foo.cc: In function ‘void add()’:
foo.cc:18:5: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation]
   18 |     for(int i=1;i<=lb;i++)
      |     ^~~
foo.cc:23:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘for’
   23 |         if(b[lb+1]>0)lb++;
      |         ^~