how can I check the donor if valid by using switch
function Is_BloodBroup_Valid // takes a string as parameter and return true if it is a valid
group and false if not. The only possible blood groups are A+, A-, B+, B-, 0+, 0-,
AB+, AB-.
also if I have a Constructor function with default values and one of the parameters was of struct type how I can assign value to it , like this
1. Constructor function with default values IdNumber = 0, name = "", bloodGroup = "",
home_Phone="", mobile_Phone="", address={0,0,0,"",""} An overloaded constructor that takes the same parameters of the constructor in except
Address for the address
this was my try
struct Address {
int house ,road ,block;
string city,country;
}add;
BloodDonor(int =0,string =" ",string =" ",string =" ",int add.house=0,int add.road=0,);
there are some errors.
Unsolved 
