Main.cc: In function ‘int main()’: Main.cc:6:5: error: ‘scatf’ was not declared in this scope scatf(a,b); ^~~~~ Main.cc:6:5: note: suggested alternative: ‘scanf’ scatf(a,b); ^~~~~ scanf Main.cc:7:23: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘double’ [-Wformat=] printf("%d+%d",a,b); ^ Main.cc:7:23: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘double’ [-Wformat=]