foo.cc: In function 'int main()':
foo.cc:9:3: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   for(int j=0;j<n;j++)
   ^~~
foo.cc:11:4: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
    cout<<endl;
    ^~~~