Conversion from a string to the ascii decimal value and get the total sum

[gede]

Hi all, I'm starting to learn C ++ and Qt, I'm really a beginner.
I want to do a conversion from a string to the ascii decimal value and get the total sum.
Example:
String in: 12ab
Sum is: 294 (49 + 50 + 97 + 98)
I can't enter the ascii decimal value in the array.
Maybe it's not the right way, and I'm complicating everything, but it was for practice.

I enclose the code

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QDebug>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::on_pushButton_convert_clicked()
{
    /*
     * conversion from "string" to "sum value ascii"
     */
    QString StrIn = ui->lineEdit_string_in->text();
    QStringList numberStrIn;
    for(const auto character: StrIn){
        numberStrIn << QString::number(character.unicode(), 10);
    }
    QString StrOut = numberStrIn.join(" ");
    QString StrOut_01 = numberStrIn.join(", ");
    ui->lineEdit_test->setText(QString(StrOut));
    /*
     * only for test
     */
    qDebug() << "(StrIn) before: " << StrIn;
    qDebug() << "(numberStrIn) QStringList: "  << numberStrIn;
    qDebug() << "(StrOut) : "  << StrOut;
    qDebug() << "(StrOut_01) after for: "  << StrOut_01;

    int length_1 = StrIn.length();
    int length_2 = StrOut.length();
    qDebug() << "length first string is: " << length_1;
    qDebug() << "length second string is: " << length_2;

    QString strOut_99(StrOut);

    QStringList list = strOut_99.split(" ",Qt::SkipEmptyParts);
    QString StrOut_numInt;
    foreach(QString StrOut_numInt, list)
    qDebug() << StrOut_numInt.toInt() << "   .... StrOut_numInt.toInt()";

    int arraylength = length_1;
    int testArray[arraylength] = { 0 }; // comment for test
    int i;
    int sumArray = 0;

    testArray[arraylength] = StrOut_numInt.toInt(); // comment for test
//    int testArray[arraylength] {49, 50, 97, 98}; // example....  (In string: 12ab)   (Sum is: 294)

    for (int i=0; i<arraylength; i++)
    {
        sumArray += testArray[i];
    }
    qDebug() <<  "sumArray is : " << sumArray;

    for (int i=0; i<arraylength; i++)
    {
    qDebug() << "test: " << i << " ... value: " << testArray[i];
    }
    ui->lineEdit_int_out->setText(QString::number(sumArray));
}

[mpergand]

    QStringList list = strOut_99.split(" ",QString::SkipEmptyParts);
    int arraylength = list.size();
    int testArray[arraylength];

    for(int i=0; i<arraylength; i++)
        {
        testArray[i]=list[i].toInt();
        }

    int sumArray = 0;
    for(int i=0; i<arraylength; i++)
        {
        sumArray+=testArray[i];
        }
   qDebug()<<sumArray;  // 294

[mpergand]

You give me headache !

QString StrOut_numInt;
foreach(QString StrOut_numInt, list)
      qDebug() << StrOut_numInt.toInt() << "   .... StrOut_numInt.toInt()";

StrOut_numInt still empty !

testArray[arraylength] = StrOut_numInt.toInt();

You write 0 out of bound array !

[gede]

sorry for the headache ...

but values ​​come out of the qdebug outpud ...

qDebug () << StrOut_numInt.toInt () << ".... StrOut_numInt.toInt ()";
49 .... StrOut_numInt.toInt ()
50 .... StrOut_numInt.toInt ()

testArray [arraylength] = StrOut_numInt.toInt ();

can you give me an example to use the string array to int correctly ... sorry I'm very confused

[mpergand]

    QStringList list = strOut_99.split(" ",QString::SkipEmptyParts);
    int arraylength = list.size();
    int testArray[arraylength];

    for(int i=0; i<arraylength; i++)
        {
        testArray[i]=list[i].toInt();
        }

    int sumArray = 0;
    for(int i=0; i<arraylength; i++)
        {
        sumArray+=testArray[i];
        }
   qDebug()<<sumArray;  // 294

[gede]

I never thought I'd use:

         int arraylength = list.size ();

         for (int i = 0; i <arraylength; i ++)
             {
             testArray [i] = list [i] .toInt ();
             }

I'm still too new, but I'm trying.

It works. Thank you very much

[mpergand]

A version that give me less headache ;)

QString str="12ab";
int sum=0;
QString ascii;

for(QChar c : str)
   {
   ushort u=c.unicode();
   sum+=u;
   ascii.append(QString("%1 ").arg(u));
   }
qDebug()<<"sum ="<<sum;
qDebug()<<"ascii values ="<<ascii;