{"id":3937,"date":"2014-02-12T02:21:44","date_gmt":"2014-02-11T17:21:44","guid":{"rendered":"http:\/\/www.vincentina.net\/?p=3937"},"modified":"2016-02-09T22:35:56","modified_gmt":"2016-02-09T13:35:56","slug":"math-h%e3%82%92%e3%82%a4%e3%83%b3%e3%82%af%e3%83%ab%e3%83%bc%e3%83%89%e3%81%97%e3%81%a6%e6%95%b0%e5%ad%a6%e9%96%a2%e6%95%b0%e3%82%92%e4%bd%bf%e3%81%86%e5%a0%b4%e5%90%88%e3%81%abgcc%e3%81%a0%e3%81%91-2","status":"publish","type":"post","link":"https:\/\/www.vincentina.net\/?p=3937","title":{"rendered":"math.h\u3092\u30a4\u30f3\u30af\u30eb\u30fc\u30c9\u3057\u3066\u6570\u5b66\u95a2\u6570\u3092\u4f7f\u3046\u5834\u5408\u306bgcc\u3060\u3051\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u3067\u304d\u306a\u3044\u672c\u5f53\u306e\u7406\u7531\u306f\uff1f\uff1f \u305d\u306e2"},"content":{"rendered":"

\u304b\u307c\u3061\u3083\u3055\u3093\u3088\u308a\u30b3\u30e1\u30f3\u30c8\u3092\u9802\u3044\u3066\u3001\u524d\u3005\u56de\u304f\u3089\u3044\u306b\u3084\u3063\u305f\u30bf\u30a4\u30c8\u30eb\u306e\u30c6\u30fc\u30de\u3092\u691c\u8a3c\u9802\u304d\u307e\u3057\u305f\u3002<\/p>\n

\n
\n

\u304b\u307c\u3061\u3083\u3055\u3093\u306e\u30da\u30fc\u30b8<\/p>\n

Blue Sparrow<\/a>
\n\u901a\u4fe1\u7de8\u76ee<\/del>
\n \u691c\u8a3c\u30da\u30fc\u30b8<\/del><\/h1>\n

\u30b3\u30f3\u30d1\u30a4\u30eb\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u306e\u5207\u308a\u5206\u3051\u306f\u5168\u304f\u305d\u306e\u767a\u60f3\u306f\u306a\u304b\u3063\u305f<\/span>\u3067\u3059\u3002
\n\u304b\u307c\u3061\u3083\u3055\u3093\u306e\u30d6\u30ed\u30b0\u3092\u898b\u3066\u3066\u3001\u306a\u3093\u3068\u306a\u304fstrace\u3092\u601d\u3044\u51fa\u3057\u305f\u306e\u3067\u3084\u3063\u3066\u307f\u305f\u3002<\/p>\n

\u3066\u3044\u3046\u304b\u30b3\u30de\u30f3\u30c9\u3092\u77e5\u3063\u3066\u308b\u3060\u3051<\/span>\u3067\u5185\u5bb9\u306f\u5168\u7136\u5206\u304b\u308a\u307e\u305b\u3093\u3002
\n\u3067\u3082\u304b\u307c\u3061\u3083\u3055\u3093\u306e\u4e88\u6e2c\u3067\u3082libm\u3068\u304b\u51fa\u3066\u305f\u306e\u3067\u5168\u304f\u898b\u5f53\u306f\u305a\u308c\u3067\u3082\u306a\u3044\u3068\u601d\u3046\u3093\u3060\u3002<\/p>\n

\u7d50\u679c\u3092\u30c0\u30a4\u30b8\u30a7\u30b9\u30c8\u3067\u3069\u3046\u305e\u3002<\/p>\n

\u524d\u3075\u308a\u3068\u3057\u3066\u3001\u307e\u305a\u306f\u5b9a\u6570\u7248\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u7528\u610f<\/p>\n

$ gcc kencho2.c -o teisu -Wall<\/pre>\n
\u7d9a\u3044\u3066\u5909\u6570\u7248\u3092\u6700\u9069\u5316\u3057\u305f\u3082\u306e\u3068\u6b63\u898f\uff1f\u306e-lm\u3092\u3064\u3051\u3066\u30b3\u30f3\u30d1\u30a4\u30ea\u307e\u3059\u3002<\/p>\n
gcc kencho.c -o hensu3 -Wall -O3\ngcc kencho.c -o hensuseiki -Wall -lm<\/pre>\n
\u3053\u3061\u3089\u306e\u74b0\u5883\u3067\u3082\u30b3\u30f3\u30d1\u30a4\u30eb\u306f\u554f\u984c\u306a\u304b\u3063\u305f\u3067\u3059\u3002
\n\u30ea\u30dd\u30b8\u30c8\u30ea\u306fSL\u3067\u3001gcc version 4.4.7 20120313 (Red Hat 4.4.7-4) (GCC)\u3067\u3059\u3002
\n\u3067\u306fstrace\u3067\u52d5\u304d\u3092\u898b\u3066\u307f\u307e\u3059\u3002open\u306b\u6ce8\u76ee\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
$ strace .\/teisu\nexecve(\".\/teisu\", [\".\/teisu\"], [\/* 21 vars *\/]) = 0\nbrk(0)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 = 0x10a9000\nmmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f821d16f000\naccess(\"\/etc\/ld.so.preload\", R_OK)\u00a0\u00a0\u00a0\u00a0\u00a0 = -1 ENOENT (No such file or directory)\nopen(\"\/etc\/ld.so.cache\", O_RDONLY)\u00a0\u00a0\u00a0\u00a0\u00a0 = 3\nfstat(3, {st_mode=S_IFREG|0644, st_size=14638, ...}) = 0\nmmap(NULL, 14638, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f821d16b000\nclose(3)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 = 0\nopen(\"\/lib64\/libc.so.6\", O_RDONLY)\u00a0\u00a0\u00a0\u00a0\u00a0 = 3\nread(3, \"\\177ELF\\2\\1\\1\\3\\0\\0\\0\\0\\0\\0\\0\\0\\3\\0>\\0\\1\\0\\0\\0000\\356\\1\\0\\0\\0\\0\\0\"..., 832) = 832\nfstat(3, {st_mode=S_IFREG|0755, st_size=1921216, ...}) = 0\nmmap(NULL, 3750152, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f821cbbd000\nmprotect(0x7f821cd48000, 2093056, PROT_NONE) = 0\nmmap(0x7f821cf47000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x18a000) = 0x7f821cf47000\nmmap(0x7f821cf4c000, 18696, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f821cf4c000\nclose(3)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 = 0\nmmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f821d16a000\nmmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f821d169000\nmmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f821d168000\narch_prctl(ARCH_SET_FS, 0x7f821d169700) = 0\nmprotect(0x7f821cf47000, 16384, PROT_READ) = 0\nmprotect(0x7f821d170000, 4096, PROT_READ) = 0\nmunmap(0x7f821d16b000, 14638)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 = 0\nfstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0\nmmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f821d16e000\nwrite(1, \"10.000\\n\", 710.000\n)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 = 7\nexit_group(0)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 = ?<\/pre>\n
$ strace .\/hensu3\nexecve(\".\/hensu3\", [\".\/hensu3\"], [\/* 21 vars *\/]) = 0\nbrk(0)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 = 0x242b000\nmmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fac367be000\naccess(\"\/etc\/ld.so.preload\", R_OK)\u00a0\u00a0\u00a0\u00a0\u00a0 = -1 ENOENT (No such file or directory)\nopen(\"\/etc\/ld.so.cache\", O_RDONLY)\u00a0\u00a0\u00a0\u00a0\u00a0 = 3\nfstat(3, {st_mode=S_IFREG|0644, st_size=14638, ...}) = 0\nmmap(NULL, 14638, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fac367ba000\nclose(3)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 = 0\nopen(\"\/lib64\/libc.so.6\", O_RDONLY)\u00a0\u00a0\u00a0\u00a0\u00a0 = 3\nread(3, \"\\177ELF\\2\\1\\1\\3\\0\\0\\0\\0\\0\\0\\0\\0\\3\\0>\\0\\1\\0\\0\\0000\\356\\1\\0\\0\\0\\0\\0\"..., 832) = 832\nfstat(3, {st_mode=S_IFREG|0755, st_size=1921216, ...}) = 0\nmmap(NULL, 3750152, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fac3620c000\nmprotect(0x7fac36397000, 2093056, PROT_NONE) = 0\nmmap(0x7fac36596000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x18a000) = 0x7fac36596000\nmmap(0x7fac3659b000, 18696, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fac3659b000\nclose(3)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 = 0\nmmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fac367b9000\nmmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fac367b8000\nmmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fac367b7000\narch_prctl(ARCH_SET_FS, 0x7fac367b8700) = 0\nmprotect(0x7fac36596000, 16384, PROT_READ) = 0\nmprotect(0x7fac367bf000, 4096, PROT_READ) = 0\nmunmap(0x7fac367ba000, 14638)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 = 0\nfstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0\nmmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fac367bd000\nwrite(1, \"10.000\\n\", 710.000\n)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 = 7\nexit_group(0)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 = ?\n\n<\/pre>\n
$ strace .\/hensuseiki\nexecve(\".\/hensuseiki\", [\".\/hensuseiki\"], [\/* 21 vars *\/]) = 0\nbrk(0)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 = 0x17bf000\nmmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb9bbe1a000\naccess(\"\/etc\/ld.so.preload\", R_OK)\u00a0\u00a0\u00a0\u00a0\u00a0 = -1 ENOENT (No such file or directory)\nopen(\"\/etc\/ld.so.cache\", O_RDONLY)\u00a0\u00a0\u00a0\u00a0\u00a0 = 3\nfstat(3, {st_mode=S_IFREG|0644, st_size=14638, ...}) = 0\nmmap(NULL, 14638, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fb9bbe16000\nclose(3)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 = 0\nopen(\"\/lib64\/libm.so.6\", O_RDONLY)\u00a0\u00a0\u00a0\u00a0\u00a0 = 3\nread(3, \"\\177ELF\\2\\1\\1\\3\\0\\0\\0\\0\\0\\0\\0\\0\\3\\0>\\0\\1\\0\\0\\0p>\\0\\0\\0\\0\\0\\0\"..., 832) = 832\nfstat(3, {st_mode=S_IFREG|0755, st_size=596264, ...}) = 0\nmmap(NULL, 2633912, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fb9bb978000\nmprotect(0x7fb9bb9fb000, 2093056, PROT_NONE) = 0\nmmap(0x7fb9bbbfa000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x82000) = 0x7fb9bbbfa000\nclose(3)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 = 0\nopen(\"\/lib64\/libc.so.6\", O_RDONLY)\u00a0\u00a0\u00a0\u00a0\u00a0 = 3\nread(3, \"\\177ELF\\2\\1\\1\\3\\0\\0\\0\\0\\0\\0\\0\\0\\3\\0>\\0\\1\\0\\0\\0000\\356\\1\\0\\0\\0\\0\\0\"..., 832) = 832\nfstat(3, {st_mode=S_IFREG|0755, st_size=1921216, ...}) = 0\nmmap(NULL, 3750152, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fb9bb5e4000\nmprotect(0x7fb9bb76f000, 2093056, PROT_NONE) = 0\nmmap(0x7fb9bb96e000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x18a000) = 0x7fb9bb96e000\nmmap(0x7fb9bb973000, 18696, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fb9bb973000\nclose(3)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 = 0\nmmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb9bbe15000\nmmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb9bbe14000\nmmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb9bbe13000\narch_prctl(ARCH_SET_FS, 0x7fb9bbe14700) = 0\nmprotect(0x7fb9bb96e000, 16384, PROT_READ) = 0\nmprotect(0x7fb9bbbfa000, 4096, PROT_READ) = 0\nmprotect(0x7fb9bbe1b000, 4096, PROT_READ) = 0\nmunmap(0x7fb9bbe16000, 14638)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 = 0\nfstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0\nmmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb9bbe19000\nwrite(1, \"10.000\\n\", 710.000\n)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 = 7\nexit_group(0)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 = ?<\/pre>\n
\u3053\u3053\u3067\u78ba\u8a8d\u3067\u304d\u305f\u306e\u304c-lm\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u305f\u3082\u306e\u3060\u3051\/lib64\/libm.so.6\u3092\u547c\u3073\u51fa\u3057\u3066\u3044\u3066\u3001\u5b9a\u6570\u306e\u3082\u306e\u3068\u5909\u6570\u3092\u6700\u9069\u5316\u3057\u305f\u3082\u306e\u306f\/lib64\/libc.so.6\u306e\u547c\u3073\u51fa\u3057\u3060\u3051\u3067\u5b9f\u884c\u3067\u304d\u3066\u3044\u308b\u69d8\u5b50\u3002<\/p>\n
\u3068\u306a\u308b\u3068\u3001\u304b\u307c\u3061\u3083\u3055\u3093\u306e\u691c\u8a3c\u7d50\u679c\u304b\u3089\u3002<\/p>\n
\u5f15\u6570\u306b\u5b9a\u6570\u3092\u5165\u308c\u305f\u3068\u304d\u30d0\u30a4\u30ca\u30ea\u306b\u8a08\u7b97\u7d50\u679c\u306e\u307f\u304c\u53cd\u6620\u3055\u308c\uff0c\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30d5\u30a1\u30a4\u30eb\u3092\u7121\u8996\u3059\u308b<\/span><\/p>\n
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 <\/p>\n
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 <\/p>\n<\/div>\n<\/div>\n
        
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\n","protected":false},"excerpt":{"rendered":"
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