请问QT中 如何实现lineEdit1/lineEdit2，类似于Vb中 jtxt.Item(2).Text = Format(jtxt.Item(3).Text / jtxt.Item(1).Text, "0.000")

Question

jtxt.Item(2).Text = Format(jtxt.Item(3).Text / jtxt.Item(1).Text, "0.000")

Answer 1

QString str1=lineEdit1->Text();
double val1=str1.toDouble();
QString str2=lineEdit2->Text();
double val2=str2.toDouble();
QString result = QString::number(val1/val2,10,3);
lineEdit2->setText(result);