{"id":39,"date":"2026-08-05T20:30:03","date_gmt":"2026-08-05T12:30:03","guid":{"rendered":"http:\/\/38.60.212.63:8080\/?p=39"},"modified":"2026-08-19T20:34:17","modified_gmt":"2026-08-19T12:34:17","slug":"03-c%e8%af%ad%e8%a8%80%e5%8f%98%e9%87%8f%e5%92%8c%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/decagrammaton.xyz\/?p=39","title":{"rendered":"03-C\u8bed\u8a00\u53d8\u91cf\u548c\u6570\u636e\u7c7b\u578b"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">signed\u548cunsigned<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u822c\u6765\u8bf4\uff0c\u5bf9\u4e8eint\u7c7b\u578b\uff0c\u4e0d\u505a\u58f0\u660e\u4e0b\uff0c\u9ed8\u8ba4\u662fsigned\nint,\u7531\u4e8e\u662f\u9ed8\u8ba4\u60c5\u51b5\uff0c\u6240\u4ee5signed\u4e0d\u5199<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">signed \u548c unsigned\u7684\u533a\u522b<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>signed:\u4e00\u4e2a\u7c7b\u578b\u5e26\u6709\u6b63\u8d1f\u53f7\uff0c\u4e14\u5305\u542b\u8d1f\u503c<\/li>\n\n\n\n<li>unsigned:\u8be5\u7c7b\u578b\u4e0d\u5305\u62ec\u6b63\u8d1f\u53f7\uff0c\u53ea\u80fd\u8868\u793a0\u548c\u6b63\u6574\u6570<\/li>\n<\/ul>\n\n\n\n<section id=\"\u6574\u6570\u53d8\u91cf\u58f0\u660e\u4e3aunsigned\u7684\u597d\u5904\u662f\u540c\u6837\u957f\u5ea6\u7684\u5185\u5b58\u53ef\u4ee5\u8868\u793a\u7684\u6700\u5927\u6574\u6570\u503c\u5927\u4e86\u4e00\u500d\" class=\"tip\">\n<h2>\u6574\u6570\u53d8\u91cf\u58f0\u660e\u4e3aunsigned\u7684\u597d\u5904\u662f:\u540c\u6837\u957f\u5ea6\u7684\u5185\u5b58\u53ef\u4ee5\u8868\u793a\u7684\u6700\u5927\u6574\u6570\u503c\u5927\u4e86\u4e00\u500d<\/h2>\n<h4 id=\"\u4f7f\u7528\u4f8b\">\u4f7f\u7528\u4f8b\uff1a<\/h4>\n<p>\u57288\u4f4d\u4e0b\u7684 unsigned char\u7684\u53d6\u503c\u8303\u56f4\u662f:0 ~ 255 (MAX=255)<\/p>\n<p>signed char\u7684\u53d6\u503c\u8303\u56f4\u662f:-128 ~ 127 (MAX=127)<\/p>\n<\/section>\n\n\n\n<h2 class=\"wp-block-heading\">\u8bc1\u660e<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728x64\u4e0b\u7684char\u7c7b\u578b\u4e3a\u4f8b:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">char = 1\u5b57\u8282 = 8bit<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5341\u8fdb\u5236:123 = 1<em>10<sup>2+2*10<\/sup>1+3<\/em>10^0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e8c\u8fdb\u5236:0101 = 0 \u00d7 2\u00b3 + 1 \u00d7 2\u00b2 + 0 \u00d7 2\u00b9 + 1 \u00d7 2\u2070 = 5 <img decoding=\"async\" src=\"\/blog\/vitepress-theme-bluearchive-main\/picture\/C\/03\/signedcharerjzhi.png\" alt=\"signedcharerjzhi\"><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"278\" src=\"http:\/\/38.60.212.63:8080\/wp-content\/uploads\/2026\/08\/1787142520-signedcharerjzhi-1024x278.png\" alt=\"\" class=\"wp-image-41\" srcset=\"https:\/\/decagrammaton.xyz\/wp-content\/uploads\/2026\/08\/1787142520-signedcharerjzhi-1024x278.png 1024w, https:\/\/decagrammaton.xyz\/wp-content\/uploads\/2026\/08\/1787142520-signedcharerjzhi-300x82.png 300w, https:\/\/decagrammaton.xyz\/wp-content\/uploads\/2026\/08\/1787142520-signedcharerjzhi-768x209.png 768w, https:\/\/decagrammaton.xyz\/wp-content\/uploads\/2026\/08\/1787142520-signedcharerjzhi.png 1534w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728 signed char \u4e2d<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"278\" src=\"http:\/\/38.60.212.63:8080\/wp-content\/uploads\/2026\/08\/1787142527-SINGNEDCHAR-1024x278.png\" alt=\"\" class=\"wp-image-42\" srcset=\"https:\/\/decagrammaton.xyz\/wp-content\/uploads\/2026\/08\/1787142527-SINGNEDCHAR-1024x278.png 1024w, https:\/\/decagrammaton.xyz\/wp-content\/uploads\/2026\/08\/1787142527-SINGNEDCHAR-300x82.png 300w, https:\/\/decagrammaton.xyz\/wp-content\/uploads\/2026\/08\/1787142527-SINGNEDCHAR-768x209.png 768w, https:\/\/decagrammaton.xyz\/wp-content\/uploads\/2026\/08\/1787142527-SINGNEDCHAR.png 1534w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"> <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b26\u53f7\u4f4d\uff1a\u7528\u6765\u5224\u5b9a\u6b63\u8d1f\u503c \u5176\u4e2d\u7b26\u53f7\u4f4d\u4e3a0\u65f6\u662f\u6b63\u6570\uff0c\u7b26\u53f7\u4f4d\u4e3a\u662f\u8d1f\u6570<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6240\u4ee5\uff0c\u5728signed char\u4e2d \u6700\u5927\u503c\u662f 0 1 1 1 1 1 1 1 = = 64+32+16+8+4+2+1 =\n127<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728 unsigned char \u4e2d <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"278\" src=\"http:\/\/38.60.212.63:8080\/wp-content\/uploads\/2026\/08\/1787142541-UNSIGNEDCHAR-1024x278.png\" alt=\"\" class=\"wp-image-43\" srcset=\"https:\/\/decagrammaton.xyz\/wp-content\/uploads\/2026\/08\/1787142541-UNSIGNEDCHAR-1024x278.png 1024w, https:\/\/decagrammaton.xyz\/wp-content\/uploads\/2026\/08\/1787142541-UNSIGNEDCHAR-300x82.png 300w, https:\/\/decagrammaton.xyz\/wp-content\/uploads\/2026\/08\/1787142541-UNSIGNEDCHAR-768x209.png 768w, https:\/\/decagrammaton.xyz\/wp-content\/uploads\/2026\/08\/1787142541-UNSIGNEDCHAR.png 1534w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u6240\u4ee5\uff0c\u5728unsigned char\u4e2d \u6700\u5927\u503c\u662f 1 1 1 1 1 1 1 1 = =\n128+64+32+16+8+4+2+1 = 255 \u6240\u4ee5\uff0c\u5728unsigned char\u4e2d \u6700\u5c0f\u503c\u662f 0 0 0 0 0 0\n0 0 = 0<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u5728 signed char\n\u4e2d\u8be5\u5982\u4f55\u5b58\u50a8\u8d1f\u6570\u5462<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u8ba1\u7b97\u673a\u79d1\u5b66\u4e2d\uff0c\u539f\u7801\u3001\u53cd\u7801\u548c\u8865\u7801\u662f\u6570\u5b57\u8868\u793a\u65b9\u6cd5\uff0c\u5b83\u4eec\u7528\u4e8e\u7b80\u5316\u8ba1\u7b97\u673a\u4e2d\u6570\u5b57\u7684\u7b97\u672f\u8fd0\u7b97\uff0c\u5c24\u5176\u662f\u4e8c\u8fdb\u5236\u6570\u7684\u52a0\u51cf\u8fd0\u7b97<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u539f\u7801\uff08Sign-Magnitude\uff09 \u6982\u5ff5\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u539f\u7801\u662f\u4e00\u79cd\u6700\u7b80\u5355\u7684\u8868\u793a\u6709\u7b26\u53f7\u6570\u7684\u65b9\u6cd5\u3002\n\u4f7f\u7528\u6700\u9ad8\u4f4d\uff08\u6700\u5de6\u8fb9\u7684\u4e00\u4f4d\uff09\u8868\u793a\u7b26\u53f7\uff1a0\u8868\u793a\u6b63\u6570\uff0c1\u8868\u793a\u8d1f\u6570\u3002\n\u5176\u4f59\u4f4d\u8868\u793a\u6570\u503c\u7684\u5927\u5c0f\u3002 \u89c4\u5219\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e\u6b63\u6570\uff1a\u539f\u7801\u7684\u8868\u793a\u4e0e\u5176\u4e8c\u8fdb\u5236\u503c\u76f8\u540c\u3002\n\u5bf9\u4e8e\u8d1f\u6570\uff1a\u5c06\u5176\u7edd\u5bf9\u503c\u7684\u4e8c\u8fdb\u5236\u8868\u793a\u53d6\u539f\u7801\uff0c\u5e76\u5c06\u6700\u9ad8\u4f4d\u8bbe\u7f6e\u4e3a1\uff08\u8868\u793a\u8d1f\u6570\uff09\u3002\n\u793a\u4f8b\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">8\u4f4d\u539f\u7801\u8868\u793a\uff1a +5\uff1a00000101 <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">-5\uff1a10000101 \u53cd\u7801\uff08Ones\u2019 Complement\uff09 \u6982\u5ff5\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53cd\u7801\u662f\u901a\u8fc7\u5bf9\u539f\u7801\u7684\u6570\u503c\u90e8\u5206\u9010\u4f4d\u53d6\u53cd\uff080\u53d81\uff0c1\u53d80\uff09\u5f97\u5230\u7684\u3002\n\u6b63\u6570\u7684\u53cd\u7801\u548c\u539f\u7801\u76f8\u540c\u3002 \u8d1f\u6570\u7684\u53cd\u7801\u662f\u5176\u539f\u7801\u9664\u7b26\u53f7\u4f4d\u5916\u6240\u6709\u4f4d\u53d6\u53cd\u3002\n\u89c4\u5219:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e\u6b63\u6570\uff0c\u53cd\u7801\u4e0e\u539f\u7801\u76f8\u540c\u3002\n\u5bf9\u4e8e\u8d1f\u6570\uff0c\u53cd\u7801\u662f\u5c06\u539f\u7801\u4e2d\u6240\u6709\u4f4d\uff08\u9664\u4e86\u7b26\u53f7\u4f4d\uff09\u53d6\u53cd\uff0c\u5373\u5c06\u6bcf\u4e2a\u4e8c\u8fdb\u5236\u4f4d\u4ece 0\n\u6539\u4e3a 1\uff0c\u6216\u8005\u4ece 1 \u6539\u4e3a 0\u3002 \u793a\u4f8b\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">8\u4f4d\u53cd\u7801\u8868\u793a\uff1a +5\uff1a00000101 <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">-5\uff1a11111010 \u8865\u7801\uff08Two\u2019s Complement\uff09 \u6982\u5ff5\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8865\u7801\u662f\u53cd\u7801\u52a01\u5f97\u5230\u7684\u3002 \u6b63\u6570\u7684\u8865\u7801\u548c\u539f\u7801\u76f8\u540c\u3002 \u8d1f\u6570\u7684\u8865\u7801\u662f\u5176\u53cd\u7801\u52a01\u3002\n\u89c4\u5219:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e\u6b63\u6570\uff0c\u8865\u7801\u4e0e\u539f\u7801\u76f8\u540c\u3002 \u5bf9\u4e8e\u8d1f\u6570\uff0c\u8865\u7801\u662f\u5c06\u53cd\u7801\u52a0 1\u3002 \u793a\u4f8b\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">8\u4f4d\u8865\u7801\u8868\u793a\uff1a +5\uff1a00000101 <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">-5\uff1a11111011\uff08\u53cd\u7801\u4e3a11111010\uff0c\u52a01\u5f97\u523011111011\uff09<\/p>\n\n\n\n<div class=\"tip\">\n<p>\u8ba1\u7b97\u673a\u5b58\u50a8\u8d1f\u6570\u65f6\u5b58\u50a8\u7684\u662f\u8865\u7801<\/p>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48\u8ba1\u7b97\u673a\u4e0d\u7528\u539f\u7801\u8868\u793a\u8d1f\u6570\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u4e2a\u975e\u5e38\u7b80\u5355\u7684\u4f8b\u5b50\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">5 + (-5)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u4f7f\u7528\u539f\u7801\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">00000101 <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">10000101<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u76f4\u63a5\u76f8\u52a0\u5e76\u4e0d\u80fd\u5f97\u5230\u7406\u60f3\u7ed3\u679c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6240\u4ee5\u624d\u9700\u8981\u4e00\u79cd\u66f4\u9002\u5408\u8ba1\u7b97\u673a\u8fdb\u884c\u52a0\u51cf\u6cd5\u7684\u8868\u793a\u65b9\u5f0f\u2014\u2014\u8865\u7801\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u5bf9\u4e8e\u521d\u5b66\u8005\uff0c-1 \u662f\u6700\u76f4\u89c2\u7684\u4f8b\u5b50\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">+1 00000001<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">-1 11111111<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7136\u540e\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">00000001 + 11111111 \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 100000000<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">8 bit \u53ea\u80fd\u4fdd\u7559\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">00000000<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e5f\u5c31\u662f\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 + (-1) = 0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>signed\u548cunsigned \u4e00\u822c\u6765\u8bf4\uff0c\u5bf9\u4e8eint\u7c7b\u578b\uff0c\u4e0d\u505a\u58f0\u660e\u4e0b\uff0c\u9ed8\u8ba4\u662fsigned int,\u7531\u4e8e\u662f\u9ed8\u8ba4\u60c5\u51b5\uff0c\u6240\u4ee5signed &#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-39","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/decagrammaton.xyz\/index.php?rest_route=\/wp\/v2\/posts\/39","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/decagrammaton.xyz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/decagrammaton.xyz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/decagrammaton.xyz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/decagrammaton.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=39"}],"version-history":[{"count":2,"href":"https:\/\/decagrammaton.xyz\/index.php?rest_route=\/wp\/v2\/posts\/39\/revisions"}],"predecessor-version":[{"id":44,"href":"https:\/\/decagrammaton.xyz\/index.php?rest_route=\/wp\/v2\/posts\/39\/revisions\/44"}],"wp:attachment":[{"href":"https:\/\/decagrammaton.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=39"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/decagrammaton.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=39"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/decagrammaton.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=39"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}