code: add sum

main.cpp

@@ -4,6 +4,9 @@ using namespace std;
 
 int main()
 {
-    cout << "Hello world!" << endl;
+    cout << "Enter A and B";
+    int a, b;
+    cin >> a >> b;
+    cout << "A + B =" << a + b << '\n';
     return 0;
 }