C语言中字符串"\x81\x05\xE0\x5A\x47\x00\x01\x00"代表什么 c语言int c;c='\xe0';printf("%d",...
\x c++\u91cc\u9762\u7684\u8f6c\u4e49\u5b57\u7b26'\x1A'\u4ed6\u662f\u4e00\u4e2a\u8f6c\u4e49\u5b57\u7b26\u7684\uff0c\u5728C\u8bed\u8a00\u4e2d\u5e38\u4f7f\u7528\u201c\\u201d\u4f5c\u4e3a\u5f15\u5bfc\u7b26\u7684\u7279\u6b8a\u5b57\u7b26\u5e8f\u5217\uff0c\u7528\u4e8e\u4ee3\u8868\u67d0\u4e00\u4e2a\u7279\u5b9a\u7684ASCII\u7801\u5b57\u7b26\u3002\u6b64\u79cd\u5b57\u7b26\u5e38\u5e38\u88ab\u79f0\u4e3a\u8f6c\u4e49\u5b57\u7b26\uff0c\u88ab\u5e38\u7528\u4e8e\u8f93\u51fa\u51fd\u6570printf()\u4e2d\u7528\u4e8e\u63a7\u5236\u8f93\u51fa\u683c\u5f0f\u3002
\u53cd\u659c\u7ebf\u201c\\u201d\u540e\u7684\u5341\u516d\u8fdb\u5236\u6570\u53ea\u80fd\u4ee5\u5c0f\u5199\u5b57\u6bcdx\u5f00\u5934\uff0c\u4e0d\u5141\u8bb8\u4f7f\u7528\u5927\u5199\u5b57\u6bcdA\u6216\u80050x\u5f00\u5934\uff0c\u5982\u2018\x41\u2019\u4ee3\u8868\u5b57\u7b26\u5e38\u91cf'A'\u7b49\u3002 \u4e5f\u53ef\u4ee5\u5728\u4e00\u5bf9\u5355\u5f15\u53f7\u5185\u7528\u53cd\u659c\u7ebf\u8ddf\u4e00\u4e2a\u5341\u516d\u8fdb\u5236\u6570\u6765\u8868\u793a\u4e00\u4e2a\u5b57\u7b26\u5e38\u91cf\u3002
\u5341\u516d\u8fdb\u5236\u7684\u7b97\u6cd5\u4e0e\u5341\u8fdb\u5236\u7c7b\u4f3c\uff0c\u6bd4\u5982\u5341\u8fdb\u5236\u4e2d123.456\u53ef\u4ee5\u62c6\u5206\u4e3a1\u00d710^2+2\u00d710^1+3\u00d710^0+4\u00d710^-1+5\u00d710^-2+6\u00d710^-3=123.456.\u540c\u6837\u7684\u9053\u7406\uff0c\u5728\u5341\u516d\u8fdb\u5236\u4e2d\u6bd4\u5982\uff1a12A.2\u5316\u4e3a\u5341\u8fdb\u5236\u4e3a1\u00d716^2+2\u00d716^1+10\u00d716^0+2\u00d716^-1=298.125\u3002\u4ee5\u6b64\uff0c\u9898\u76ee\u4e2d\u76841A\u5316\u4e3a\u5341\u8fdb\u5236\u5c31\u662f1\u00d716^1+10\u00d716^0=26.
\u7279\u522b\u6ce8\u610f\u7684\u662f\u5728\u5341\u516d\u8fdb\u5236\u4e2d10\uff0c11\uff0c12\uff0c13\uff0c14\uff0c15\u5206\u522b\u4f7f\u7528\u5b57\u6bcdA,B,C,D,E,F\u8868\u793a\u3002
int c;c='\xe0';0107F0A8 mov dword ptr [c],0FFFFFFE0h printf("%d",c);0107F0AF mov esi,esp 0107F0B1 mov eax,dword ptr [c] 0107F0B4 push eax 0107F0B5 push 11623D8h 0107F0BA call dword ptr ds:[116A590h] 0107F0C0 add esp,8\x\u8868\u793a\u5341\u516d\u8fdb\u5236\u8f6c\u4e49\uff0c'\xe0' \u662f\u4e00\u4e2a\u5b57\u7b26\uff0c\u8fd9\u4e2a\u5b57\u7b26\u7684\u503c = 0xE0 = 11100000\uff0c\u5c06\u5176\u8d4b\u503c\u7ed9 int c \u7684\u65f6\u5019\uff0c\u4f1a\u4ece1\u5b57\u8282\u6269\u5c55\u52304\u5b57\u8282\uff0c\u7531\u4e8e\u7b26\u53f7\u4f4d\uff08\u6700\u9ad8\u4f4d\uff09\u4e3a1\uff0c\u90a3\u4e48\u6269\u5c55\u8fc7\u7a0b\u4e2d\uff0c\u9ad8\u4f4d\u5168\u90e8\u586b1\uff0c\u6240\u4ee5 c \u7684\u5185\u5b58\u6570\u636e\u5c31\u88ab\u6269\u5c55\u6210\u4e86 0xFFFFFFE0\uff0c0xFFFFFFE0 \u8fd9\u662f\u4e00\u4e2a\u8865\u7801\uff0c\u53ef\u4ee5\u7b97\u51fa\u5b83\u7684\u539f\u7801\u662f0x80000020\uff0c\u8f6c\u6362\u4e3a10\u8fdb\u5236\uff0c\u5b83\u7684\u503c\u662f -32,\u6240\u4ee5\u4f1a\u8f93\u51fa -32\u3002
以下这两种表示方式实际上是等价的：
char xx[]="\x81\x05\xE0\x5A\x47\x00\x01\x00";
char xx[]={0x81,0x05,0xE0,0x5A,0x47,0x00,0x01,0x00,0x00};
注意，后面应该多一个0x00，因为第一种是字符串表达方式，编译器会自动增加结束符0.
利用十六进制表示的转义字符而已
http://baike.baidu.com/link?url=U3L8SBPNFZjqSri937uICRumYrhKhLuk9d2X5emJ5W5Gl6tDj6Cf5qvRH25PvSFoGABNRxO3IvOx5frxwxd3M_
错误的不一样
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