如果缓冲区对于格式化文本(包括终止 null)来说太小,则将通过在buffer[0]处放置 null 字符而将缓冲区设置为空字符串,并调用无效的参数处理程序。 与_snprintf不同,sprintf_s可保证缓冲区以 null 终止(除非缓冲区大小为零)。 swprintf_s是sprintf_s的宽字符版本;swprintf_s的指针参数是宽字符串。swprintf_s...
使用sprintf,无法限制写入的字符数,这意味着使用sprintf的代码容易受到缓冲区溢出的影响。 请考虑使用相关函数snprintf,用于指定写入buffer的最大字符数,或使用_scprintf来确定需要多大的缓冲区。 同样,确保format不是用户定义的字符串。 从Windows 10 版本 2004(内部版本 19041)开始,printf系列函数根据 IEEE 754...
如果缓冲区对于格式化文本(包括终止 null)来说太小,则将通过在buffer[0]处放置 null 字符而将缓冲区设置为空字符串,并调用无效的参数处理程序。 与_snprintf不同,sprintf_s可保证缓冲区以 null 终止(除非缓冲区大小为零)。 swprintf_s是sprintf_s的宽字符版本;swprintf_s的指针参数是宽字符串。swprintf_s中...
There are versions of sprintf_s that offer additional control over what happens if the buffer is too small. For more information, see_snprintf_s, _snprintf_s_l, _snwprintf_s, _snwprintf_s_l. Generic-Text Routine Mappings .NET Framework Equivalent See Also Reference...
of the output buffer in characters. If the buffer is too small for the text being printed then the buffer is set to an empty string and the invalid parameter handler is invoked. Unlike snprintf, sprintf_s guarantees that the buffer will be null-terminated (unless the buffer size is zero)...
of the output buffer in characters. If the buffer is too small for the text being printed then the buffer is set to an empty string and the invalid parameter handler is invoked. Unlike snprintf, sprintf_s guarantees that the buffer will be null-terminated (unless the buffer size is zero)...
predict. Usesnprintf() andvsnprintf() instead (orasprintf(3) andvasprintf(3)). Code such asprintf(foo);often indicates a bug, sincefoomay contain a % character. Iffoocomes from untrusted user input, it may contain%n, causing theprintf() call to write to memory and creating a security ...
for the formatted text, including the terminating null, then the buffer is set to an empty string by placing a null character atbuffer[0], and the invalid parameter handler is invoked. Unlike_snprintf,sprintf_sguarantees that the buffer will be null-terminated unless the buffer size is zero....
); (1) int fprintf( std::FILE* stream, const char* format, ... ); (2) int sprintf( char* buffer, const char* format, ... ); (3) int snprintf( char* buffer, std::size_t buf_size, const char* format, ... ); (4) (since C++11) ...
printf 系列 函数 根据 下述的 format 参数 生成 输出内容. printf 和 vprintf 函数 把 输出内容 写到 stdout, 即 标准输出流; fprintf 和 vfprintf 函数 把 输出内容 写到 给定的 stream 流; sprintf, snprintf, vsprintf 和 vsnprintf 函数 把 输出内容 存放到 字符串 str 中. ...