QT int turns hexadecimal and add 0

Updated to 1 hour ago

Method 1,

QString key;

key =  QString("%1").arg(k,4,16,QLatin1Char('0'));//kforintType orcharAll types are OK

Method 2：

char chBuf[20];
sprintf(chBuf,"%02x",k);
key = QString::fromUtf8(chBuf);
or key = QString(QLatin1String(chBuf));

No need to make up0Will10Category conversion16Category string

key = QString::number(k, 16);
Qstring Convert char* Problem

QString qstr("hello,word");  

const char * p = qstr.toLocal8Bit().data(); 

const char *p = ().data();