ITPub博客

首页 > 应用开发 > IT综合 > 入门计划->使用(C++库)fstream读写文件 (转)

入门计划->使用(C++库)fstream读写文件 (转)

原创 IT综合 作者:amyz 时间:2007-11-10 19:09:33 0 删除 编辑
入门计划->使用(C++库)fstream读写文件 (转)[@more@]

原创+收藏

//awzzz@2002 //入门计划->使用(C++库)fstream读写文件 //APO->using fstream. //accidence project of using fstream.(c++ iostream library) /* Reference: http://www.cplusplus.com/ref/iostream/fstream/ Description fstream class provides a stream interface to read and write data from/to files. The class mantains internally (privately) a pointer to a filebuf object in charge of the interaction with the file. This pointer can be obtained/modified by calling member rdbuf. The file to be processed can be specified as a parameter for the constructor or by calling member open. After a file is processed it can be closed by calling member close. In this case the file stream may be used to open another file. Member is_open can be used to deteRmine wether the stream is currently operating on a file or not. Please refer to parent classes for more details on information mantained by an fstream object. */ //使用(C++库)fstream读写文件 //simple example #include #include using namespace std; #ifdef win32 #define TEST_FILE "c:tmptest.txt" #else #define TEST_FILE "/tmp/test.txt" #endif void test() { { //fstream sfs; //sfs.open(TEST_FILE, ios_base::out); fstream sfs(TEST_FILE, ios_base::out); char buf[] = "1234567890"; sfs.write(buf, sizeof(buf)); sfs.close(); } { int len; char* buf; //fstream sfs; //sfs.open(TEST_FILE); fstream sfs(TEST_FILE); sfs.seekg (0, ios::end); len = sfs.tellg(); sfs.seekg (0, ios::beg); buf = new char[len]; sfs.read(buf, len); cout << buf << endl; delete []buf; sfs.close(); } } int main(int argc, char* argv[]) { test(); return 0; }


来自 “ ITPUB博客 ” ,链接:http://blog.itpub.net/10752019/viewspace-981610/,如需转载,请注明出处,否则将追究法律责任。

请登录后发表评论 登录
全部评论
  • 博文量
    3984
  • 访问量
    7335292