Substract commit

main.cpp

@@ -1,4 +1,5 @@
 cout << "Enter A and B: ";
 int a, b;
 cin >> a >> b;
-cout << "A + B = " << a + b << '\n';
+cout << "A + B = " << a + b << '\n'
+<< "A - B = " << a - b << '\n';