c++ findpattern

int CompareByteArray(PBYTE ByteArray1, PCHAR ByteArray2, PCHAR Mask, DWORD Length){    DWORD nextStart = 0;    char start = ByteArray2[0];    for (DWORD i = 0; i < Length; i++)    {        if (Mask[i] == '?')        {            continue;        }        if (ByteArray1[i] == start)        {            nextStart = i;        }        if (ByteArray1[i] != (BYTE)ByteArray2[i])        {            return nextStart;        }    }    return -1;} PBYTE FindSignature(LPVOID BaseAddress, DWORD ImageSize, PCHAR Signature, PCHAR Mask){    PBYTE Address = NULL;    PBYTE Buffer = (PBYTE) BaseAddress;     DWORD Length = strlen(Mask);     for (DWORD i = 0; i < (ImageSize - Length); i++)    {        int result = CompareByteArray((Buffer + i), Signature, Mask, Length);        if (result < 0)        {            Address = (PBYTE)BaseAddress + i;            break;        }        else        {            i += result;        }    }     return Address;}

// CPP program to illustrate  
// std::find 
// CPP program to illustrate  
// std::find 
#include<bits/stdc++.h> 
  
int main () 
{ 
    std::vector<int> vec { 10, 20, 30, 40 }; 
      
    // Iterator used to store the position  
    // of searched element 
    std::vector<int>::iterator it; 
      
    // Print Original Vector 
    std::cout << "Original vector :"; 
    for (int i=0; i<vec.size(); i++) 
        std::cout << " " << vec[i]; 
          
    std::cout << "\n"; 
      
    // Element to be searched 
    int ser = 30; 
      
    // std::find function call 
    it = std::find (vec.begin(), vec.end(), ser); 
    if (it != vec.end()) 
    { 
        std::cout << "Element " << ser <<" found at position : " ; 
        std::cout << it - vec.begin() << " (counting from zero) \n" ; 
    } 
    else
        std::cout << "Element not found.\n\n"; 
          
    return 0; 
}