running a cmd command using Qt

[SirJonas]

Hello im doing one program that i will run a command in cmd.

QProcess pro;
pro.startDetached("cmd.exe /k ping 1.1.1.1 -n 1 -w 3000 > Nul & Del " + QApplication::applicationFilePath());

QProcess pro;
pro.startDetached("cmd.exe /k ping 1.1.1.1 -n 1 -w 3000 > Nul & Del " + QApplication::applicationFilePath());

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But when i do this, show me this error:
FHVHN.png
I think the problem is QApplication::applicationFilePath()
How i could solve it?