Something

char action;
int num1, num2;
cout << "Enter the numbers: ";
cin >> num1;
cin >> num2;

cout << "Enter your choice, (a)dd, (s)ubtract, (m)ultiply, (d)ivide: ";
cin >> action;

if(action=='a')
{
   cout << num1+num2:
}
if(action=='s')
{
   cout << num1-num2:
}
if(action=='m')
{
   cout << num1*num2:
}
if(action=='d')
{
   cout << num1/num2:
}