/in/foo.cc: In function 'bignum operator*(bignum, bignum)':
/in/foo.cc:21:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for(ans.l=a.l+b.l;ans.l>1&&!ans.a[ans.l];ans.l--); return ans;
     ^~~
/in/foo.cc:21:56: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
     for(ans.l=a.l+b.l;ans.l>1&&!ans.a[ans.l];ans.l--); return ans;
                                                        ^~~~~~