add diff

main.cpp

@@ -7,5 +7,5 @@ int main()
     cout << "Enter A and B: ";
     int a, b;
     cin >> a >> b;
-    cout<<"a + b = "<<a+b<<endl;
+    cout<<"a + b = "<<a+b<<endl<<"a - b = "<<a-b<<endl;
 }