如何在c ++中重用字符串变量 [英] How to reuse a string variable in c++

问题描述

这是正确的，它工作正常

Is this correct, it works OK

string str("in.dat");
ifstream fin(str.c_str(), ios::binary | ios::ate );
.
.
.
//Do I need to clear the string before assigning new name???
str = "out.dat";
ofstream fout(str.c_str(), ios::binary); //seems to work

$ b $ p

Regards

推荐答案

其他人都说的是真的。但是，在你发布的代码中，你可以这么说：

What everyone else has said is true. However, in the code you posted you could just as well have said:

ifstream fin( "in.dat", ios::binary | ios::ate );
ofstream fout( "out.dat", ios::binary );

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