How to store json data in std::vector<unsigned char> ?

[Qt embedded developer]

i have seen some code where i retrieve data of json using below code:

                std::vector<unsigned char> VectorResponseData;
		VectorResponseData = txnContext->getPrivateData();
		std::string StrReSponseData(VectorResponseData.begin(),VectorResponseData.end());

		JSObject JSONResponseData;
		JSONResponseData.load(StrReSponseData);
		std::string strCardUID = "";

		strCardUID = JSONResponseData("AID").getString();
		txnContainer->setstrCardUID(strCardUID);
		LOGF_ERROR("AnalyzePaymentResponse::strCardUID:  %s",strCardUID.c_str());

So i want example that show how we can store json data in below vector ? if possible give the example.

std::vector<unsigned char> VectorResponseData;

[Qt embedded developer]

@Christian-Ehrlicher I got the answer :

actually i want to do something like below:

                        JSObject CardTopUpInfo;
			CardTopUpInfo("Topup_Mode") = pTransactionData->getSelectedTopUpMenuID();
			//CardTopUpInfo("Topup_Amount") = pTransactionData->getEnteredTopUpAmount();
			std::string tempStr = CardTopUpInfo.dump().c_str();
			DBGF_TRACE("AFCS::PrivateData: %s",tempStr);
			std::vector<unsigned char> vectr(tempStr.begin(),tempStr.end());

[Christian Ehrlicher]

And where's the relation to Qt here? Please go, take a book and learn basic c++.

What exactly do you want to store in your vector? Which variable from your code above?

[Qt embedded developer]

@Christian-Ehrlicher I got the answer :

actually i want to do something like below:

                        JSObject CardTopUpInfo;
			CardTopUpInfo("Topup_Mode") = pTransactionData->getSelectedTopUpMenuID();
			//CardTopUpInfo("Topup_Amount") = pTransactionData->getEnteredTopUpAmount();
			std::string tempStr = CardTopUpInfo.dump().c_str();
			DBGF_TRACE("AFCS::PrivateData: %s",tempStr);
			std::vector<unsigned char> vectr(tempStr.begin(),tempStr.end());

[Qt embedded developer]

@Christian-Ehrlicher can you suggest me book for c++. because i have intermediate knowledge. i know most of c++ except advance level concept.