foo.cc: In function ‘int main()’:
foo.cc:11:17: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation]
   11 |                 for(int i=1;i<=n;i++)
      |                 ^~~
foo.cc:13:25: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘for’
   13 |                         for(int i=1;i<=n;i++)
      |                         ^~~
foo.cc:16:30: warning: unused variable ‘c’ [-Wunused-variable]
   16 |                         bool c=0;
      |                              ^
foo.cc:20:25: error: ‘c’ was not declared in this scope
   20 |                         c=1;
      |                         ^
foo.cc:21:20: error: ‘c’ was not declared in this scope
   21 |                 if(c)
      |                    ^