{"id":441,"date":"2024-09-06T11:16:25","date_gmt":"2024-09-06T03:16:25","guid":{"rendered":"https:\/\/www.yanwenkai.com\/?p=441"},"modified":"2024-09-11T15:36:41","modified_gmt":"2024-09-11T07:36:41","slug":"c%e5%9f%ba%e7%a1%80%e7%ac%94%e8%ae%b0","status":"publish","type":"post","link":"https:\/\/www.yanwenkai.com\/?p=441","title":{"rendered":"C\u57fa\u7840\u7b14\u8bb0"},"content":{"rendered":"

1 \u524d\u8a00<\/h1>\n

  \u6ca1\u5565\u91cd\u8981\u7684\u4e1c\u897f\uff0c\u90fd\u662fC\u8bed\u8a00\u7684\u57fa\u7840\u77e5\u8bc6\uff1b\u5728\u5b66\u4e60\u65f6\u9047\u5230\u7684\u95ee\u9898\uff0c\u6574\u7406\u603b\u7ed3\u5206\u4eab\u4e00\u4e0b\uff01<\/p>\n

2 \u7f16\u8bd1\u6b65\u9aa4\u7684\u5206\u6790<\/h1>\n

  \u7f16\u8bd1\u5206\u4e3a\u56db\u4e2a\u6b65\u9aa4\uff1a\u9884\u5904\u7406–>\u7f16\u8bd1–>\u6c47\u7f16–>\u94fe\u63a5\uff0c\u6bcf\u4e2a\u6b65\u9aa4\u6267\u884c\u4e0d\u540c\u5f97\u529f\u80fd\u4efb\u52a1\uff0c\u751f\u6210\u4e0d\u540c\u5f97\u4e2d\u95f4\u6587\u4ef6\u3002\u8be6\u7ec6\u60c5\u51b5\u5982\u4e0b\uff1a
\n1.\u9884\u5904\u7406\uff1a\u6ce8\u91ca\u7684\u5220\u9664\uff0c\u5934\u6587\u4ef6\u7684\u5c55\u5f00\uff0c\u5b8f\u5b9a\u4e49\u7684\u66ff\u6362<\/p>\n

gcc -E xxx.c -o xxx.i(\u751f\u6210.l\u6587\u4ef6)<\/code><\/pre>\n
2.\u7f16\u8bd1\uff1a\u8bed\u6cd5\u5206\u6790\uff0c\u8bcd\u6cd5\u5206\u6790\uff0c\u67e5\u9519\uff0c\u82e5\u65e0\u95ee\u9898\u751f\u6210\u5bf9\u5e94\u7684.s\u6c47\u7f16\u6587\u4ef6<\/p>\n
gcc -S xxx.i -o xxx.s(\u751f\u6210.s\u6587\u4ef6)<\/code><\/pre>\n
3.\u6c47\u7f16\uff1a\u5c06\u6c47\u7f16\u6587\u4ef6\u7ffb\u8bd1\u6210\u4e8c\u8fdb\u5236\u6587\u4ef6<\/p>\n
gcc -c xxx.s -o xxx.o(\u751f\u6210.o\u6587\u4ef6)i<\/code><\/pre>\n
4.\u94fe\u63a5\uff1a\u94fe\u63a5\u5bf9\u5e94\u7684\u5e93\u6587\u4ef6i<\/p>\n
gcc xxx.o -o a.out\uff08\u751f\u6210\u53ef\u6267\u884c\u6587\u4ef6\uff09<\/code><\/pre>\n
3 \u4e8c\u8fdb\u5236\u539f\u53cd\u8865\u7684\u8ba1\u7b97<\/h1>\n
  \u6570\u636e\u5728\u50a8\u5b58\u65f6\u4f1a\u9047\u5230\u539f\u3001\u53cd\u3001\u8865\u7801\u95ee\u9898\u3002\u5176\u4e2d\u5b58\u50a8\u65f6\u5f97\u6570\u636e\u5206\u4e3a\u65e0\u7b26\u53f7\u548c\u6709\u7b26\u53f7\u4e24\u79cd\u7c7b\u578b\uff0c\u5176\u4e2d\u6709\u7b26\u53f7\u7684\u8d1f\u6570\u624d\u4f1a\u6d89\u53ca\u5230\u539f\u3001\u53cd\u3001\u8865\u7684\u95ee\u9898\u3002\u5177\u4f53\u60c5\u51b5\u5982\u4e0b\uff1a
\n1.\u65e0\u7b26\u53f7\u6570\uff1a<\/p>\n
    \u4e0d\u6d89\u53ca\u8d1f\u503c\uff0c\u539f\u7801\u3001\u53cd\u7801\u3001\u8865\u7801\u90fd\u4e00\u6837<\/code><\/pre>\n
2.\u6709\u7b26\u53f7\u6b63\u6570\uff1a<\/p>\n
    \u539f\u7801\u3001\u53cd\u7801\u3001\u8865\u7801\u90fd\u4e00\u6837<\/code><\/pre>\n
3.\u6709\u7b26\u53f7\u8d1f\u6570\uff1a<\/p>\n
    \u53cd\u7801=\u539f\u7801\u4e2d\u7b26\u53f7\u4f4d\u4e0d\u53d8\uff0c\u6570\u636e\u4f4d\u6309\u4f4d\u53d6\u53cd\uff080\u53d81\uff0c1\u53d80\uff09\n    \u8865\u7801=\u53cd\u7801+1<\/code><\/pre>\n
  \u6570\u636e\u5728\u5b58\u50a8\u548c\u8bfb\u53d6\u65f6\u9075\u5faa\u4e0d\u540c\u7684\u89c4\u5219\uff0c\u56e0\u6b64\u8981\u6ce8\u610f\u5bf9\u6570\u636e\u7684\u5904\u7406\uff0c\u5177\u4f53\u7684\u89c4\u5219\u662f\uff1a\u50a8\u5b58\u662f\u770b\u6b63\u8d1f\uff0c\u53d6\u51fa\u65f6\u770b\u7c7b\u578b\uff08\u50a8\u5b58\u6570\u636e\u65f6\u770b\u7ed9\u7684\u6570\u636e\u662f\u6b63\u8d1f\u6570\uff0c\u53d6\u51fa\u65f6\u770b\u770b\u5b9a\u4e49\u7684\u662fsigned\u8fd8\u662funsigned,\uff09\u5982signed=129,\u5b58\u8fdb\u53bb\u662f129\uff0c\u53d6\u51fa\u65f6\u6309129\u505a\u8865\u7801\u3001\u53cd\u7801\u3001\u539f\u7801\u987a\u5e8f\u64cd\u4f5c\uff0c\u6700\u9ad8\u4f4d1\u7684\u5b9e\u6570\u53d8\u4e3a\u7b26\u53f7\u4f4d\uff0c\u6700\u7ec8\u8f93\u51fa-127\u3002
\n  \u5982\u4e0b\u662f\u9488\u5bf9\u5404\u79cd\u6570\u636e\u7c7b\u578b\u5728\u5b9e\u9645\u8ba1\u7b97\u673a\u5b58\u50a8\u53d6\u51fa\u65f6\u7684\u89c4\u5219\u793a\u4f8b\uff1a<\/p>\n
#include \n\nint main(int argc, const char *argv[])\n{\n    unsigned char a = 10;\n    \/\/\u5b58\u50a8\u65f6\n    \/\/\u539f\u7801: 0000 1010\n    \/\/\u53cd\u7801: 0000 1010\n    \/\/\u8865\u7801: 0000 1010\n    \/\/\u53d6\u51fa\u65f6\n    \/\/\u8865\u7801: 0000 1010\n    \/\/\u53cd\u7801: 0000 1010\n    \/\/\u539f\u7801: 0000 1010  -->10\n    printf(\"a = %d\\n\", a);\/\/10\n\n    signed char b = -10;\n    \/\/\u5b58\u50a8\u65f6\n    \/\/\u539f\u7801: 1000 1010\n    \/\/\u53cd\u7801: 1111 0101\n    \/\/\u8865\u7801: 1111 0110\n    \/\/\u53d6\u51fa\u65f6\n    \/\/\u8865\u7801: 1111 0110\n    \/\/\u53cd\u7801: 1111 0101\n    \/\/\u539f\u7801: 1000 1010  -->-10\n    printf(\"b = %d\\n\", b);\/\/-10\n\n    signed char c = 129;\n    \/\/\u5b58\u50a8\u65f6\n    \/\/\u539f\u7801: 1000 0001\n    \/\/\u53cd\u7801: 1000 0001\n    \/\/\u8865\u7801: 1000 0001\n    \/\/\u53d6\u51fa\u65f6\n    \/\/\u8865\u7801: 1000 0001\n    \/\/\u53cd\u7801: 1000 0000\n    \/\/\u539f\u7801: 1111 1111  --> -127\n    printf(\"c = %d\\n\", c);\/\/-127\n\n    unsigned char d = -1;\n    \/\/\u5b58\u50a8\u65f6\n    \/\/\u539f\u7801: 1000 0001\n    \/\/\u53cd\u7801: 1111 1110\n    \/\/\u8865\u7801: 1111 1111\n    \/\/\u53d6\u51fa\u65f6\n    \/\/\u8865\u7801: 1111 1111\n    \/\/\u53cd\u7801: 1111 1111\n    \/\/\u539f\u7801: 1111 1111  -->255\n    printf(\"d = %d\\n\", d); \/\/255\n\n    return 0;<\/code><\/pre>\n
  \u5176\u4e2d\u5728\u539f\u3001\u53cd\u3001\u8865\u65f6\u4f1a\u6d89\u53ca\u5230\u8fdb\u4f4d\uff0c\u8fd9\u91cc\u4ee5-4\u4e3a\u4f8b\uff0c\u505a\u8fdb\u4e00\u6b65\u8865\u5145\uff1a<\/p>\n
\u50a8\u5b58\uff1a\n\u539f\u7801\uff1a1000 0100\n\u53cd\u7801\uff1a1111 1011\uff08\u539f\u53d8\u53cd\uff0c\u5355\u4f4d\u4e0d\u53d8\uff0c\u6570\u636e\u4f4d\u6309\u4f4d\u53d6\u53cd\uff09\n\u8865\u7801\uff1a1111 1100\uff08\u53cd\u53d8\u8865\uff0c\u6700\u540e\u4e00\u4f4d\u52a0\u4e00\uff0c1+1\u53d82\u8fdb\u4e00\u4f4d\uff0c\u539f\u4f4d\u53d80\uff0c\u50122\u4f4d\u52a01\u7b49\u4e8e2\u8fdb\u4e00\uff0c\u539f\u4f4d\u53d80\uff0c\u8fdb\u5230\u5012\u7b2c\u4e09\u4f4d\uff09\n\u53d6\u51fa\uff1a\n\u8865\u7801\uff1a1111 1100\n\u53cd\u7801\uff1a1111 1011\uff08\u8865\u53d8\u53cd\uff0c\u6700\u540e\u4e00\u4f4d\u51cf\u4e00\uff0c\u4e0d\u591f\u5411\u524d\u501f\uff0c\u501f\u5230\u5230\u7b2c\u4e09\u4f4d\uff0c\u7b2c\u4e09\u4f4d\u53d80\uff0c\u5230\u7b2c\u4e8c\u4f4d\u53d82\u518d\u501f\u52691\uff0c\u6700\u540e\u4e00\u4f4d\u53d82\u51cf1\u7b49\u4e8e1\uff0c\uff09\n\u539f\u7801\uff1a1000 0100\uff08\u6309\u4f4d\u53d6\u53cd\uff09<\/code><\/pre>\n
\u603b\u7ed3<\/h1>\n
  \u6709\u7a7a\u5c31\u66f4\u65b0\uff0c\u656c\u8bf7\u671f\u5f85\uff01\uff01\uff01\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
1 \u524d\u8a00   \u6ca1\u5565\u91cd\u8981\u7684\u4e1c\u897f\uff0c\u90fd\u662fC\u8bed\u8a00\u7684\u57fa\u7840\u77e5\u8bc6\uff1b\u5728\u5b66\u4e60\u65f6\u9047\u5230\u7684\u95ee\u9898\uff0c\u6574\u7406\u603b\u7ed3\u5206\u4eab\u4e00\u4e0b\uff01 […]<\/p>\n","protected":false},"author":1,"featured_media":450,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[34,35],"class_list":["post-441","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-3","tag-c-c","tag-35"],"_links":{"self":[{"href":"https:\/\/www.yanwenkai.com\/index.php?rest_route=\/wp\/v2\/posts\/441","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yanwenkai.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.yanwenkai.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.yanwenkai.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yanwenkai.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=441"}],"version-history":[{"count":4,"href":"https:\/\/www.yanwenkai.com\/index.php?rest_route=\/wp\/v2\/posts\/441\/revisions"}],"predecessor-version":[{"id":448,"href":"https:\/\/www.yanwenkai.com\/index.php?rest_route=\/wp\/v2\/posts\/441\/revisions\/448"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.yanwenkai.com\/index.php?rest_route=\/wp\/v2\/media\/450"}],"wp:attachment":[{"href":"https:\/\/www.yanwenkai.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=441"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yanwenkai.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=441"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yanwenkai.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=441"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}