도와주십쇼 ㅋㅋㅋ

 if(widget == Number0)
    {
           }
    else if(widget == Number1)
    {
                strBuf += QString("1");
    }
    else if(widget == Number2)
    {
                strBuf += QString("2");
    }
    else if(widget == Plus)
    {
        if((strBuf.toAscii().data())[strBuf.length()-1] != '+' && (strBuf.toAscii().data())[strBuf.length()-1] != '-' && (strBuf.toAscii().data())[strBuf.length()-1] != '*' && (strBuf.toAscii().data())[strBuf.length()-1] != '/')
        {
            strBuf += QString("+");
        }
    }
    else if(widget == Minus)
    {
        if((strBuf.toAscii().data())[strBuf.length()-1] != '+' && (strBuf.toAscii().data())[strBuf.length()-1] != '-' && (strBuf.toAscii().data())[strBuf.length()-1] != '*' && (strBuf.toAscii().data())[strBuf.length()-1] != '/')
        {
            strBuf += QString("-");
        }
    }
    else if(widget == Equal)
    {
        strBuf = QString("result:");
    }
 
 
......