Help

I am I wrong?*
#include
using namespace std;
int main() {
int a,b;
cout<<"entera<<“enter b”<<“enter c”;
cin>>a>>b>>c;
sum=a+b+c;
cout<<sum;
return 0;
}

You forgot to declare c.
int a,b;
should be
int a,b,c;

I think that you would normally input one variable at a time:

cout << "enter a: ";
cin >> a;
cout << "enter b: ";
cin >> b;

and so on.