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Ctrl + Alt + T terminal directly vim hello.cpp enter the command line mode, press the "i" into insert mode, you can paste and other editing. Then click the "ESC", to return to the command line mode, enter the press ":" colon to enter the bottom line mode: w filename (enter "w filename" the article to save the file name specified filename): wq (Enter "wq", save and exit vi) clear qmake -project -> .pro qmake -> makefile make -> exe .pro wenjian jibenxinxi many file use .pro jilu file information different OS different makefile but same .pro time uncertain, so all jianting zhuyunxingxunhuan dongli -> (click jianpan) shijian to learn: xie jiemian; chuli click mainwindow jichengzi Qmainwindow