C ++-fstream和ofstream [英] c++ - fstream and ofstream

问题描述

两者之间有什么区别

fstream texfile;
textfile.open("Test.txt");

和

ofstream textfile;
textfile.open("Test.txt");

它们的功能是否相同?

推荐答案

ofstream仅具有用于输出的方法，因此例如，如果您尝试textfile >> whatever，它将无法编译. fstream可以用于输入和输出，尽管有效的方法取决于传递给构造函数/open的标志.

ofstream only has methods for outputting, so for instance if you tried textfile >> whatever it would not compile. fstream can be used for input and output, although what will work depends on the flags you pass to the constructor / open.

std::string s;
std::ofstream ostream("file");
std::fstream stream("file", stream.out);

ostream >> s; // compiler error
stream >> s; // no compiler error, but operation will fail.

这些评论还有一些要点.

The comments have some more great points.

这篇关于C ++-fstream和ofstream的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！