{"id":401,"date":"2023-02-25T10:47:31","date_gmt":"2023-02-25T02:47:31","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=401"},"modified":"2023-04-29T21:37:40","modified_gmt":"2023-04-29T13:37:40","slug":"android-ndk-basic-c-basic-data-type-input-output-pointer","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/02\/25\/android-ndk-basic-c-basic-data-type-input-output-pointer\/","title":{"rendered":"Android NDK\u57fa\u78401\uff1aC_\u57fa\u672c\u6570\u636e\u7c7b\u578b_\u8f93\u5165\u8f93\u51fa_\u6307\u9488"},"content":{"rendered":"

Hello World<\/h2>\n
\/\/\u5f15\u5165\u5934\u6587\u4ef6\n\/\/\u53ea\u6709\u51fd\u6570\u7684\u58f0\u660e\uff0c\u7f16\u8bd1\u65f6\u4f1a\u53bb\u627e\u5230\u51fd\u6570\u7684\u5b9e\u73b0\n#include <stdio.h>\n\nvoid main() {\n    printf("hello world\\n");\n    \/\/system("mspaint");\n    system("pause");\n}<\/code><\/pre>\n
<\/p>\n
\u5e26\u53c2\u6570main\u51fd\u6570<\/p>\n
int main(int argc, char* argv) {\n    printf("hello world\\n");\n    return 0;\n}<\/code><\/pre>\n
\u57fa\u672c\u6570\u636e\u7c7b\u578b<\/h2>\n
\/\/\u57fa\u672c\u6570\u636e\u7c7b\u578b\uff1aint short long float double char\n\n\/*\nint %d\nshort %d\nlong %ld\nfloat %f\ndouble %lf\nchar %c\n%x \u5341\u516d\u8fdb\u5236\n%o \u516b\u8fdb\u5236\n%s \u5b57\u7b26\u4e32\n*\/\n\n#include <stdio.h>\n\nvoid main() {\n    int i = 1;\n    printf("%d\\n", i);\n\n    float f = 23.3;\n    printf("%f\\n", f);\n\n    \/\/\u57fa\u672c\u6570\u636e\u7c7b\u578b\u6240\u5360\u7684\u5b57\u8282\u6570\n    printf("int\u5360%d\u5b57\u8282\\n", sizeof(int));\n    printf("char\u5360%d\u5b57\u8282\\n", sizeof(char));\n    printf("float\u5360%d\u5b57\u8282\\n", sizeof(float));\n\n    \/\/\u5faa\u73af\n    int n = 0;\n    for (; n < 10; n++) {\n        printf("%d\\n", n);\n    }\n\n    \/\/\u53ea\u6709\u5728C99\u7248\u672c\u4e0b\u53ef\u884c\n    for (n = 0; n < 10; n++) {\n        printf("%d\\n", n);\n    }\n\n    \/\/\u7b49\u5f85\u8f93\u5165\n    system("pause");\n}<\/code><\/pre>\n
\u8f93\u5165\u8f93\u51fa<\/h2>\n
#define _CRT_SECURE_NO_WARNINGS \/\/\u5b8f\u5b9a\u4e49\n#include <stdio.h>\n\n\/\/\u8f93\u5165\u8f93\u51fa\u51fd\u6570\nvoid main() {\n    int i;\n    printf("\u8bf7\u8f93\u5165\u4e00\u4e2a\u6574\u6570\uff1a");\n    \/\/\u8d4b\u503c\n    scanf("%d", &i);  \/\/\u63a7\u5236\u53f0\u8f93\u5165\uff0c&\u53d6\u5730\u5740\u7b26\n    \/\/\u6253\u5370\n    printf("i\u7684\u503c\u4e3a\uff1a%d\\n", i);\n\n    system("pause");\n}<\/code><\/pre>\n
\u6307\u9488<\/h2>\n
#include <stdio.h>\n\n\/\/\u6307\u9488\u5b58\u50a8\u7684\u662f\u53d8\u91cf\u7684\u5185\u5b58\u5730\u5740\n\/\/\u5185\u5b58\u5730\u5740\uff0c\u7cfb\u7edf\u7ed9\u6570\u636e\u5206\u914d\u7684\u7f16\u53f7\uff08\u95e8\u724c\u53f7\uff09\n\/\/Visual Studio\u5185\u5b58\u5730\u5740\u7684\u503c\u67e5\u770b\uff1a\u83dc\u5355->\u8c03\u8bd5->\u7a97\u53e3->\u5185\u5b58->\u5185\u5b581->\u8f93\u5165\u5730\u5740\u503c\u548c\u6307\u5b9a\u67e5\u770b\u5217\u6570->\u5728\u6570\u636e\u533a\u53f3\u952e\u9009\u62e9\u663e\u793a\u683c\u5f0f\nvoid main() {\n    int i = 90;\n    \/\/\u6307\u9488\u53d8\u91cf\uff0c\u521b\u5efa\u4e00\u4e2aint\u7c7b\u578b\u7684\u6307\u9488\n    int* p = &i; \/\/p\u7684\u503c\u5c31\u662fi\u8fd9\u4e2a\u53d8\u91cf\u7684\u5185\u5b58\u5730\u5740\n    printf("%#x\\n", p);\n\n    float f = 89.5f;\n    \/\/\u521b\u5efa\u4e00\u4e2afloat\u7c7b\u578b\u7684\u6307\u9488\n    float *fp = &f;\n    \/\/%X\u662f\u4ee5\u5927\u5199\u5341\u516d\u8fdb\u5236\u6253\u5370\uff0c\u5e76\u4e14a~f\u6253\u5370\u51fa\u6765\u7684\u662f\u5927\u5199\u7684A\u3001B\u3001C\u3001D\u3001E\u3001F\n    \/\/\u5982\u679c\u662f%#X\uff0c\u5219\u4f1a\u5728\u6253\u5370\u7684\u5341\u516d\u8fdb\u5236\u7ed3\u679c\u524d\u9762\u52a0\u4e0a0X\n    printf("%#x\\n", fp);\n\n    system("pause");\n}<\/code><\/pre>\n
\/\/\u53d8\u91cf\u540d\uff0c\u5bf9\u5185\u5b58\u7a7a\u95f4\u4e0a\u7684\u4e00\u6bb5\u6570\u636e\u7684\u62bd\u8c61\nvoid main() {\n    int i = 100;\n    \/\/\u521b\u5efa\u4e00\u4e2aint\u7c7b\u578b\u7684\u6307\u9488\n    int *p = &i;\n    printf("i\u7684\u5730\u5740\uff1a%#x\\n", &i);\n    \/\/\u5bf9\u6307\u9488p\u5b58\u7684\u5730\u5740\u6307\u5411\u7684\u53d8\u91cf\u8fdb\u884c\u64cd\u4f5c\uff0c\u95f4\u63a5\u8d4b\u503c\uff0c\u76f8\u5f53\u4e8e i = 200;\n    *p = 200;\n    printf("i\u7684\u5730\u5740\uff1a%#x\\n", &i);\n    system("pause");\n}<\/code><\/pre>\n
\/\/\u6307\u9488\u7684\u6307\u9488\nvoid main() {\n    int i = 100;\n    \/\/\u521b\u5efa\u4e00\u4e2aint\u7c7b\u578b\u7684\u6307\u9488\n    int *p = &i;\n    \/\/\u8f93\u51fa\u5730\u5740\n    printf("i\u7684\u5730\u5740\uff1a%#x\\n", &i);\n    printf("p\u7684\u5730\u5740\uff1a%#x\\n", &p);  \/\/\u6bcf\u4e2a\u53d8\u91cf\u90fd\u6709\u5730\u5740\uff0c\u5f53\u7136\u5305\u62ec\u6307\u9488\u53d8\u91cf\n\n    system("pause");\n}<\/code><\/pre>\n
\/*\n\/\/\u5f62\u53c2\u503c\u6539\u53d8\uff0c\u5b9e\u53c2\u503c\u4e0d\u53d8\nvoid change(int i) {\n    i = 200;\n}\n*\/\n\n\/\/\u6307\u9488\u53c2\u6570\u4f20\u9012\nvoid change(int* p) {\n    *p = 200;\n}\n\n\/\/\u53d8\u91cf\u540d\uff0c\u5bf9\u5185\u5b58\u7a7a\u95f4\u4e0a\u7684\u4e00\u6bb5\u6570\u636e\u7684\u62bd\u8c61\nvoid main() {\n    int i = 100;\n    \/\/\u521b\u5efa\u4e00\u4e2aint\u7c7b\u578b\u7684\u6307\u9488\n    int *p = &i;\n\n    \/\/change(p);\n    change(&i);\n    printf("i\u7684\u503c\u4e3a\uff1a%d\\n",i);\n\n    system("pause");\n}<\/code><\/pre>\n
\u7efc\u5408\u6848\u4f8b<\/h2>\n
#include <stdio.h>\n#include <stdlib.h>\n#include <Windows.h>\n\nvoid main() {\n    int time = 600;\n    printf("time:%#x\\n", &time);\n    while (time > 0) {\n        time--;\n        printf("\u6e38\u620f\u65f6\u95f4\u5269\u4f59%d\u79d2\\n", time);\n        \/\/\u7761\u7720\n        Sleep(1000);\n    }\n    system("pause");\n}<\/code><\/pre>\n
\u5916\u6302\u7a0b\u5e8f\uff1a\u4f7f\u7528DLL\u6ce8\u5165\u5de5\u5177<\/p>\n
\u751f\u6210DLL\u52a8\u6001\u94fe\u63a5\u5e93\uff1a\u9879\u76ee\u5c5e\u6027->\u914d\u7f6e\u5c5e\u6027->\u5e38\u89c4->\u9879\u76ee\u9ed8\u8ba4\u503c->\u914d\u7f6e\u7c7b\u578b\uff1a\u52a8\u6001\u5e93(.dll)<\/p>\n
#include <stdlib.h>\n#include <stdio.h>\n\n__declspec(dllexport) void go() {\n    \/\/\u4fee\u6539time\u53d8\u91cf\u7684\u503c\n    int *p = 0x2ff9d8;\n    *p = 999999;\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
Hello World \/\/\u5f15\u5165\u5934\u6587\u4ef6 \/\/\u53ea\u6709\u51fd\u6570\u7684\u58f0\u660e\uff0c\u7f16\u8bd1\u65f6\u4f1a\u53bb\u627e\u5230\u51fd\u6570\u7684\u5b9e\u73b0 #include &lt […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-401","post","type-post","status-publish","format-standard","hentry","category-android-ndk"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/401","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=401"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/401\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=401"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=401"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=401"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}