char mass[300]={1,2,3,4,56,74,23,'g',t'}....
QString s;for (int i = 0; i < 200; ++i) { QChar c(mass[i]); if (c.isLetter()) s += c; else s += QString().setNum(mass[i]);}
QString::number(mass[i])
while (mass[i]!='\0')
mass[i]
char s[300];.if((s[i] >= '0') && (s[i] <= '9')) это цифраelse буква.