How do you count the purple from the binary file using read()?

[zymir]

void read(int* arr) {
    ifstream file_if;
    file_if.open("arr.txt", ios::binary);
    if (!file_if.is_open())
        cout << "error opening file for reading" << endl;
    else
        file_if.read((char*)&arr, size); 
    file_if.close();
}

size - volume measurement;

file_if.read(char*) representarr, size); - reading from the file immediately into the whole range, before that, the record was in the file "file_of.write(char*) gauger, size);

[Jolied]

file_if.read((char*)arr, size * sizeof(int)); Reading a whole body;

file_if.read((char*)&arr, sizeof(int)); - reading one variable on which the index stands seekg()(on default at the beginning of the file);

for (int index = 0; index < size; ++index) {file_if.read((char*)arr[index], sizeof(int));}- reading one element in your mass under the number. index;
Works this way: we count the element on the file and keep it in the room. indexafter which the index is moved to sizeof(int);