Main.cc:2:1: error: expected unqualified-id before 'for'
for(n=1;n<1001;n++){
^
Main.cc:2:9: error: 'n' does not name a type
for(n=1;n<1001;n++){
^
Main.cc:2:16: error: 'n' does not name a type
for(n=1;n<1001;n++){
^
Main.cc:5:5: error: 'cout' does not name a type
cout<