how to create an array of Bitset in c++

Question

I want to create an array of Bitset .Binary Bitset(example "100","1010",etc) After that I want to input from user and store in the the Bitset . I have tried the following line but it says error.

#include<bits/stdc++> 
using namespace std;
int main() 
{ 
  int n,i;
  string bit_string; 
  cin>>n  // size of Bitset array.
  bitset<8> brr[n];//  
  for(i=0;i<n;i++)
  {
    cin>>bit_string;
    brr[i](bit_string);
  }



  return 0; 
}  

I want to create n Bitset each of size 8 bits.Where n is given by user. my input is binary string like. "110010","001110" please help

Answer 1

For dynamic count of the objects , Please try vector<> instead of array[]

#include<bits/stdc++> 
using namespace std;
int main()
{
    int n, i;
    string bit_string;
    cin >> n;  // size of Bitset array.

    vector<bitset<8>> arr;      //size()=>0
    arr.resize(n);      //size()=>n

    for (i = 0; i < n; i++)
    {
        cin >> bit_string;
        bitset<8>& br = arr[i]; //get the i of n

        int maxlen = 8;
        if (bit_string.size() <= 8)
            maxlen = bit_string.size();
        else
            cout << "warning invalid len " << bit_string.size() << " of " << bit_string << endl;

        for (int j = 0; j < maxlen; j++)
        {
            if (bit_string[j] == '1')
                br.set(j, true);
        }

        //cout << endl << br << endl;   //output test
    }

    return 0;
}

If you still want to use array , please try this way

#include<bits/stdc++> 
using namespace std;
int main()
{
    int n, i;
    string bit_string;
    cin >> n;  // size of Bitset array.

    bitset<8>* arr = new bitset<8>[n];

    for (i = 0; i < n; i++)
    {
        cin >> bit_string;
        bitset<8>& br = arr[i]; //get the i of n

        int maxlen = 8;
        if (bit_string.size() <= 8)
            maxlen = bit_string.size();
        else
            cout << "warning invalid len " << bit_string.size() << " of " << bit_string << endl;

        for (int j = 0; j < maxlen; j++)
        {
            if (bit_string[j] == '1')
                br.set(j, true);
        }

        //cout << endl << br << endl;   //output test
    }

    delete[] arr;   //IMPROTAND , delete the array and free memory

    return 0;
}