View Compilation Error

0_0_24476949_27262.cpp: In function 'int unionn(int, int)':
0_0_24476949_27262.cpp:32:35: error: 'ans' was not declared in this scope
         if(abs(w[x] - w[y]) != s) ans++;
                                   ^
0_0_24476949_27262.cpp: In function 'int main()':
0_0_24476949_27262.cpp:41:14: error: too few arguments to function 'void init(int)'
         init();
              ^
0_0_24476949_27262.cpp:5:6: note: declared here
 void init(int x)
      ^
0_0_24476949_27262.cpp:47:17: error: 'ans' was not declared in this scope
         cout << ans << endl;
                 ^