visual c++ - overwriting in a .txt file -



visual c++ - overwriting in a .txt file -

i'm writing code visual c++. target writing double values in .txt file. problem i'm passing in cicle , everytime there's file overwrite , can see lastly value. (the values of marker1, marker2, marker3 alter in every cicle).

ofstream myfile; myfile.open("c:/mattia_progetto/linescannerrealtime/markers.txt"); myfile<<marker1[0]<<"\t"<<marker1[1]<<"\t"<<marker1[2]<<"\t"<<marker2[0]<<"\t"<<marker2[1]<<"\t"<<marker2[3]<<"\t"<<marker3[0]<<"\t"<<marker3[1]<<"\t"<<marker3[2]; myfile.close();

how can solve it?

pass ios::app mode flag myfile.open() append file instead of overwriting contents.

see: http://en.cppreference.com/w/cpp/io/basic_ofstream/open

visual-c++

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