{"id":11278,"date":"2022-09-26T19:08:53","date_gmt":"2022-09-26T13:38:53","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-usage-of-uint_8-uint_16-and-uint_32\/"},"modified":"2022-09-26T19:08:53","modified_gmt":"2022-09-26T13:38:53","slug":"solved-usage-of-uint_8-uint_16-and-uint_32","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-usage-of-uint_8-uint_16-and-uint_32\/","title":{"rendered":"[Solved] Usage of uint_8, uint_16 and uint_32"},"content":{"rendered":"

[ad_1]
\n<\/p>\n

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<\/div>\n
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In your 3 cases, before the printf statement, the 4 first bytes of the arr<\/code> array (in hexadecimal format) are: FF D8 FF E0, which corresponds to 255 216 255 224.<\/p>\n

Here are explanations of each case: <\/p>\n

    \n
  1. \n

    arr[0]<\/code> has uint8_t type, so its 1-byte value is 0xFF, so printf(\"%i\", arr[0]);<\/code> prints 255, which corresponds to 0xFF in signed decimal integer format required by %i<\/code>, integer size being 4 bytes.<\/p>\n<\/li>\n

  2. \n

    arr[0]<\/code> has uint16_t type, so its 2-bytes value is 0xFFD8, so printf(\"%i\", arr[0]);<\/code> prints 55551, which corresponds to 0xFFD8 in signed decimal integer format required by %i<\/code>, integer size being 4 bytes. Note that 0xFFD8 is interpreted with little-endianness (the byte 0xD8 is the MSB).<\/p>\n<\/li>\n

  3. \n

    arr[0]<\/code> has uint32_t type, so its 4-bytes value is 0xFFD8FFE0, so printf(\"%i\", arr[0]);<\/code> prints -520103681, which corresponds to 0xFFD8FFE0 in signed<\/strong> decimal integer format required by %i<\/code>, integer size being 4 bytes. Note that 0xFFD8FFE0 is interpreted with little-endianness (the byte 0xE0 is the MSB).<\/p>\n<\/li>\n<\/ol>\n

    Note: I voluntarily changed “255 216 255 244” from your post into “255 216 255 224”. I think you made a typo.<\/em><\/p>\n<\/p><\/div>\n

    <\/div>\n<\/div>\n

    <\/span> <\/p><\/div>\n<\/div>\n

    [ad_2]<\/p>\n

    solved Usage of uint_8, uint_16 and uint_32 <\/p>\n","protected":false},"excerpt":{"rendered":"

    [ad_1] In your 3 cases, before the printf statement, the 4 first bytes of the arr array (in hexadecimal format) are: FF D8 FF E0, which corresponds to 255 216 255 224. Here are explanations of each case: arr[0] has uint8_t type, so its 1-byte value is 0xFF, so printf(“%i”, arr[0]); prints 255, which corresponds … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[324,816,3087,1511],"class_list":["post-11278","post","type-post","status-publish","format-standard","hentry","category-solved","tag-c","tag-cs50","tag-fread","tag-typedef"],"yoast_head":"\n[Solved] Usage of uint_8, uint_16 and uint_32 - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-usage-of-uint_8-uint_16-and-uint_32\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Usage of uint_8, uint_16 and uint_32 - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] In your 3 cases, before the printf statement, the 4 first bytes of the arr array (in hexadecimal format) are: FF D8 FF E0, which corresponds to 255 216 255 224. Here are explanations of each case: arr[0] has uint8_t type, so its 1-byte value is 0xFF, so printf("%i", arr[0]); prints 255, which corresponds ... 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