I got errors with my code...

ui->label->pixmap(":/new/prefix1/images/solve3.png");
also got errors with this code...

char[32] urr = ":/new/prefix1/images/solve3.png";
ui->label->pixmap(urr);

ERRORS:
/Users/martins/showhide/mainwindow.cpp:31: error: no matching function for call to 'QLabel:ixmap(const char [32])'

/Library/Frameworks/QtGui.framework/Headers/qlabel.h:75: note: candidates are: const QPixmap* QLabel:ixmap() const