Main.cc:18:3: error: 'cin' does not name a type cin>>a; ^ Main.cc:19:3: error: expected unqualified-id before 'if' if(a%2 ==1){ ^ Main.cc:21:4: error: expected unqualified-id before 'else' }else{ ^ Main.cc:26:3: error: expected unqualified-id before 'return' return 0; ^ Main.cc:27:2: error: expected declaration before '}' token } ^