学步园

1.C语言函数fopen(),式例代码：

 //author:firehood<br /> //data: 2011-5-19</p> <p>#include <stdio.h><br /> #include <tchar.h></p> <p>int _tmain(int argc, _TCHAR* argv[])<br /> {<br /> // 创建或打开二进制文件,并以追加方式打开<br /> FILE *pFile=_tfopen(_T("//NAND2//FileLog1.txt"), _T("wab+"));<br /> if(pFile)<br /> {<br /> fwprintf(pFile, _T("%s/n"), _T("test1"));<br /> fwprintf(pFile, _T("%s/n"), _T("test2"));<br /> fwprintf(pFile, _T("%s/n"), _T("test3"));<br /> fclose(pFile);<br /> }</p> <p> // 读文件<br /> pFile=_tfopen(_T("//NAND2//FileLog1.txt"), _T("rb"));<br /> TCHAR str[20];<br /> if(pFile)<br /> {<br /> while(_ftscanf(pFile,_T("%s/n"),str)!=EOF)<br /> {<br /> _tprintf(_T("%s/n"),str);<br /> }<br /> fclose(pFile);<br /> }<br /> return 0;<br /> }</p> <p>

2.C++ fstream,式例代码：

//author:firehood<br /> //data: 2011-5-19</p> <p>#include <tchar.h><br /> #include <fstream><br /> #include <string><br /> #include <iostream><br /> using namespace std;</p> <p>int _tmain(int argc, _TCHAR* argv[])<br /> {<br /> fstream file;<br /> // 以追加方式打开文件，只写操作<br /> file.open("//NAND2//FileLog.txt", ios_base::out | ios_base::app);<br /> if(file.is_open())<br /> {<br /> file << "test1" << endl;<br /> file << "test2" << endl;<br /> file << "test3" << endl;<br /> file.flush();<br /> file.close();<br /> } </p> <p> // 以只读方式打开文件<br /> file.open("//NAND2//FileLog.txt", ios_base::in);<br /> if(!file.is_open())<br /> {<br /> cout << "Open file failed"<<endl;<br /> exit (1);<br /> }<br /> string str;<br /> while (!file.eof())<br /> {<br /> // 获取一行数据<br /> getline(file,str);<br /> cout << str.c_str() << endl;<br /> }<br /> file.close();<br /> return 0;<br /> }

3.mfc CFile、CStdioFile类

//author:firehood<br /> //data: 2011-5-19</p> <p>#include <tchar.h><br /> #include <afx.h></p> <p>int _tmain(int argc, _TCHAR* argv[])<br /> {<br /> CStdioFile cFile;<br /> // 写文件<br /> if(!cFile.Open(_T("//NAND2//FileLog2.txt"),CFile::modeCreate | CFile::modeWrite | CFile::typeBinary))<br /> {<br /> printf("Create file failed../n");<br /> return false;<br /> }</p> <p> cFile.WriteString(L"test1");<br /> cFile.WriteString(L"test2");<br /> cFile.WriteString(L"test3");<br /> cFile.Close();</p> <p> // 读文件<br /> if(!cFile.Open(_T("//NAND2//FileLog2.txt"),CFile::modeRead | CFile::typeBinary))<br /> {<br /> printf("Open file failed../n");<br /> return false;<br /> }<br /> CString str;<br /> while(cFile.ReadString(str))<br /> {<br /> // 输出<br /> _tprintf(_T("%s/n"),str);<br /> }<br /> cFile.Close();<br /> return 0;<br /> }

CFile 写文件操作示例，支持ANSI、UNICODE中文输出。

//author:firehood<br /> //data: 2011-5-19</p> <p>#include <tchar.h><br /> #include <afx.h></p> <p>int _tmain(int argc, _TCHAR* argv[])<br /> {<br /> CFile cFile;<br /> if(cFile.Open(_T("D://FileLog3.txt"),CFile::shareExclusive|CFile::modeCreate|CFile::modeWrite))<br /> {<br /> #ifdef _UNICODE<br /> ULONGLONG dwFileLen = cFile.GetLength();<br /> if (0 == dwFileLen) // 文件为空时写入UNICODE字节序标记<br /> {<br /> const unsigned char LeadBytes[] = {0xff, 0xfe};<br /> cFile.Write(LeadBytes, sizeof(LeadBytes));<br /> }<br /> #endif<br /> TCHAR *str=_T("中文字符串");<br /> cFile.Write(str,_tcslen(str)*sizeof(TCHAR));<br /> cFile.Close();<br /> }<br /> else<br /> {<br /> printf("Create file failed/n");<br /> }<br /> return 0;<br /> }