文件读写(Windows API)--ReadFile、WriteFile - 简书

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NULL ); BOOL WINAPI ReadFile( __in HANDLE hFile, // 文件句柄 __out LPVOID lpBuffer, // 接收数据用的 buffer __in DWORD nNumberOfBytesToRead, // 要读取的字节数 __out LPDWORD lpNumberOfBytesRead, // 实际读取到的字节数 __in LPOVERLAPPED lpOverlapped // OVERLAPPED 结构,一般设定为 NULL ); BOOL WINAPI WriteFile( __in HANDLE hFile, // 文件句柄 __in LPCVOID DWORD nRead; ReadFile(hout, buff2, 40, &nRead, NULL); Also, rename hin and hout. share | improve this answer | follow | answered Oct 24 '10 at 22:25. Abyx Abyx. 10.4k 4 4 gold badges 34 34 silver badges 71 71 bronze badges. add a comment | 6. Others have already answered your question. This is about the code. // Your code: // System Programming.cpp : Defines the entry point for the console c windows file winapi. share | follow | edited Apr 1 '13 at 11:05. Anish Ramaswamy. 2,206 3 3 gold badges 24 24 silver badges 62 62 bronze badges. asked Apr 1 '13 at 8:04. Ayse Ayse. 2,336 9 9 gold badges 32 32 silver badges 54 54 bronze badges. add a comment | 4 Answers Active ReadFile() is not a substitute for fscanf(). Since the file doesn't appear to contain anything that's suitable for human eyes, most definitely not a string, the only proper way to display something recognizable is by showing the hex representation of the bytes. Use printf() with the %x format specifier in a loop. BOOL WINAPI ReadFile( _In_ HANDLE hFile, _Out_ LPVOID lpBuffer, _In_ DWORD nNumberOfBytesToRead, _Out_opt_ LPDWORD lpNumberOfBytesRead, _Inout_opt_ LPOVERLAPPED lpOverlapped ); 参数: hFile. 函数指针. lpBuffer. 指针指向从文件读出的数据存放的缓冲区. nNumberOfBytesToRead

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