Forest density

input/code.cpp: In function 'int main()':
input/code.cpp:11:22: error: no match for 'operator>>' (operand types are 'std::istream' {aka 'std::basic_istream<char>'} and 'char*')
   11 |             std::cin >> input;
      |             ~~~~~~~~ ^~ ~~~~~
      |                  |      |
      |                  |      char*
      |                  std::istream {aka std::basic_istream<char>}
In file included from /usr/include/c++/13/iostream:42,
                 from input/code.cpp:1:
/usr/include/c++/13/istream:325:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(void*&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  325 |       operator>>(void*& __p)
      |       ^~~~~~~~
/usr/include/c++/13/istream:325:7: note:   conversion of argument 1 would be ill-formed:
input/code.cpp:11:25: error: cannot bind non-const lvalue reference of type 'void*&' to...

#include "iostream"

int main() {
    int n, q;
    std::cin >> n >> q;
    int trees[n][n];
    int sums[n][n];
    char* input;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            std::cin >> input;
            trees[i][j] = (input == "*");
            sums[i][j] = trees[i][j];
            if (i > 0) sums[i][j] += sums[i-1][j];
            if (j > 0) sums[i][j] += sums[i][j-1];
        }
    }
    int inputs[q][4];
    for (int i = 0; i < q; i++) {
        std::cin >> inputs[i][0] >> inputs[i][1] >> inputs[i][2] >> inputs[i][3];
    }
    for (int i = 0; i < q; i++) {
        int sum = sums[inputs[i][3] - 1][inputs[i][2] - 1] - sums[inputs[i][1] - 1][inputs[i][0] - 1];
        std::cout << sum << std::endl;
    }
}