I want to append to a .txt file, adding directly after the last character in the file without going to a new line. How can I do that? If the file is empty, write at the beginning of it.

I used ios::app to write but the new data goes to next line, but I need it to be added in the same line with the old data, right after the last character.

ofstream fOut2;
fOut2.open("Temp/SchoolYear.csv", ios::out | ios::app);

fOut2 << y1 << “/” << y2 << “,”;