reading& writing binary data block by block

[Ramees219]

hi
i need to write some hex data into a binary file block by block and read it back same as block by block
i try to do it but some error i don't no how to fix this i am stuck i all kind of help appreciated thank u

#include <iostream>
#include <fstream>
#include <string>

using namespace std;



int main() {

	

	string block1 = "DEDEDEDEDEDEDEDEDEDEDED"; //  hex data
	string block2 = "AFAFAFAFAFAFAFAFAFA";  //  hex data
	string block3= "BFBFBFBFBFBFBFBFBFBBFBF"; // hex data

	string outBlock1;
        string outBlock2;
        string outBlock1;

	
	fstream file("example.bin", ios::binary | ios::in |ios::out | ios::trunc);

	if (!file.is_open()){

		cout << "error";
	}
	else
	{
		file.write((char *)&block1, sizeof(block1));
		file.write((char *)&block2, sizeof(block2));
		file.write((char *)&block3, sizeof(block3));


		file.read((char *)&indata, sizeof(indata));

	/*	cout << indata << endl;*/

	}

	file.close();
	return 0;

}

]