c++ - Editing the file in Qt -

let's have .csv file follows:

1,2,5,5, 0,5,6,9, 3,2,5,7, 1,2,3,6, 

how can delete ',' sign @ end of each line?

p.s. example know how clean space @ end of line - file.readline().trimmed();, how same other signs, have no idea.

assuming know how read line line, crude method works:

qstring teststr = qstring("1,2,5,5,");  qstringlist testlist = teststr.split(","); qdebug() << "testlist" << testlist;  testlist.removelast(); qdebug() << "testlist" << testlist;  teststr = testlist.join(","); qdebug() << "teststr" << teststr; 

// output

testlist ("1", "2", "5", "5", "")  testlist ("1", "2", "5", "5")  teststr "1,2,5,5"