//Чтение файла
int size; char *fileData;
ifstream file("big.txt", ios::binary);
file.seekg(0, ios::end);
size = file.tellg();
file.seekg(0, ios::beg);

fileData = new char[size + 1];

file.read(fileData, size);
fileData[size] = 0;
file.close();
//cout << fileData << endl;

//Остаток от деления на количество файлов
int ost = size % 20;
cout << ost << endl;

//Целая часть
int col = (size - ost) / 20;
cout << col << endl;

char **Pack = new char*[20]; //Выделяем память под количество строк
for (int i = 0; i<20; i++) Pack[i] = new char[size];

for (int i = 0; i<20; i++){
    strcpy(Pack[i] - col*i, fileData);
    cout << Pack[i] << endl << endl << endl;
    //printf("string - %s",pack[0]);
}

for (int i = 0; i < 20; i++) {
    delete[]Pack[i];
}
delete[]Pack;

for (int i = 0; i<20; i++) {
    strcpy(Pack[i] - col*i, fileData);

char longStr[] = "vbjhghjacvskv sdghjv sdghsdcv "
    "sdfhvghvdfghvsfdhgvksuygrugfqgawg q4ut6r7843"
    " grygfuyqwg gxegfuyegwdg fxkugsygwkxgywgryxg"
    "jakysgqgxcfasgsdfhjkahshchhcgashgsdfggsksgjs";

int main()
{
    const int partCount = 20;
    const int strLength = strlen(longStr);
    int partSize = (strLength+partCount-1) / partCount;

    char **Pack = new char*[partCount];
    for(int i = 0; i < partCount; ++i)
    {
        Pack[i] = new char[partSize+1];
        strncpy(Pack[i],longStr+partSize*i,partSize);
        Pack[i][partSize] = 0;
    }

    for(int i = 0; i < partCount; ++i)
    {
        cout << "Part " << setw(2) << i << ": " << Pack[i] << endl;
    }


    for(int i = 0; i < partCount; ++i)
    {
        delete[] Pack[i];
    }
    delete[] Pack;

}