\u662f\u4e0d\u5141\u8bb8\u88ab\u4fee\u6539\u7684\u3002<\/mark><\/p>\n\n\n\n
#include <stdio.h>\n\nint main(){\n    char *a=\"abc\";\n    *(a+1)='s';\n}<\/code><\/pre>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c<\/mark><\/p>\n\n\n\n
Segmentation fault<\/mark><\/p>\n\n\n\n
\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0c\u7f16\u8bd1\u5668\u7f16\u8bd1\u901a\u8fc7\uff0c\u4f46\u8fd0\u884c\u65f6\u629b\u51fa\u4e86\u4e00\u4e2a\u9519\u8bef\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u5728\u65e5\u5e38\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u7684\u65f6\u5019\u6700\u597d\u662f\u5728\u5b9a\u4e49\u524d\u589e\u52a0\u4e00\u4e2aconst<\/code>\uff0c\u907f\u514d\u7f16\u8bd1\u65f6\u65e0\u6cd5\u53d1\u73b0\u9519\u8bef\u3002<\/p>\n\n\n\n
\u4e8c\u8005\u533a\u522b<\/h2>\n\n\n\n
\u524d\u6587\u6211\u4eec\u63d0\u5230\uff0c\u4e8c\u8005\u672c\u8d28\u4e0achar[]<\/code>\u662f\u6570\u7ec4\uff0cchar*<\/code>\u662f\u6307\u9488;<\/p>\n\n\n\n
\u6240\u4ee5\u6211\u4eec\u5728\u5bf9\u5b57\u7b26\u8fdb\u884c\u8bbf\u95ee\u7684\u65f6\u5019\uff0cchar*<\/code>\u53ef\u4ee5\u4f7f\u7528++\u7684\u81ea\u589e\u8bbf\u95ee\uff0c\u6bd4\u5982\uff1a<\/p>\n\n\n\n
#include <stdio.h>\nint main(){\n    char *a = \"abc\";\n    printf(\"%c\",*(a));\n    printf(\"%c\",*(++a));\n    printf(\"\\n\");\n}<\/code><\/pre>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c<\/mark><\/p>\n\n\n\n
ab<\/mark><\/p>\n\n\n\n
\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0cchar*<\/code>\u8fdb\u884c\u4e86\u81ea\u589e\u8bbf\u95ee\uff0c\u5e76\u5f97\u5230\u4e86\u6b63\u786e\u7684\u7ed3\u679c\u3002<\/p>\n\n\n\n
\u4f46char[]\u65e0\u6cd5\u5982\u6b64\u64cd\u4f5c\uff0c\u6211\u4eec\u77e5\u9053\u6570\u7ec4\u540d\u662f\u4e00\u4e2a\u6307\u9488\u5e38\u91cf\uff0c\u4f60\u53ef\u4ee5\u6539\u53d8\u5b83\u6307\u5411\u7684\u5730\u5740\u7684\u503c\uff0c\u4f46\u4f60\u65e0\u6cd5\u66f4\u6539\u5b83\u6307\u5411\u7684\u5730\u5740<\/p>\n\n\n\n
#include <stdio.h>\nint main(){\n   char a[] =\"abc\";\n   printf(\"%c \",*(++a));\n\n    printf(\"\\n\");\n}<\/code><\/pre>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c<\/mark><\/p>\n\n\n\n
error: lvalue required as increment operand
 printf(“%c “,*(++a));<\/mark><\/p>\n\n\n\n
\u6211\u4eec\u80fd\u6e05\u6670\u770b\u5230\u7f16\u8bd1\u5668\u629b\u51fa\u4e86\u4e00\u4e2a\u9519\u8bef\u3002<\/p>\n\n\n\n
\u7b2c\u4e8c\u4e2a\u533a\u522b\uff0c\u662f\u8d4b\u503c\u533a\u522b\u3002<\/p>\n\n\n\n
\u6211\u4eec\u53ef\u4ee5\u7528char*<\/code>\u627f\u63a5char[]<\/code>\u7684\u5730\u5740<\/p>\n\n\n\n
#include <stdio.h>\nint main(){\n   char a[] =\"xyz\";\n   char *p;\n   p=a;\n    printf(\"%c \",*p);\n    printf(\"\\n\");\n}<\/code><\/pre>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c<\/mark><\/p>\n\n\n\n
x<\/mark><\/mark><\/p>\n\n\n\n
\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u8fd9\u91cc\u7684\u6210\u529f\u5f97\u5230\u4e86a\u7684\u503c\uff0c\u4f46\u662f\u5982\u679c\u6211\u4eec\u6362\u4e00\u4e0b\uff1a<\/p>\n\n\n\n
#include <stdio.h>\n\n\nint main(){\n    char a[3] ;\n    char *p =\"xyz\";\n    a=p;\n    printf(\"%c \",*a);\n    printf(\"\\n\");\n}<\/code><\/pre>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c<\/mark><\/p>\n\n\n\n
error: assignment to expression with array type
a=p;<\/mark>
<\/p>\n\n\n\n
\u7f16\u8bd1\u5668\u629b\u51fa\u4e86\u4e00\u4e2a\u9519\u8bef\uff0c\u6240\u4ee5\u6211\u4eec\u5f97\u51fa\u6765\u4e00\u4e2a\u7ed3\u8bba\uff0cchar*\u53ef\u4ee5\u627f\u63a5char[]\u7684\u503c\uff0c\u4f46\u662fchar[]\u4e0d\u80fd\u627f\u63a5char*\u7684\u503c\uff0c\u5f52\u6839\u5230\u5e95\uff0c\u8fd8\u662fchar*\u662f\u4e00\u4e2a\u6307\u9488\u53d8\u91cf\uff0c\u4f46char[]\u7684\u6570\u7ec4\u540d\u662f\u4e00\u4e2a\u6307\u9488\u5e38\u91cf\uff0c\u5c31\u6837\u80fd\u5f88\u597d\u7406\u89e3\u4e3a\u4f55\u4f1a\u9020\u6210\u5730\u5740\u4f20\u9012\u51fa\u9519\u4e86\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u524d\u8a00 \u5728C\u8bed\u8a00\u4e2d\uff0c\u8ffd\u6839\u5230\u5e95\u6709\u4e14\u4ec5\u6709\u4e24\u79cd\u65b9\u5f0f\u8868\u793a\u5b57\u7b26\u4e32\u2014\u2014char*\u548cchar[]\u3002\u4f46\u662f\u7531\u4e8e\u6307\u9488\u548c\u6570\u7ec4\u7684\u5173\u7cfb\uff0c\u8fd9 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[18,22,24],"class_list":["post-94","post","type-post","status-publish","format-standard","hentry","category-c-c","tag-c","tag-pointer","tag-array"],"_links":{"self":[{"href":"http:\/\/blog.chxzking.cn\/index.php\/wp-json\/wp\/v2\/posts\/94","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/blog.chxzking.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blog.chxzking.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blog.chxzking.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/blog.chxzking.cn\/index.php\/wp-json\/wp\/v2\/comments?post=94"}],"version-history":[{"count":0,"href":"http:\/\/blog.chxzking.cn\/index.php\/wp-json\/wp\/v2\/posts\/94\/revisions"}],"wp:attachment":[{"href":"http:\/\/blog.chxzking.cn\/index.php\/wp-json\/wp\/v2\/media?parent=94"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.chxzking.cn\/index.php\/wp-json\/wp\/v2\/categories?post=94"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.chxzking.cn\/index.php\/wp-json\/wp\/v2\/tags?post=94"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}