inet_ntoa返回乱码

2015-11-14 12:58:16 227 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

MySQL IPv6 地址存储与查询：INET6_ATON/NTOA 函数使用详解与3个常见误区本文详细解析MySQL中IPv6地址的高效存储与查询方法，重点介绍INET6_ATON和INET6_NTOA函数的使用技巧，并揭示三个常见操作误区。通过对比不同存储方案的优劣，推荐使用VARBINARY(16)存储IPv6地址，以提升查询性能和节省存储空间。阅读详情

addrSrv.sin_addr.S_un.S_addr = inet_addr("192.168.0.2");

		addrSrv.sin_family = AF_INET;

		addrSrv.sin_port = htons(6000);



		wsprintf(szBuffer, TEXT("IP %s"), inet_ntoa(addrSrv.sin_addr));

运行结果: 㤱⸲㘱⸸⸰2몭몭몭몭몭

...全文

大厂通用的MySQL开发规范设计，包括“存储引擎、字符集、命名规则等公共约定”，“表设计约定”，“字段设计约定”，“索引设计约定”，“SQL约定”，“开发人员行为约定” 前言在开发人员进行项目或者产品开发之前，总是有千百万个不确定，不确定“存储引擎“的该使用哪个？该用那个”字符集“？该遵循那种”命名规则“？“表设计约定”有哪些？“字段设计约定”怎样才更优秀？“索引设计约定”该如何设计？有没有规范的“SQL约定”？对于开发人员，有哪些“开发人员行为约定”，需要遵守？下文，既是综合BAT大厂的MySQL开发规范设计，包括“存储引擎、字符集、命名规则等公共约定”，“表设计约定”，“字段设计约定”，“索引设计约定”，“SQL约定”，“开发人员行为约定”，建议收.. 阅读详情

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zhk_0424 2015-11-17

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楼上正解，用sprintf

赵4老师 2015-11-17

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sprintf, swprintf Write formatted data to a string. int sprintf( char *buffer, const char *format [, argument] ... ); int swprintf( wchar_t *buffer, const wchar_t *format [, argument] ... ); Routine Required Header Compatibility sprintf <stdio.h> ANSI, Win 95, Win NT swprintf <stdio.h> or <wchar.h> ANSI, Win 95, Win NT For additional compatibility information, see Compatibility in the Introduction. Libraries LIBC.LIB Single thread static library, retail version LIBCMT.LIB Multithread static library, retail version MSVCRT.LIB Import library for MSVCRT.DLL, retail version Return Value sprintf returns the number of bytes stored in buffer, not counting the terminating null character. swprintf returns the number of wide characters stored in buffer, not counting the terminating null wide character. Parameters buffer Storage location for output format Format-control string argument Optional arguments For more information, see Format Specifications. Remarks The sprintf function formats and stores a series of characters and values in buffer. Each argument (if any) is converted and output according to the corresponding format specification in format. The format consists of ordinary characters and has the same form and function as the format argument for printf. A null character is appended after the last character written. If copying occurs between strings that overlap, the behavior is undefined. swprintf is a wide-character version of sprintf; the pointer arguments to swprintf are wide-character strings. Detection of encoding errors in swprintf may differ from that in sprintf. swprintf and fwprintf behave identically except that swprintf writes output to a string rather than to a destination of type FILE. Generic-Text Routine Mappings TCHAR.H Routine _UNICODE & _MBCS Not Defined _MBCS Defined _UNICODE Defined _stprintf sprintf sprintf swprintf Example /* SPRINTF.C: This program uses sprintf to format various * data and place them in the string named buffer. */ #include <stdio.h> void main( void ) { char buffer[200], s[] = "computer", c = 'l'; int i = 35, j; float fp = 1.7320534f; /* Format and print various data: */ j = sprintf( buffer, "\tString: %s\n", s ); j += sprintf( buffer + j, "\tCharacter: %c\n", c ); j += sprintf( buffer + j, "\tInteger: %d\n", i ); j += sprintf( buffer + j, "\tReal: %f\n", fp ); printf( "Output:\n%s\ncharacter count = %d\n", buffer, j ); } Output Output: String: computer Character: l Integer: 35 Real: 1.732053 character count = 71 Stream I/O Routines See Also _snprintf, fprintf, printf, scanf, sscanf, vprintf Functions

南京短暂的春天 2015-11-17

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你如果用的是vc6，且默认的字符集为_MBCS，多字节字符集环境那么你就不能用w开头的unicode专用函数，因为字符编码是互不兼容的你在TEXT宏上按F12就能看到当前宏展开是什么情况如果是没有定义UNICODE宏，那么是按如下逻辑展开 #define __TEXT(quote) quote 也就是不做任何处理如果定义了UNICODE宏，则按 #define __TEXT(quote) L##quote 将你的代码套进来就是L"IP %s" 即为宽字符字符串常量但你的编译环境显然是没有定义UNICODE宏的则实际展开为"IP %s"，即默认的多字节字符集环境

笨笨仔 2015-11-17

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引用楼主 a785214563 的回复:

addrSrv.sin_addr.S_un.S_addr = inet_addr("192.168.0.2");
		addrSrv.sin_family = AF_INET;
		addrSrv.sin_port = htons(6000);

		wsprintf(szBuffer, TEXT("IP %s"), inet_ntoa(addrSrv.sin_addr));

运行结果: 㤱⸲㘱⸸⸰2몭몭몭몭몭

这涉及到你收到的字符编码类型是否需要进行转换的问题。

zwfgdlc 2015-11-16

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inet_ntoa返回的是char*类型 wsprintf是格式化UNICODE字符串的. 用inet_ntoa就用sprintf格式化字符串一定要用wsprintf就用WSAAddressToString返回UNICODE编码IP字串

Magic丶旭 2015-11-16

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先把缓冲区用0填充一下，看看是不是没有空终止

inet_ntoa返回乱码

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