code: add sum A&B

main.cpp

@@ -4,6 +4,8 @@ using namespace std;
 
 int main()
 {
-    cout << "Hello world!" << endl;
+    cout << "Enter A and B: ";
-    return 0;
+    int a, b;
+    cin >> a >> b;
+    cout << "A + B = " << a + b << '\n';
 }