creating an array of structs in c

Question

I m trying to create an array of structs  Is the code below valid  I keep getting an expected primary-expression before     token error   int main       int pause    struct Customer       int uid      string name          Customer customerRecords 2     customerRecords 0     25   Bob Jones      customerRecords 1     26   Jim Smith      cin  gt  gt  pause    return 0

User · Accepted Answer

Try this   Customer customerRecords 2      25   Bob Jones                                    26   Jim Smith

User · Answer

It works perfectly  I have gcc compiler C  11 ready  Try this and you ll see    include  lt iostream gt   using namespace std   int main         int pause       struct Customer                  int uid             string name              Customer customerRecords 2       customerRecords 0     25   Bob Jones        customerRecords 1     26   Jim Smith        cout  lt  lt  customerRecords 0  uid  lt  lt       lt  lt  customerRecords 0  name  lt  lt  endl      cout  lt  lt  customerRecords 1  uid  lt  lt       lt  lt  customerRecords 1  name  lt  lt  endl      cin  gt  gt  pause  return 0

User · Answer

You can t use an initialization-list for a struct after it s been initialized   You ve already default-initialized the two Customer structs when you declared the array customerRecords   Therefore you re going to have either use member-access syntax to set the value of the non-static data members  initialize the structs using a list of initialization lists when you declare the array itself  or you can create a constructor for your struct and use the default operator  member function to initialize the array members   So either of the following could work   Customer customerRecords 2   customerRecords 0  uid   25  customerRecords 0  name    Bob Jones   customerRecords 1  uid   25  customerRecords 1  namem    Jim Smith     Or if you defined a constructor for your struct like   Customer  Customer int id  string input name   uid id   name input name       You could then do   Customer customerRecords 2   customerRecords 0    Customer 25   Bob Jones    customerRecords 1    Customer 26   Jim Smith      Or you could do the sequence of initialization lists that Tuomas used in his answer   The reason his initialization-list syntax works is because you re actually initializing the Customer structs at the time of the declaration of the array  rather than allowing the structs to be default-initialized which takes place whenever you declare an aggregate data-structure like an array

User · Answer

Some compilers support compound literals as an extention  allowing this construct   Customer customerRecords 2   customerRecords 0     Customer  25   Bob Jones    customerRecords 1     Customer  26   Jim Smith      But it s rather unportable

[c++] creating an array of structs in c++

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