G. exe exit code-CodePudding

I want to build in Qt c + + source code, could you tell me how to through the MinGW64 g + +. Exe exit code to determine whether the compile error?

 
Void MainWindow: : on_compile_clicked () 
{
//the file path 
QFile f (UI - & gt; Filename - & gt; The text ()); 

if (! F.e xists ()) {
//can't find the file 
QMessageBox: : warning (this, tr (" Not found "), tr (" File doesn \ 't exist!" )); 
return; 
} 

//generated parameter 
QStringList argument=genArgument (); 

//select compiler (currently only supports MinGW64) 
QString main=". "; 
The switch (compiler) {
Case MINGW64: main +="\ \ MINGW64 \ \ bin \ \ g + + exe"; break; 
} 

//compile 
QProcess * process=new QProcess (this); 
The process - & gt; SetProgram (main); 
The process - & gt; SetArguments (argument); 
Connect (process, SIGNAL (finished (int, QProcess: : ExitStatus)), and this, SLOT (CompileFinished (int, QProcess: : ExitStatus))); 
The connect (process, SIGNAL (readyRead ()), and this, SLOT (readyRead ())); 
The process - & gt; Start (). 
} 

Void MainWindow: : CompileFinished (int exitcode, QProcess: : ExitStatus status) {
//compile end 
}