сделали write_data()

main.cpp

@@ -17,20 +17,16 @@ Input input_data(std::istream& in, bool prompt)
 {
     Input data;
     size_t number_count;
-
     if(prompt)
     {
         cerr << "Enter the number of elements: ";
     }
-
     in >> number_count;
     data.numbers.resize(number_count);
-
     if(prompt)
     {
         cerr << "\nEnter " << number_count << " elements:" << endl;
     }
-
     for (size_t i = 0; i < number_count; i++)
     {
         in >> data.numbers[i];
@@ -39,9 +35,7 @@ Input input_data(std::istream& in, bool prompt)
     {
         cerr << "Enter the number of bins: ";
     }
-
     in >> data.bin_count;
-
     return data;
 }
 size_t write_data(void* items, size_t item_size, size_t item_count, void* ctx){