Main.cc: In function 'int main()': Main.cc:6:12: error: expected ',' or ';' before ':' token int c=3: ^ Main.cc:4:9: warning: unused variable 'a' [-Wunused-variable] int a=1; ^ Main.cc:5:9: warning: unused variable 'b' [-Wunused-variable] int b=2; ^ Main.cc:6:9: warning: unused variable 'c' [-Wunused-variable] int c=3: ^