C++ Convert char array to string array

  c++

I have next C++ code in VS2019 under Windows 10:

char const* const fileName = "random_StringArray_10000000";

FILE* infile;
long fileSize;
char* buffer;
size_t readBytes;        

infile = fopen(fileName, "rb");
if (infile == NULL)
{
    fputs("File error", stderr); exit(1);
}

fseek(infile, 0, SEEK_END);
fileSize = ftell(infile);
rewind(infile);

buffer = (char*)malloc(sizeof(char) * fileSize);
if (buffer == NULL)
{
    fputs("Memory error", stderr); exit(2);
}


auto start = chrono::steady_clock::now();

readBytes = fread(buffer, 1, fileSize, infile);   

auto end = chrono::steady_clock::now();

if (readBytes != fileSize)
{
    fputs("Reading error", stderr); exit(3);
}

fclose(infile);
free(buffer);

auto elapsed_ms = chrono::duration_cast<chrono::milliseconds>(end - start);

cout << "Elapsed ms: " << elapsed_ms.count() << endl;
cout << "String count: " << stringCount << endl;

system("pause");
return 0;

This method used because it is fastest way to read file from disk under VS2019.
Now i need to convert char array to the string array.
random_StringArray_10000000 – UTF8 text file.
Strings lenght 8 – 120 symbols.
Hex view of this file:
enter image description here

0x0D 0x0A separate strings.

Which fastest way to convert char array (buffer) to the string array?

Source: Windows Questions C++

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