/in/foo.cc: In function 'int main()':
/in/foo.cc:9:5: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
     while (X!=0);
     ^~~~~
/in/foo.cc:10:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'while'
     {
     ^
/in/foo.cc:12:11: error: 'x' was not declared in this scope
      sum+=x%10;
           ^