How to switch between different BYTE Arrays after user input?

I would like to switch between different BYTE Arrays after user input. I need to apply the same processing to different arrays depending on user input, but I would like to avoid repeating the code. One solution could be to create one array ahead of the if logic and then copys the correct byte pattern into that array. I need the BYTE variable someData in my main function because a followup function needs it for data processing.

Currently I am getting this error : 'someData' was not declared in this scope' This is my code:

#include <iostream>
#include <string>
#include <Windows.h>

using namespace std;

int main()
{
    string titel;
    std::cout << "CHOOSE PARAM: ";
    std::cin >> titel;

    if (titel == "PARAM1") {
        BYTE someData[17] = { 0x00, 0x87, 0x80, 0x83, 0x10, 0x09, 0x08, 0x00, 0x83, 0x00, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00 };
    }
    else if (titel == "PARAM2")
    {
        BYTE someData[16] = { 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xFF, 0xBE, 0x00, 0x40 };
    }
    else if (titel == "PARAM3")
    {
        BYTE someData[8] = { 0x01, 0x01, 0x16, 0xD5, 0x01, 0xD8, 0x00, 0x00 };
    }

    std::cout << "SomeData: ";

    for(int i = 0; i < 23; i++)
    {
        printf("%02x ", someData[i]);
    }
}

I would like to switch between different BYTE Arrays after user input.

Solution

As said, the someData must be declared outside the if-blocks:

#include <iostream>
#include <string>
#include <cstring>
#include <memory>
#include <Windows.h>

using namespace std;

int main()
{
    string titel;
    std::cout << "CHOOSE PARAM: ";
    std::cin >> titel;

    BYTE * someData = 0;
    int NsomeData =0 ;
    if (titel == "PARAM1") {
        BYTE tmp[17] = { 0x00, 0x87, 0x80, 0x83, 0x10, 0x09, 0x08, 0x00, 0x83, 0x00, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00 };
        someData = new BYTE[17] ;
        memcpy(someData,tmp,sizeof(BYTE[17])) ;
        NsomeData = 17 ;
    }
    else if (titel == "PARAM2")
    {
        BYTE tmp[16] = { 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xFF, 0xBE, 0x00, 0x40 };
        someData = new BYTE[16] ;
        memcpy(someData,tmp,sizeof(BYTE[16])) ;
        NsomeData = 16 ;
    }
    else if (titel == "PARAM3")
    {
        BYTE tmp[8] = { 0x01, 0x01, 0x16, 0xD5, 0x01, 0xD8, 0x00, 0x00 };
        someData = new BYTE[8] ;
        memcpy(someData,tmp, sizeof(BYTE[8])) ;
        NsomeData = 8 ;
    }

    std::cout << "SomeData: ";
    for(int i = 0; i < NsomeData; i++)
        printf("%02x ", someData[i]);
   
    delete[] someData ;
}