/in/foo.cc: In function 'int main()':
/in/foo.cc:13:8: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
        if(x1%y==0)
        ^~
/in/foo.cc:15:10: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
          y++;
          ^
/in/foo.cc:10:14: warning: unused variable 'n' [-Wunused-variable]
      int y=2,n;
              ^
/in/foo.cc:5:15: warning: unused variable 'x11' [-Wunused-variable]
   int x,x1,x2,x11;
               ^~~