foo.cc: In function ‘int main()’:
foo.cc:12:26: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
   12 |                         {if (n%i==0)
      |                          ^~
foo.cc:14:38: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
   14 |                                      cout<<"No"<<endl;
      |                                      ^~~~
foo.cc:7:17: warning: ‘n’ is used uninitialized [-Wuninitialized]
    7 |         while (n>1)
      |                ~^~
foo.cc:6:13: note: ‘n’ was declared here
    6 |         int n;
      |             ^