c++中一次读取整个文件的内容的方法：
1. 读取至char*的情况
- std::ifstream t;
- int length;
- t.open("file.txt"); // open input file
- t.seekg(0, std::ios::end); // go to the end
- length = t.tellg(); // report location (this is the length)
- t.seekg(0, std::ios::beg); // go back to the beginning
- buffer = new char[length]; // allocate memory for a buffer of appropriate dimension
- t.read(buffer, length); // read the whole file into the buffer
- t.close(); // close file handle
-
- // ... do stuff with buffer here ...
2. 读取至std::string的情况
第一种方法：
- #include <string>
- #include <fstream>
- #include <streambuf>
-
- std::ifstream t("file.txt");
- std::string str((std::istreambuf_iterator<char>(t)),
- std::istreambuf_iterator<char>());
第二种方法：
- #include <string>
- #include <fstream>
- #include <sstream>
- std::ifstream t("file.txt");
- std::stringstream buffer;
- buffer << t.rdbuf();
- std::string contents(buffer.str());
reference:
http://stackoverflow.com/questions/2602013/read-whole-ascii-file-into-c-stdstring
本文内容由网友自发贡献，版权归原作者所有，本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容，请联系:hwhale#tublm.com(使用前将#替换为@)
