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i have the 6 digit hexadecimal array i want convert it into BMP in cpp.
can you please share the answers.

What I have tried:

i have array of 6 digit hexadecimals only.
#include <iostream>
#include <string>
#include <cstdlib>
#include <ctime>
using namespace std;

static const char alphanum[] =

int stringLength = sizeof(alphanum) - 1;
char genRandom()
	return alphanum[rand() % stringLength];

int main()
	std::string Str;
	for (int j = 0; j < 8; j++)
		for (unsigned int i = 0; i < 6; ++i)
			Str += genRandom();
		cout << Str << endl;
		Str = "\0";

Updated 9-Aug-18 5:14am

1 solution

The simpler part is converting the hexadecimal string representation of the numbers into actual bytes. You could use strtol, for instance.
The more complex part, if I got you, is the actual creation of a valid Bitmap. Luckily there is sample code on the web. See, for instance (I've not tested it) Create a bitmap bmp file pixel data |[^].

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