View Compilation Error

0_0_39596756_10700.c:1:5: error: 'bit' undeclared here (not in a function)
    1 | s = bit.to_string();
      |     ^~~
0_0_39596756_10700.c:2:1: error: expected identifier or '(' before 'while'
    2 | while(s[num] == '0') num++;
      | ^~~~~