Main.cc:2:1: error: 'cin' does not name a type cin >> a; ^ Main.cc:3:1: error: expected unqualified-id before 'for' for(int i=0;i=0;i++){ ^ Main.cc:18:24: error: 'i' does not name a type }for(int i=strlen(a)-1;i>=0;i++){ ^ Main.cc:18:29: error: 'i' does not name a type }for(int i=strlen(a)-1;i>=0;i++){ ^ Main.cc:20:3: error: expected declaration before '}' token } } ^