foo.cc: In function 'int main()':
foo.cc:9:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(int j=0; j<=i; j++)
  ^~~
foo.cc:10:24: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  cout<<setw(3)<<k<<" ";k+1;
                        ^
foo.cc:10:25: warning: statement has no effect [-Wunused-value]
  cout<<setw(3)<<k<<" ";k+1;
                        ~^~