help me to slove

[askrina]

I am tring to shift enter chararter by 2 . That mean char "A" to "c".

How it should work:
1> I collect QString from LineEdit.
2>Than get each ASCII value of SQtring
3> Add 2 to ASCII Value
4> Convert it to QString
5> Show it to Thru LineEdit2

QString pass3;
    QChar ch;
    int i,chValue;
 
 
    // Get Data
    QString str = ui->lineEdit->text();
 
    // QString to char array;
    for(i=0; i<=str.size();i++)
    {
        // converted to number
        ch=str.at(i).toAscii();
        chValue = ch.toAscii();
 
        chValue=chValue + 2;
 
        // Number to Charecter and string in QSTRING
        pass3 += QChar(chVale);
 
    }
 
    ui->lineEdit_2->setText(pass3);

QString pass3;
    QChar ch;
    int i,chValue;


    // Get Data
    QString str = ui->lineEdit->text();

    // QString to char array;
    for(i=0; i<=str.size();i++)
    {
        // converted to number
        ch=str.at(i).toAscii();
        chValue = ch.toAscii();

        chValue=chValue + 2;

        // Number to Charecter and string in QSTRING
        pass3 += QChar(chVale);

    }

    ui->lineEdit_2->setText(pass3);

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