...

main.cpp

@@ -1,10 +1,12 @@
 #include <iostream>
 
-using namespase std;
+using namespace std;
 
 int main(){
     cout << "Enter A and B: ";
     int a, b;
     cin >> a >> b;
     return 0;
+    cout << "A + B = " << a + b << '\n'
+         << "A - B = " << a - b << '\n';
 }