How to resolve qbyteA[5] = qbyteB?

[hiuao]

Thank you for your kind help,but I have already try for many ways,such as

QByteArray byteA[9],byteB; or QByteArray *byteA,byteB;
byteA[0] = 0x23;//error: invalid conversion from `int' to `const char*'

QByteArray byteA[9],byteB; or QByteArray *byteA,byteB;
byteA[0] = 0x23;//error: invalid conversion from `int' to `const char*'

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I want to give

byteA[i] = 0xxx,byteA[j] = byteB

byteA[i] = 0xxx,byteA[j] = byteB

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,how I can do? Please!