/in/foo.cc: In function 'int main()':
/in/foo.cc:13:4: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
    if(xx%10==k)
    ^~
/in/foo.cc:15:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
     xx=xx/10; 
     ^~
/in/foo.cc:18:8: warning: 'cnt' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<cnt<<endl; 
        ^~~