c++ - Writing a matrix to a file -

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I have a problem when trying to write a matrix in a file. I manage to open a text file, but instead of being displayed instead of a 3x3 matrix there is a long number which is an error.

I have the code 

  outf.open "Out2.txt"); Cout & lt; & Lt; "Please enter the output file (out 2. txt \ n"; cin & gt; & gt; outfile; if (outfile == "out.txt"); {outf & lt; & lt; "Matrix X and Matrix Y Yoga is: "

The solution is probably very trivial, but I can not find solutions online!

You must write matrix elements individually 

  Lt; & lt; Yoga [0] [0] <<

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