Main.cc: In function 'int main()': Main.cc:10:5: error: expected ';' before 'b' b=456 ^ Main.cc:8:11: warning: unused variable 'b' [-Wunused-variable] int a,b,c; ^ Main.cc:8:13: warning: unused variable 'c' [-Wunused-variable] int a,b,c; ^