void linearpage::on_comboBox_currentIndexChanged(const int &index)
{
qDebug()<<QString::number(flag_operate)<<ui->comboBox->currentText()<<index;
flag_operate = ui->comboBox->currentIndex();//0是+,1是-,2是*,3是/
}
预期:flag_operate被赋值为0、1、2、3
实际情况:
"0" "+" 0
"0" "-" 1
"1" "×" 2
"2" "÷" 3
currentIndex()的返回值不符合预期
请问currentIndex返回的是什么?