Ăn bánh Donut với C/C++

{"success":true,"head":"<title>Ăn bánh Donut với C/C++ - CyStack Tutorial</title>\n<meta name=\"description\" content=\"Khám phá cách hiện thị Donut 3D trong C bằng ASCII. Giải thích thuật toán, công thức toán học và code chi tiết để tạo hiệu ứng donut xoay ngầu trên terminal.\"/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-video-preview:-1, max-image-preview:large\"/>\n<link rel=\"canonical\" href=\"https://blog.cystack.org/tutorial/vi/2025/10/02/donut-3d-trong-c/\" />\n<meta property=\"og:locale\" content=\"en_US\" />\n<meta property=\"og:type\" content=\"article\" />\n<meta property=\"og:title\" content=\"Ăn bánh Donut với C/C++ - CyStack Tutorial\" />\n<meta property=\"og:description\" content=\"Khám phá cách hiện thị Donut 3D trong C bằng ASCII. 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