How to use C++ <fstream> output files with Xcode?

i learning c++ @ school, have mac , started using xcode. use fstream library.
need know ".out" file located or how create it.
managed create input file , if use "cout" display result works. hope explained well, here basic program show mean:

#include <fstream>
using namespace std;
int main()
{
int a,b;
ifstream in("test.in");
ofstream out("test.out");
in>>a>>b;
out<<"a+b= "<<a+b;
}

 

your code creates output file. in case, created in folder run program. if running within xcode, can set working directory, or use default. i'm not sure default location is.

 

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