ASCII码值转化十六进制，十进制数；十六进制字符值转十进制，ASCII码值；

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**用字符表示的十六进制值转化为十进制，ASCII码**

    bool ok;    QStringList list;//初始化list的内容为：list = ("30", "31", "32", "33", "34", "35", "36", "37", "38", "39", "43", "44", "4D", "4E") //初始化list    for(int i =0 ;i<10;i++)    {        QString temp = QString::number(30+i,10);        list<<temp;    }    list<<"43"<<"44"<<"4D"<<"4E";    qDebug()<<"list ="<<list;                   //list的十六进制数初始值    for(int i = 0 ;i<list.size() ;i++)    {        QString str_hex = list.at(i);           //获取十六进制数        int dec = str_hex.toInt(&ok,16);        //十六进制转十进制        char st = dec;                          //十进制数用char类型表示--->必须有此步直接转化不可行        QString str_ascii = QString(st);        //转化为ASCII值        qDebug()<<"  str_hex ="<<str_hex                <<"  dec ="<<dec                <<"  st ="<<st                <<"  ascii ="<<str_ascii;    }    //清空以便于之后的重新赋值    list.clear();

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ASCII码值转十六进制，十进制数

    //初始化list    for(int i =0 ;i<10;i++)    {        QString temp = QString::number(i,10);        list<<temp;    }    list<<"C"<<"D"<<"M"<<"N";     qDebug()<<"list ="<<list;                   //list的ASCII码初始值    for(int i = 0 ;i<list.size() ;i++)    {        QString str_ascii = list.at(i);              //获取ASCII值        QByteArray ascii = str_ascii.toLatin1();     //转化为QByteArray类型便于转化为十六进制        QByteArray ascii_H = ascii.toHex();          //将ASCII值转化为十六进制数值        QString str_hex = QString(ascii_H).toUpper();//十六进制数的大写表示        int dec  = str_hex.toInt(&ok,16);            //十六进制数转化为十进制数        qDebug()<<"  str_ascii ="<<str_ascii                <<"  ascii ="<<ascii                <<"  ascii_H ="<<ascii_H                <<"  str_hex ="<<str_hex                <<"  dec ="<<dec;    }

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若有错误请谅解！

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